You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
132 lines
166 KiB
132 lines
166 KiB
<!doctypehtml><html lang=zh-CN><meta charset=UTF-8><meta content=width=device-width name=viewport><meta content=#222 name=theme-color><meta content="Hexo 6.3.0" name=generator><link href=https://fonts.googleapis.com rel=preconnect><link href=https://cdnjs.cloudflare.com rel=preconnect><link href=/images/apple-touch-icon-next.png rel=apple-touch-icon sizes=180x180><link href=/images/favicon-32x32-next.png rel=icon sizes=32x32 type=image/png><link href=/images/favicon-16x16-next.png rel=icon sizes=16x16 type=image/png><link color=#222 href=/images/logo.svg rel=mask-icon><meta content=2X6S9P7CAjXjVvw8YyQR8pCu-B0oEu7O9quLgxXuWyA name=google-site-verification><meta content=dV8JGNzi0c name=baidu-site-verification><script>setTimeout(function(){var d=document.createElement("script");d.setAttribute("data-ad-client","ca-pub-7480618470784058"),d.async=!0,d.src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js",document.body.appendChild(d)},5e3),window.addEventListener?window.addEventListener("load",downloadJsAtOnload,!1):window.attachEvent?window.attachEvent("onload",downloadJsAtOnload):window.onload=downloadJsAtOnload</script><style>:root{--body-bg-color:#f5f7f9;--content-bg-color:#fff;--card-bg-color:#f5f5f5;--text-color:#555;--blockquote-color:#666;--link-color:#555;--link-hover-color:#222;--brand-color:#fff;--brand-hover-color:#fff;--table-row-odd-bg-color:#f9f9f9;--table-row-hover-bg-color:#f5f5f5;--menu-item-bg-color:#f5f5f5;--theme-color:#222;--btn-default-bg:#fff;--btn-default-color:#555;--btn-default-border-color:#555;--btn-default-hover-bg:#222;--btn-default-hover-color:#fff;--btn-default-hover-border-color:#222;--highlight-background:#f3f3f3;--highlight-foreground:#444;--highlight-gutter-background:#e1e1e1;--highlight-gutter-foreground:#555;color-scheme:light}html{line-height:1.15;-webkit-text-size-adjust:100%}details,main{display:block}pre{font-size:1em;overflow:auto;padding:10px;position:relative}abbr[title]{border-bottom:none;text-decoration:underline;text-decoration:underline dotted}b,strong{font-weight:bolder}code,kbd,samp{font-family:monospace,monospace;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}img{border-style:none}button,input,optgroup,select,textarea{font-family:inherit;font-size:100%;line-height:1.15;margin:0}button,input{overflow:visible}button,select{text-transform:none}[type=button],[type=reset],[type=submit],button{-webkit-appearance:button}[type=button]::-moz-focus-inner,[type=reset]::-moz-focus-inner,[type=submit]::-moz-focus-inner,button::-moz-focus-inner{border-style:none;padding:0}[type=button]:-moz-focusring,[type=reset]:-moz-focusring,[type=submit]:-moz-focusring,button:-moz-focusring{outline:ButtonText dotted 1px}fieldset{padding:.35em .75em .625em}legend{box-sizing:border-box;color:inherit;display:table;max-width:100%;padding:0;white-space:normal}progress{vertical-align:baseline}.table-container,textarea{overflow:auto}[type=checkbox],[type=radio]{box-sizing:border-box;padding:0}[type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button{height:auto}[type=search]{outline-offset:-2px;-webkit-appearance:textfield}[type=search]::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{font:inherit;-webkit-appearance:button}summary{display:list-item}[hidden],template{display:none}::selection{background:#262a30;color:#eee}body,html{height:100%}body{margin:0;background:var(--body-bg-color);box-sizing:border-box;color:var(--text-color);font-family:Lato,'PingFang SC','Microsoft YaHei',sans-serif;font-size:1.2em;line-height:2;min-height:100%;position:relative;transition:padding .2s ease-in-out}h1,h2,h3,h4,h5,h6{font-family:Lato,'PingFang SC','Microsoft YaHei',sans-serif;font-weight:700;line-height:1.5;margin:30px 0 15px}h1{font-size:1.5em}h2{font-size:1.375em}h3{font-size:1.25em}h4{font-size:1.125em}h5{font-size:1em}h6{font-size:.875em}p{margin:0 0 20px}a{background:0 0;border-bottom:1px solid #999;color:var(--link-color);cursor:pointer;outline:0;text-decoration:none;overflow-wrap:break-word}a:hover{border-bottom-color:var(--link-hover-color);color:var(--link-hover-color)}embed,iframe,img,video{display:block;margin-left:auto;margin-right:auto;max-width:100%}hr{box-sizing:content-box;overflow:visible;background-image:repeating-linear-gradient(-45deg,#ddd,#ddd 4px,transparent 4px,transparent 8px);border:0;height:3px;margin:40px 0}blockquote{border-left:4px solid #ddd;color:var(--blockquote-color);margin:0;padding:0 15px}blockquote cite::before{content:'-';padding:0 5px}dt{font-weight:700}dd{margin:0;padding:0}table{border-collapse:collapse;border-spacing:0;font-size:.875em;margin:0 0 20px;width:100%}tbody tr:nth-of-type(odd){background:var(--table-row-odd-bg-color)}tbody tr:hover{background:var(--table-row-hover-bg-color)}caption,td,th{padding:8px}td,th{border:1px solid #ddd;border-bottom:3px solid #ddd}th{font-weight:700;padding-bottom:10px}td{border-bottom-width:1px}.btn{background:var(--btn-default-bg);border:2px solid var(--btn-default-border-color);border-radius:2px;color:var(--btn-default-color);display:inline-block;font-size:.875em;line-height:2;padding:0 20px;transition:background-color .2s ease-in-out}.btn:hover{background:var(--btn-default-hover-bg);border-color:var(--btn-default-hover-border-color);color:var(--btn-default-hover-color)}.btn+.btn{margin:0 0 8px 8px}.btn .fa-fw{text-align:left;width:1.285714285714286em}.toggle{line-height:0}.toggle .toggle-line{background:#fff;display:block;height:2px;left:0;position:relative;top:0;transition:.4s;width:100%}.toggle .toggle-line:first-child{margin-top:1px}.toggle .toggle-line:not(:first-child){margin-top:4px}.toggle.toggle-arrow :first-child{left:50%;top:2px;transform:rotate(45deg);width:50%}.toggle.toggle-arrow :last-child{left:50%;top:-2px;transform:rotate(-45deg);width:50%}.toggle.toggle-close :nth-child(2){opacity:0}.toggle.toggle-close :first-child{top:6px;transform:rotate(45deg)}.toggle.toggle-close :last-child{top:-6px;transform:rotate(-45deg)}code[class*=language-],pre[class*=language-]{color:#000;background:0 0;text-shadow:0 1px #fff;font-family:Consolas,Monaco,'Andale Mono','Ubuntu Mono',monospace;font-size:1em;text-align:left;white-space:pre;word-spacing:normal;word-break:normal;word-wrap:normal;line-height:1.5;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-hyphens:none;-moz-hyphens:none;-ms-hyphens:none;hyphens:none}code[class*=language-] ::-moz-selection,code[class*=language-]::-moz-selection,pre[class*=language-] ::-moz-selection,pre[class*=language-]::-moz-selection{text-shadow:none;background:#b3d4fc}code[class*=language-] ::selection,code[class*=language-]::selection,pre[class*=language-] ::selection,pre[class*=language-]::selection{text-shadow:none;background:#b3d4fc}@media print{code[class*=language-],pre[class*=language-]{text-shadow:none}}pre[class*=language-]{padding:1em;margin:.5em 0;overflow:auto}:not(pre)>code[class*=language-],pre[class*=language-]{background:#f5f2f0}:not(pre)>code[class*=language-]{padding:.1em;border-radius:.3em;white-space:normal}.token.cdata,.token.comment,.token.doctype,.token.prolog{color:#708090}.token.punctuation{color:#999}.token.namespace{opacity:.7}.token.boolean,.token.constant,.token.deleted,.token.number,.token.property,.token.symbol,.token.tag{color:#905}.token.attr-name,.token.builtin,.token.char,.token.inserted,.token.selector,.token.string{color:#690}.language-css .token.string,.style .token.string,.token.entity,.token.operator,.token.url{color:#9a6e3a;background:hsla(0,0%,100%,.5)}.token.atrule,.token.attr-value,.token.keyword{color:#07a}.token.class-name,.token.function{color:#dd4a68}.token.important,.token.regex,.token.variable{color:#e90}.token.bold,.token.important{font-weight:700}.token.italic{font-style:italic}.token.entity{cursor:help}pre[class*=language-].line-numbers{position:relative;padding-left:3.8em;counter-reset:linenumber}pre[class*=language-].line-numbers>code{position:relative;white-space:inherit}.line-numbers .line-numbers-rows{position:absolute;pointer-events:none;top:0;font-size:100%;left:-3.8em;width:3em;letter-spacing:-1px;border-right:1px solid #999;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.line-numbers-rows>span{display:block;counter-increment:linenumber}.line-numbers-rows>span:before{content:counter(linenumber);color:#999;display:block;padding-right:.8em;text-align:right}.highlight:hover .copy-btn,pre:hover .copy-btn{opacity:1}figure.highlight .table-container{position:relative;border-radius:0 0 5px 5px}.copy-btn{color:#333;cursor:pointer;line-height:1.6;opacity:0;padding:2px 6px;position:absolute;transition:opacity .2s ease-in-out;color:var(--highlight-foreground);font-size:14px;right:0;top:2px}figure.highlight{border-radius:5px;box-shadow:0 10px 30px 0 rgba(0,0,0,.4);padding-top:30px;overflow:auto;position:relative}figure.highlight::before{background:#fc625d;box-shadow:20px 0 #fdbc40,40px 0 #35cd4b;left:12px;margin-top:-20px;position:absolute;border-radius:50%;content:' ';height:12px;width:12px}code,figure.highlight,kbd,pre{background:var(--highlight-background);color:var(--highlight-foreground)}figure.highlight,pre{line-height:1.6;margin:0 auto 20px}figure.highlight figcaption,pre .caption,pre figcaption{background:var(--highlight-gutter-background);color:var(--highlight-foreground);display:flow-root;font-size:.875em;line-height:1.2;padding:.5em}figure.highlight figcaption a,pre .caption a,pre figcaption a{color:var(--highlight-foreground);float:right}figure.highlight figcaption a:hover,pre .caption a:hover,pre figcaption a:hover{border-bottom-color:var(--highlight-foreground)}code,pre{font-family:consolas,Menlo,monospace,'PingFang SC','Microsoft YaHei'}code{border-radius:3px;font-size:.875em;padding:2px 4px;overflow-wrap:break-word}kbd{border:2px solid #ccc;border-radius:.2em;box-shadow:.1em .1em .2em rgba(0,0,0,.1);font-family:inherit;padding:.1em .3em;white-space:nowrap}figure.highlight pre{border:0;margin:0;padding:10px 0}figure.highlight table{border:0;margin:0;width:auto}figure.highlight td{border:0;padding:0}figure.highlight .gutter{-moz-user-select:none;-ms-user-select:none;-webkit-user-select:none;user-select:none}figure.highlight .gutter pre{background:var(--highlight-gutter-background);color:var(--highlight-gutter-foreground);padding-left:10px;padding-right:10px;text-align:right}figure.highlight .code pre{padding-left:10px;width:100%}figure.highlight .marked{background:rgba(0,0,0,.3)}pre .caption,pre figcaption{margin-bottom:10px}.gist table{width:auto}.gist table td{border:0}pre code{background:0 0;padding:0;text-shadow:none}.blockquote-center{border-left:0;margin:40px 0;padding:0;position:relative;text-align:center}.blockquote-center::after,.blockquote-center::before{left:0;line-height:1;opacity:.6;position:absolute;width:100%}.blockquote-center::before{border-top:1px solid #ccc;text-align:left;top:-20px;content:'\f10d';font-family:'Font Awesome 6 Free';font-weight:900}.blockquote-center::after{border-bottom:1px solid #ccc;bottom:-20px;text-align:right;content:'\f10e';font-family:'Font Awesome 6 Free';font-weight:900}.blockquote-center div,.blockquote-center p{text-align:center}.group-picture{margin-bottom:20px}.group-picture .group-picture-row{display:flex;gap:3px;margin-bottom:3px}.group-picture .group-picture-column{flex:1}.group-picture .group-picture-column img{height:100%;margin:0;object-fit:cover;width:100%}.post-body .label{color:#555;padding:0 2px}.post-body .label.default{background:#f0f0f0}.post-body .label.primary{background:#efe6f7}.post-body .label.info{background:#e5f2f8}.post-body .label.success{background:#e7f4e9}.post-body .label.warning{background:#fcf6e1}.post-body .label.danger{background:#fae8eb}.post-body .link-grid{display:grid;grid-gap:1.5rem;gap:1.5rem;grid-template-columns:1fr 1fr;margin-bottom:20px;padding:1rem}.post-body .link-grid .link-grid-container{border:solid #ddd;box-shadow:1rem 1rem .5rem rgba(0,0,0,.5);min-height:5rem;min-width:0;padding:.5rem;position:relative;transition:background .3s}.post-body .link-grid .link-grid-container:hover{animation:.5s next-shake;background:var(--card-bg-color)}.post-body .link-grid .link-grid-container:active{box-shadow:.5rem .5rem .25rem rgba(0,0,0,.5);transform:translate(.2rem,.2rem)}.post-body .link-grid .link-grid-container .link-grid-image{border:1px solid #ddd;border-radius:50%;box-sizing:border-box;height:5rem;padding:3px;position:absolute;width:5rem}.post-body .link-grid .link-grid-container p{margin:0 1rem 0 6rem}.post-body .link-grid .link-grid-container p:first-of-type{font-size:1.2em}.post-body .link-grid .link-grid-container p:last-of-type{font-size:.8em;line-height:1.3rem;opacity:.7}.post-body .link-grid .link-grid-container a{border:0;height:100%;left:0;position:absolute;top:0;width:100%}@keyframes next-shake{0%{transform:translate(1pt,1pt) rotate(0)}10%{transform:translate(-1pt,-2pt) rotate(-1deg)}20%{transform:translate(-3pt,0) rotate(1deg)}30%{transform:translate(3pt,2pt) rotate(0)}40%{transform:translate(1pt,-1pt) rotate(1deg)}50%{transform:translate(-1pt,2pt) rotate(-1deg)}60%{transform:translate(-3pt,1pt) rotate(0)}70%{transform:translate(3pt,1pt) rotate(-1deg)}80%{transform:translate(-1pt,-1pt) rotate(1deg)}90%{transform:translate(1pt,2pt) rotate(0)}100%{transform:translate(1pt,-2pt) rotate(-1deg)}}.post-body .note{border-radius:3px;margin-bottom:20px;padding:1em;position:relative;border:1px solid #eee;border-left-width:5px}.post-body .note summary{cursor:pointer;outline:0}.post-body .note summary p{display:inline}.post-body .note h2,.post-body .note h3,.post-body .note h4,.post-body .note h5,.post-body .note h6{border-bottom:initial;margin:0;padding-top:0}.post-body .note :first-child{margin-top:0}.post-body .note :last-child{margin-bottom:0}.post-body .note.default{border-left-color:#777}.post-body .note.default h2,.post-body .note.default h3,.post-body .note.default h4,.post-body .note.default h5,.post-body .note.default h6{color:#777}.post-body .note.primary{border-left-color:#6f42c1}.post-body .note.primary h2,.post-body .note.primary h3,.post-body .note.primary h4,.post-body .note.primary h5,.post-body .note.primary h6{color:#6f42c1}.post-body .note.info{border-left-color:#428bca}.post-body .note.info h2,.post-body .note.info h3,.post-body .note.info h4,.post-body .note.info h5,.post-body .note.info h6{color:#428bca}.post-body .note.success{border-left-color:#5cb85c}.post-body .note.success h2,.post-body .note.success h3,.post-body .note.success h4,.post-body .note.success h5,.post-body .note.success h6{color:#5cb85c}.post-body .note.warning{border-left-color:#f0ad4e}.post-body .note.warning h2,.post-body .note.warning h3,.post-body .note.warning h4,.post-body .note.warning h5,.post-body .note.warning h6{color:#f0ad4e}.post-body .note.danger{border-left-color:#d9534f}.post-body .note.danger h2,.post-body .note.danger h3,.post-body .note.danger h4,.post-body .note.danger h5,.post-body .note.danger h6{color:#d9534f}.post-body .tabs{margin-bottom:20px}.post-body .tabs,.tabs-comment{padding-top:10px}.post-body .tabs ul.nav-tabs,.tabs-comment ul.nav-tabs{background:var(--content-bg-color);display:flex;display:flex;flex-wrap:wrap;justify-content:center;margin:0;padding:0;position:-webkit-sticky;position:sticky;top:0;z-index:5}.post-body .tabs ul.nav-tabs li.tab,.tabs-comment ul.nav-tabs li.tab{border-bottom:1px solid #ddd;border-left:1px solid transparent;border-right:1px solid transparent;border-radius:0;border-top:3px solid transparent;flex-grow:1;list-style-type:none}@media (max-width:413px){.post-body .tabs ul.nav-tabs,.tabs-comment ul.nav-tabs{display:block;margin-bottom:5px}.post-body .tabs ul.nav-tabs li.tab,.tabs-comment ul.nav-tabs li.tab{border-bottom:1px solid transparent;border-left:3px solid transparent;border-right:1px solid transparent;border-top:1px solid transparent;border-radius:0}}.post-body .tabs ul.nav-tabs li.tab a,.tabs-comment ul.nav-tabs li.tab a{border-bottom:initial;display:block;line-height:1.8;padding:.25em .75em;text-align:center;transition:.2s ease-out}.post-body .tabs ul.nav-tabs li.tab a i,.tabs-comment ul.nav-tabs li.tab a i{width:1.285714285714286em}.post-body .tabs ul.nav-tabs li.tab.active,.tabs-comment ul.nav-tabs li.tab.active{border-color:#fc6423 #ddd transparent}@media (max-width:413px){.post-body .tabs ul.nav-tabs li.tab.active,.tabs-comment ul.nav-tabs li.tab.active{border-color:#ddd #ddd #ddd #fc6423}}.post-body .tabs ul.nav-tabs li.tab.active a,.tabs-comment ul.nav-tabs li.tab.active a{cursor:default}.post-body .tabs .tab-content,.tabs-comment .tab-content{border:1px solid #ddd;border-radius:0;border-top-color:transparent}@media (max-width:413px){.post-body .tabs .tab-content,.tabs-comment .tab-content{border-radius:0;border-top-color:#ddd}}.post-body .tabs .tab-content .tab-pane,.tabs-comment .tab-content .tab-pane{padding:20px 20px 0}.post-body .tabs .tab-content .tab-pane:not(.active),.tabs-comment .tab-content .tab-pane:not(.active){display:none}.pagination .next,.pagination .page-number,.pagination .prev,.pagination .space{display:inline-block;margin:-1px 10px 0;padding:0 10px}.algolia-pagination .current .page-number,.pagination .page-number.current{background:#ccc;border-color:#ccc;color:var(--content-bg-color)}.pagination{border-top:1px solid #eee;margin:120px 0 0;text-align:center}.pagination .next,.pagination .page-number,.pagination .prev{border-bottom:0;border-top:1px solid #eee;transition:border-color .2s ease-in-out}.pagination .next:hover,.pagination .page-number:hover,.pagination .prev:hover{border-top-color:var(--link-hover-color)}@media (max-width:767px){.post-body .link-grid{grid-template-columns:1fr}.pagination .next,.pagination .page-number,.pagination .prev,.pagination .space{margin:0 5px}.pagination{border-top:0}.pagination .next,.pagination .page-number,.pagination .prev{border-bottom:1px solid #eee;border-top:0}.pagination .next:hover,.pagination .page-number:hover,.pagination .prev:hover{border-bottom-color:var(--link-hover-color)}.site-meta{text-align:center}}.pagination .space{margin:0;padding:0}.comments{margin-top:60px;overflow:hidden}.comment-button-group{display:flex;display:flex;flex-wrap:wrap;justify-content:center;justify-content:center;margin:1em 0}.comment-button-group .comment-button{margin:.1em .2em}.comment-button-group .comment-button.active{background:var(--btn-default-hover-bg);border-color:var(--btn-default-hover-border-color);color:var(--btn-default-hover-color)}.comment-position{display:none}.comment-position.active{display:block}.tabs-comment{margin-top:4em;padding-top:0}.tabs-comment .comments{margin-top:0;padding-top:0}.headband{background:var(--theme-color);height:3px}@media (max-width:991px){.headband{display:none}}.site-brand-container{display:flex;flex-shrink:0;padding:0 10px}.use-motion .column,.use-motion .site-brand-container .toggle{opacity:0}.site-meta{flex-grow:1;text-align:center}.custom-logo-image{margin-top:20px}@media (max-width:991px){.custom-logo-image{display:none}}.brand{border-bottom:0;color:var(--brand-color);display:inline-block;padding:0}.brand:hover{color:var(--brand-hover-color)}.site-title{font-family:Lato,'PingFang SC','Microsoft YaHei',sans-serif;font-size:1.375em;font-weight:400;line-height:1.5;margin:0}.site-subtitle{color:#ddd;font-size:.8125em;margin:10px 10px 0}.use-motion .custom-logo-image,.use-motion .site-subtitle,.use-motion .site-title{opacity:0;position:relative;top:-10px}.site-nav-right,.site-nav-toggle{display:none}.site-nav-right .toggle,.site-nav-toggle .toggle{color:var(--text-color);padding:10px;width:22px}.site-nav-right .toggle .toggle-line,.site-nav-toggle .toggle .toggle-line{background:var(--text-color);border-radius:1px}@media (max-width:767px){.site-nav-right,.site-nav-toggle{display:flex;flex-direction:column;justify-content:center}.site-nav{--scroll-height:0;height:0;overflow:hidden;transition:height .2s ease-in-out}body:not(.site-nav-on) .site-nav .animated{animation:none}body.site-nav-on .site-nav{height:var(--scroll-height)}}.menu{margin:0;padding:1em 0;text-align:center}.menu-item{display:inline-block;list-style:none;margin:0 10px}@media (max-width:767px){.menu-item{display:block;margin-top:10px}.menu-item.menu-item-search{display:none}}.menu-item a{border-bottom:0;display:block;font-size:.8125em;transition:border-color .2s ease-in-out}.menu-item a.menu-item-active,.menu-item a:hover{background:var(--menu-item-bg-color)}.menu-item .fa,.menu-item .fab,.menu-item .far,.menu-item .fas{margin-right:8px}.menu-item .badge{display:inline-block;font-weight:700;line-height:1;margin-left:.35em;margin-top:.35em;text-align:center;white-space:nowrap}.use-motion .menu-item{visibility:hidden}.github-corner :hover .octo-arm{animation:560ms ease-in-out octocat-wave}.github-corner svg{color:#fff;fill:var(--theme-color);position:absolute;right:0;top:0;z-index:5}@media (max-width:991px){.github-corner{display:none}.github-corner svg{color:var(--theme-color);fill:#fff}.github-corner .github-corner:hover .octo-arm{animation:none}.github-corner .github-corner .octo-arm{animation:560ms ease-in-out octocat-wave}}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}.sidebar-inner{color:#999;padding:18px 10px;text-align:center;display:flex;flex-direction:column;justify-content:center}.cc-license .cc-opacity{border-bottom:0;opacity:.7}.cc-license .cc-opacity:hover{opacity:.9}.cc-license img{display:inline-block}.site-author-image{border:1px solid #eee;max-width:120px;padding:2px}.site-author-name{color:var(--text-color);font-weight:600;margin:0}.site-description{color:#999;font-size:.8125em;margin-top:0}.links-of-author a{font-size:.8125em}.links-of-author .fa,.links-of-author .fab,.links-of-author .far,.links-of-author .fas{margin-right:2px}.sidebar .sidebar-button:not(:first-child){margin-top:15px}.sidebar .sidebar-button button{background:0 0;cursor:pointer;line-height:2;padding:0 15px;border-radius:4px}.sidebar .sidebar-button button .fa,.sidebar .sidebar-button button .fab,.sidebar .sidebar-button button .far,.sidebar .sidebar-button button .fas{margin-right:5px}.links-of-blogroll{font-size:.8125em}.links-of-blogroll-title{font-size:.875em;font-weight:600}.links-of-blogroll-list{list-style:none;margin:0;padding:0}.sidebar-nav{display:none;margin:0;padding-bottom:20px;padding-left:0}.sidebar-nav-active .sidebar-nav{display:block}.sidebar-nav li{border-bottom:1px solid transparent;color:var(--text-color);cursor:pointer;display:inline-block;font-size:.875em}.sidebar-nav li.sidebar-nav-overview{margin-left:10px}.sidebar-nav li:hover{color:#fc6423}.sidebar-overview-active .sidebar-nav-overview,.sidebar-toc-active .sidebar-nav-toc{border-bottom-color:#fc6423;color:#fc6423}.sidebar-overview-active .sidebar-nav-overview:hover,.sidebar-toc-active .sidebar-nav-toc:hover{color:#fc6423}.sidebar-panel-container{flex:1;overflow-x:hidden;overflow-y:auto}.sidebar-panel{display:none}.sidebar-overview-active .site-overview-wrap{display:flex;flex-direction:column;justify-content:center;gap:10px}.sidebar-toc-active .post-toc-wrap{display:block}.sidebar-toggle{bottom:61px;height:16px;padding:5px;width:16px;background:#222;cursor:pointer;opacity:.6;position:fixed;z-index:30;right:30px}.sidebar-toggle:hover{opacity:.8}@media (max-width:991px){.sidebar-toggle{right:20px;opacity:.8}}.sidebar-toggle:hover .toggle-line{background:#fc6423}@media (any-hover:hover){body:not(.sidebar-active) .sidebar-toggle:hover :first-child{left:50%;top:2px;transform:rotate(45deg);width:50%}body:not(.sidebar-active) .sidebar-toggle:hover :last-child{left:50%;top:-2px;transform:rotate(-45deg);width:50%}}.sidebar-active .sidebar-toggle :nth-child(2){opacity:0}.sidebar-active .sidebar-toggle :first-child{top:6px;transform:rotate(45deg)}.sidebar-active .sidebar-toggle :last-child{top:-6px;transform:rotate(-45deg)}.post-toc{font-size:.875em}.post-toc ol{list-style:none;margin:0;padding:0 2px 5px 10px;text-align:left}.post-toc ol>ol{padding-left:0}.post-toc ol a{transition:.2s ease-in-out}.post-toc .nav-item{line-height:1.8;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.post-toc .nav .nav-child{display:none}.post-toc .nav .active-current>.nav-child,.post-toc .nav .active-current>.nav-child>.nav-item,.post-toc .nav .active>.nav-child{display:block}.post-toc .nav .active>a{border-bottom-color:#fc6423;color:#fc6423}.post-toc .nav .active-current>a,.post-toc .nav .active-current>a:hover{color:#fc6423}.site-state{display:flex;flex-wrap:wrap;justify-content:center;line-height:1.4}.site-state-item a{border-bottom:0;display:block}.site-state-item-count{display:block;font-size:1em;font-weight:600}.site-state-item-name{color:#999;font-size:.8125em}.sidebar-post-related{font-size:.8125em;padding:18px 0 0}.popular-posts{margin:0;padding:1em 0;text-align:left}.popular-posts .popular-posts-item{display:block}.popular-posts .popular-posts-item .popular-posts-link{border-bottom:0;display:block;padding:5px 20px;transition:background .2s ease-in-out}.popular-posts .popular-posts-item .popular-posts-link:hover{background:var(--menu-item-bg-color)}.popular-posts .popular-posts-item .popular-posts-time{color:#999}.footer{color:#999;font-size:.875em;padding:20px 0}.footer.footer-fixed{bottom:0;left:0;position:absolute;right:0}.footer-inner{box-sizing:border-box;text-align:center;display:flex;flex-direction:column;justify-content:center;margin:0 auto;width:calc(100% - 20px)}@media (max-width:767px){.menu-item .badge{float:right;margin-left:0}.footer-inner{width:auto}}@media (min-width:1200px){.footer-inner{width:1160px}}@media (min-width:1600px){.footer-inner{width:73%}}.use-motion .footer{opacity:0}.languages{display:inline-block;font-size:1.125em;position:relative}.languages .lang-select-label span{margin:0 .5em}.languages .lang-select{height:100%;left:0;opacity:0;position:absolute;top:0;width:100%}.with-love{color:red;display:inline-block;margin:0 5px}.beian img{display:inline-block;margin:0 3px;vertical-align:middle}.busuanzi-count #busuanzi_container_site_pv,.busuanzi-count #busuanzi_container_site_uv{display:none}@keyframes icon-animate{0%,100%{transform:scale(1)}10%,30%{transform:scale(.9)}20%,40%,50%,60%,70%,80%{transform:scale(1.1)}}@media (max-width:567px){.main-inner{padding:initial!important}.posts-expand .post-header{margin-bottom:10px!important}.post-block{margin-top:initial!important;padding:8px 18px!important}.post-body h1,.post-body h2,.post-body h3,.post-body h4,.post-body h5,.post-body h6{margin:20px 0 8px}.post-body .note h1,.post-body .note h2,.post-body .note h3,.post-body .note h4,.post-body .note h5,.post-body .note h6,.post-body .tabs .tab-content .tab-pane h1,.post-body .tabs .tab-content .tab-pane h2,.post-body .tabs .tab-content .tab-pane h3,.post-body .tabs .tab-content .tab-pane h4,.post-body .tabs .tab-content .tab-pane h5,.post-body .tabs .tab-content .tab-pane h6{margin:0 5px}.post-body>p{margin:0 0 10px}.post-body .note>p,.post-body .tabs .tab-content .tab-pane>p{padding:0 5px}.post-body img,.post-body video{margin-bottom:10px!important}.post-body .note{margin-bottom:10px!important;padding:10px!important}.post-body .tabs .tab-content .tab-pane{padding:10px 10px 0!important}.post-eof{margin:40px auto 20px!important}.pagination{margin-top:40px}}.back-to-top{font-size:12px;align-items:center;bottom:-100px;color:#fff;display:flex;height:26px;transition:bottom .2s ease-in-out;background:#222;cursor:pointer;opacity:.6;position:fixed;z-index:30;right:30px}.back-to-top span{margin-right:8px;display:none}.back-to-top .fa{text-align:center;width:26px}.back-to-top:hover{opacity:.8;color:#fc6423}.back-to-top.back-to-top-on{bottom:30px}.rtl.post-body a,.rtl.post-body h1,.rtl.post-body h2,.rtl.post-body h3,.rtl.post-body h4,.rtl.post-body h5,.rtl.post-body h6,.rtl.post-body li,.rtl.post-body ol,.rtl.post-body p,.rtl.post-body ul{direction:rtl;font-family:UKIJ Ekran}.rtl.post-title{font-family:UKIJ Ekran}.post-button{margin-top:40px;text-align:center}.use-motion .collection-header,.use-motion .comments,.use-motion .pagination,.use-motion .post-block,.use-motion .post-body,.use-motion .post-header{visibility:hidden}.posts-collapse .post-content{margin-bottom:35px;margin-left:35px;position:relative}@media (max-width:767px){.posts-collapse .post-content{margin-left:0;margin-right:0}}.posts-collapse .post-content .collection-title{font-size:1.125em;position:relative}.posts-collapse .post-content .collection-title::before{background:#999;border:1px solid #fff;margin-left:-6px;margin-top:-4px;position:absolute;top:50%;border-radius:50%;content:' ';height:10px;width:10px}.posts-collapse .post-content .collection-year{font-size:1.5em;font-weight:700;margin:60px 0;position:relative}.posts-collapse .post-content .collection-year::before{background:#bbb;margin-left:-4px;margin-top:-4px;position:absolute;top:50%;border-radius:50%;content:' ';height:8px;width:8px}.posts-collapse .post-content .collection-header{display:block;margin-left:20px}.posts-collapse .post-content .collection-header small{color:#bbb;margin-left:5px}.posts-collapse .post-content .post-header{border-bottom:1px dashed #ccc;margin:30px 2px 0;padding-left:15px;position:relative;transition:border .2s ease-in-out}.posts-collapse .post-content .post-header::before{background:#bbb;border:1px solid #fff;left:-6px;position:absolute;top:.75em;transition:background .2s ease-in-out;border-radius:50%;content:' ';height:6px;width:6px}.posts-collapse .post-content .post-header:hover{border-bottom-color:#666}.posts-collapse .post-content .post-header:hover::before{background:#222}.posts-collapse .post-content .post-meta-container{display:inline;font-size:.75em;margin-right:10px}.posts-collapse .post-content .post-title{display:inline}.posts-collapse .post-content .post-title a{border-bottom:0;color:var(--link-color)}.posts-collapse .post-content .post-title .fa-external-link-alt{font-size:.875em;margin-left:5px}.posts-collapse .post-content::before{background:#f5f5f5;content:' ';height:100%;margin-left:-2px;position:absolute;top:1.25em;width:4px}.post-body{font-family:Lato,'PingFang SC','Microsoft YaHei',sans-serif;overflow-wrap:break-word}@media (min-width:1200px){.post-body{font-size:1.125em}}@media (min-width:992px){.post-body{text-align:justify}}.post-body h1 .header-anchor,.post-body h1 .headerlink,.post-body h2 .header-anchor,.post-body h2 .headerlink,.post-body h3 .header-anchor,.post-body h3 .headerlink,.post-body h4 .header-anchor,.post-body h4 .headerlink,.post-body h5 .header-anchor,.post-body h5 .headerlink,.post-body h6 .header-anchor,.post-body h6 .headerlink{border-bottom-style:none;color:inherit;float:right;font-size:.875em;margin-left:10px;opacity:0}.post-body h1 .header-anchor::before,.post-body h1 .headerlink::before,.post-body h2 .header-anchor::before,.post-body h2 .headerlink::before,.post-body h3 .header-anchor::before,.post-body h3 .headerlink::before,.post-body h4 .header-anchor::before,.post-body h4 .headerlink::before,.post-body h5 .header-anchor::before,.post-body h5 .headerlink::before,.post-body h6 .header-anchor::before,.post-body h6 .headerlink::before{content:'\f0c1';font-family:'Font Awesome 6 Free';font-weight:900}.post-body h1:hover .header-anchor,.post-body h1:hover .headerlink,.post-body h2:hover .header-anchor,.post-body h2:hover .headerlink,.post-body h3:hover .header-anchor,.post-body h3:hover .headerlink,.post-body h4:hover .header-anchor,.post-body h4:hover .headerlink,.post-body h5:hover .header-anchor,.post-body h5:hover .headerlink,.post-body h6:hover .header-anchor,.post-body h6:hover .headerlink{opacity:.5}.post-body h1:hover .header-anchor:hover,.post-body h1:hover .headerlink:hover,.post-body h2:hover .header-anchor:hover,.post-body h2:hover .headerlink:hover,.post-body h3:hover .header-anchor:hover,.post-body h3:hover .headerlink:hover,.post-body h4:hover .header-anchor:hover,.post-body h4:hover .headerlink:hover,.post-body h5:hover .header-anchor:hover,.post-body h5:hover .headerlink:hover,.post-body h6:hover .header-anchor:hover,.post-body h6:hover .headerlink:hover{opacity:1}.post-body .exturl .fa{font-size:.875em;margin-left:4px}.post-body .fancybox+figcaption,.post-body .image-caption,.post-body img+figcaption{color:#999;font-size:.875em;font-weight:700;line-height:1;margin:-15px auto 15px;text-align:center}.post-body embed,.post-body iframe,.post-body img,.post-body video{margin-bottom:20px}.post-body .video-container{height:0;margin-bottom:20px;overflow:hidden;padding-top:75%;position:relative;width:100%}.post-body .video-container embed,.post-body .video-container iframe,.post-body .video-container object{height:100%;left:0;margin:0;position:absolute;top:0;width:100%}.post-gallery{display:flex;min-height:200px}.post-gallery .post-gallery-image{flex:1}.post-gallery .post-gallery-image:not(:first-child){clip-path:polygon(40px 0,100% 0,100% 100%,0 100%);margin-left:-20px}.post-gallery .post-gallery-image:not(:last-child){margin-right:-20px}.post-gallery .post-gallery-image img{height:100%;object-fit:cover;opacity:1;width:100%}.posts-expand .post-gallery{margin-bottom:60px}.posts-collapse .post-gallery{margin:15px 0}.posts-expand .post-header{font-size:1.125em;margin-bottom:60px;text-align:center}.posts-expand .post-title{font-size:1.5em;font-weight:400;margin:initial;overflow-wrap:break-word}.posts-expand .post-title-link{border-bottom:0;color:var(--link-color);display:inline-block;position:relative}.posts-expand .post-title-link::before{background:var(--link-color);bottom:0;content:'';height:2px;left:0;position:absolute;transform:scaleX(0);transition:transform .2s ease-in-out;width:100%}.posts-expand .post-title-link:hover::before{transform:scaleX(1)}.posts-expand .post-title-link .fa-external-link-alt{font-size:.875em;margin-left:5px}.post-sticky-flag{display:inline-block;margin-right:8px;transform:rotate(30deg)}.posts-expand .post-meta-container{color:#999;font-family:Lato,'PingFang SC','Microsoft YaHei',sans-serif;font-size:.75em;margin-top:3px}.posts-expand .post-meta-container .post-description{font-size:.875em;margin-top:2px}.posts-expand .post-meta-container time{border-bottom:1px dashed #999}.post-meta{display:flex;flex-wrap:wrap;justify-content:center}:not(.post-meta-break)+.post-meta-item::before{content:'|';margin:0 .5em}.post-meta-item-icon{margin-right:3px}@media (max-width:991px){.back-to-top{right:20px;opacity:.8}.post-body{text-align:justify}.post-meta-item-text{display:none}}.post-meta-break{flex-basis:100%;height:0}#busuanzi_container_page_pv{display:none}.post-nav{border-top:1px solid #eee;display:flex;gap:30px;justify-content:space-between;margin-top:1em;padding:10px 5px 0}.post-nav-item{flex:1}.post-nav-item a{border-bottom:0;display:block;font-size:.875em;line-height:1.6}.post-nav-item a:active{top:2px}.post-nav-item .fa{font-size:.75em}.post-nav-item:first-child .fa{margin-right:5px}.post-nav-item:last-child{text-align:right}.post-nav-item:last-child .fa{margin-left:5px}.post-footer{display:flex;flex-direction:column;justify-content:center}.post-eof{background:#ccc;height:1px;margin:80px auto 60px;width:8%}.post-block:last-of-type .post-eof{display:none}.post-copyright ul{list-style:none;overflow:hidden;padding:.5em 1em;position:relative;background:var(--card-bg-color);border-left:3px solid #ff2a2a;margin:1em 0 0}.post-copyright ul::after{content:'\f25e';font-family:'Font Awesome 6 Brands';font-size:200px;opacity:.1;position:absolute;right:-50px;top:-150px}.post-tags{margin-top:40px;text-align:center}.post-tags a{display:inline-block;font-size:.8125em}.post-tags a:not(:last-child){margin-right:10px}.social-like{border-top:1px solid #eee;font-size:.875em;margin-top:1em;padding-top:1em;text-align:center}.reward-container{margin:1em 0 0;padding:1em 0;text-align:center}.reward-container button{background:0 0;color:#fc6423;cursor:pointer;line-height:2;padding:0 15px;border:2px solid #fc6423;border-radius:2px;outline:0;transition:.2s ease-in-out;vertical-align:text-top}.reward-container button:hover{background:#fc6423;color:#fff}.post-reward{display:none;padding-top:20px}.post-reward.active{display:block}.post-reward div{display:inline-block}.post-reward div span{display:block}.post-reward img{display:inline-block;margin:.8em 2em 0;max-width:100%;width:180px}@keyframes next-roll{from{transform:rotateZ(30deg)}to{transform:rotateZ(-30deg)}}.category-all-page .category-all-title{text-align:center}.category-all-page .category-all{margin-top:20px}.category-all-page .category-list{list-style:none;margin:0;padding:0}.category-all-page .category-list-item{margin:5px 10px}.category-all-page .category-list-count{color:#bbb}.category-all-page .category-list-count::before{content:' ('}.category-all-page .category-list-count::after{content:') '}.category-all-page .category-list-child{padding-left:10px}.event-list hr{background:#222;margin:20px 0 45px}.event-list hr::after{background:#222;color:#fff;content:'NOW';display:inline-block;font-weight:700;padding:0 5px}.event-list .event{--event-background:#222;--event-foreground:#bbb;--event-title:#fff;background:var(--event-background);padding:15px}.event-list .event .event-summary{border-bottom:0;color:var(--event-title);margin:0;padding:0 0 0 35px;position:relative}.event-list .event .event-summary::before{animation:1s ease-in-out infinite alternate dot-flash;background:var(--event-title);left:0;margin-top:-6px;position:absolute;top:50%;border-radius:50%;content:' ';height:12px;width:12px}.event-list .event:nth-of-type(odd) .event-summary::before{animation-delay:.5s}.event-list .event:not(:last-child){margin-bottom:20px}.event-list .event .event-relative-time{color:var(--event-foreground);display:inline-block;font-size:12px;font-weight:400;padding-left:12px}.event-list .event .event-details{color:var(--event-foreground);display:block;line-height:18px;padding:6px 0 6px 35px}.event-list .event .event-details::before{color:var(--event-foreground);display:inline-block;margin-right:9px;width:14px;font-family:'Font Awesome 6 Free';font-weight:900}.event-list .event .event-details.event-location::before{content:'\f041'}.event-list .event .event-details.event-duration::before{content:'\f017'}.event-list .event .event-details.event-description::before{content:'\f024'}.event-list .event-past{--event-background:#f5f5f5;--event-foreground:#999;--event-title:#222}@keyframes dot-flash{from{opacity:1;transform:scale(1)}to{opacity:0;transform:scale(.8)}}ul.breadcrumb{font-size:.75em;list-style:none;margin:1em 0;padding:0 2em;text-align:center}ul.breadcrumb li{display:inline}ul.breadcrumb li:not(:first-child)::before{content:'/\00a0';font-weight:400;padding:.5em}ul.breadcrumb li:last-child{font-weight:700}.tag-cloud{text-align:center}.tag-cloud a{display:inline-block;margin:10px}.tag-cloud-0{border-bottom-color:#aaa;color:#aaa}.tag-cloud-1{border-bottom-color:#9a9a9a;color:#9a9a9a}.tag-cloud-2{border-bottom-color:#8b8b8b;color:#8b8b8b}.tag-cloud-3{border-bottom-color:#7c7c7c;color:#7c7c7c}.tag-cloud-4{border-bottom-color:#6c6c6c;color:#6c6c6c}.tag-cloud-5{border-bottom-color:#5d5d5d;color:#5d5d5d}.tag-cloud-6{border-bottom-color:#4e4e4e;color:#4e4e4e}.tag-cloud-7{border-bottom-color:#3e3e3e;color:#3e3e3e}.tag-cloud-8{border-bottom-color:#2f2f2f;color:#2f2f2f}.tag-cloud-9{border-bottom-color:#202020;color:#202020}.tag-cloud-10{border-bottom-color:#111;color:#111}.search-active{overflow:hidden}.search-pop-overlay{background:rgba(0,0,0,0);display:flex;height:100%;left:0;position:fixed;top:0;transition:visibility .4s,background .4s;visibility:hidden;width:100%;z-index:40}.search-active .search-pop-overlay{background:rgba(0,0,0,.3);visibility:visible}.search-popup{background:var(--card-bg-color);border-radius:5px;height:80%;margin:auto;transform:scale(0);transition:transform .4s;width:700px}.search-active .search-popup{transform:scale(1)}@media (max-width:767px){.search-popup{border-radius:0;height:100%;width:100%}}.search-popup .popup-btn-close,.search-popup .search-icon{color:#999;font-size:18px;padding:0 10px}.search-popup .popup-btn-close{cursor:pointer}.search-popup .popup-btn-close:hover .fa{color:#222}.search-popup .search-header{background:#eee;border-top-left-radius:5px;border-top-right-radius:5px;display:flex;padding:5px}.search-popup input.search-input{background:0 0;border:0;outline:0;width:100%}.search-popup input.search-input::-webkit-search-cancel-button{display:none}.search-popup .search-result-container{height:calc(100% - 55px);overflow:auto;padding:5px 25px}.search-popup .search-result-container hr{margin:5px 0 10px}.search-popup .search-result-container hr:first-child{display:none}.search-popup .search-result-list{margin:0 5px;padding:0}.search-popup a.search-result-title{font-weight:700}.search-popup p.search-result{border-bottom:1px dashed #ccc;padding:5px 0}.search-input-container{flex-grow:1}.search-input-container form{padding:2px}.search-stats{align-items:center;display:flex;justify-content:space-between}.search-stats img{height:1em;margin:0}.algolia-pagination{margin:40px 0;opacity:1;padding:0}.algolia-pagination .pagination-item{display:inline-block}.algolia-pagination .current .page-number{cursor:default}.algolia-pagination .disabled-item{visibility:hidden}.use-motion .animated{animation-fill-mode:none;visibility:inherit}.use-motion .sidebar .animated{animation-fill-mode:both}.header{background:var(--content-bg-color);border-radius:initial;box-shadow:initial}.main{align-items:stretch;display:flex;justify-content:space-between;margin:0 auto;width:calc(100% - 20px)}@media (max-width:767px){.main{width:auto}}@media (min-width:1200px){.main{width:1160px}}@media (min-width:1600px){.main{width:73%}}@media (max-width:991px){.header{border-radius:initial}.main{display:block;width:auto}}.main-inner{border-radius:initial;box-sizing:border-box;width:calc(100% - 252px)}.footer-inner{padding-left:252px}@media (max-width:991px){.main-inner{border-radius:initial;width:100%}.footer-inner{padding-left:0;padding-right:0;width:auto}}.column{width:240px}.site-brand-container{background:var(--theme-color)}.site-meta{padding:20px 0}.site-nav-right .toggle,.site-nav-toggle .toggle{color:#fff}.site-nav-right .toggle .toggle-line,.site-nav-toggle .toggle .toggle-line{background:#fff}@media (min-width:768px) and (max-width:991px){.site-nav-right,.site-nav-toggle{display:flex;flex-direction:column;justify-content:center}.site-nav{--scroll-height:0;height:0;overflow:hidden;transition:height .2s ease-in-out}body:not(.site-nav-on) .site-nav .animated{animation:none}body.site-nav-on .site-nav{height:var(--scroll-height)}}.menu .menu-item{display:block;margin:0}.menu .menu-item a{padding:5px 20px;position:relative;text-align:left;transition-property:background-color}.menu .menu-item .badge{background:#ccc;border-radius:10px;color:var(--content-bg-color);float:right;padding:2px 5px;text-shadow:1px 1px 0 rgba(0,0,0,.1)}.main-menu .menu-item-active::after{background:#bbb;border-radius:50%;content:' ';height:6px;margin-top:-3px;position:absolute;right:15px;top:50%;width:6px}.sub-menu{margin:0;padding:6px 0}.sub-menu .menu-item{display:inline-block}.sub-menu .menu-item a{background:0 0;margin:5px 10px;padding:initial}.sub-menu .menu-item a:hover{background:0 0;color:#fc6423}.sub-menu .menu-item-active{border-bottom-color:#fc6423;color:#fc6423}.sub-menu .menu-item-active:hover{border-bottom-color:#fc6423}.sidebar{position:-webkit-sticky;position:sticky;top:12px}@media (max-width:991px){.column{width:auto}.site-nav-on .site-brand-container{box-shadow:0 0 16px rgba(0,0,0,.5)}.menu .menu-item.menu-item-search,.sidebar{display:none}}.sidebar-inner{background:var(--content-bg-color);border-radius:initial;box-shadow:initial;box-sizing:border-box;color:var(--text-color);margin-top:12px;max-height:calc(100vh - 24px);visibility:hidden}.site-state-item{padding:0 10px}.sidebar .sidebar-button{border-bottom:1px dotted #ccc;border-top:1px dotted #ccc}.sidebar .sidebar-button button{border:0;color:#fc6423;display:block;width:100%}.sidebar .sidebar-button button:hover{background:0 0;border:0;color:#e34603}.links-of-author{display:flex;flex-wrap:wrap;justify-content:center}.links-of-author-item{margin:5px 0 0;width:50%}.links-of-author-item a{box-sizing:border-box;max-width:100%;overflow:hidden;padding:0 5px;text-overflow:ellipsis;white-space:nowrap;border-bottom:0;border-radius:4px;display:block}.links-of-author-item a:hover{background:var(--body-bg-color)}.main-inner{background:var(--content-bg-color);box-shadow:initial;padding:40px}@media (max-width:991px){.main-inner{padding:20px}}.sub-menu{border-bottom:1px solid #ddd}.post-block:first-of-type{padding-top:40px}@media (max-width:767px){.pagination{margin-bottom:10px}}</style><link as=style href=https://fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic&display=swap&subset=latin,latin-ext onload=this.rel='stylesheet' rel=preload><link crossorigin=anonymous href=https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.2.1/css/all.min.css integrity=sha256-Z1K5uhUaJXA7Ll0XrZ/0JhX4lAtZFpT6jkKrEDT0drU= rel=stylesheet><link crossorigin=anonymous href=https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.1.1/animate.min.css integrity=sha256-PR7ttpcvz8qrF57fur/yAx1qXMFJeJFiA6pSzWi0OIE= rel=stylesheet><link crossorigin=anonymous href=https://cdnjs.cloudflare.com/ajax/libs/fancybox/3.5.7/jquery.fancybox.min.css integrity=sha256-Vzbj7sDDS/woiFS3uNKo8eIuni59rjyNGtXfstRzStA= rel=stylesheet><script class=next-config data-name=main type=application/json>{"hostname":"nicksxs.me","root":"/","images":"/images","scheme":"Pisces","darkmode":false,"version":"8.14.1","exturl":false,"sidebar":{"position":"left","display":"post","padding":18,"offset":12},"copycode":{"enable":true,"style":"mac"},"bookmark":{"enable":false,"color":"#222","save":"auto"},"mediumzoom":false,"lazyload":true,"pangu":false,"comments":{"style":"tabs","active":null,"storage":true,"lazyload":false,"nav":null},"stickytabs":false,"motion":{"enable":true,"async":false,"transition":{"menu_item":"fadeInDown","post_block":"fadeIn","post_header":"fadeInDown","post_body":"fadeInDown","coll_header":"fadeInLeft","sidebar":"fadeInUp"}},"prism":false,"i18n":{"placeholder":"搜索...","empty":"没有找到任何搜索结果：${query}","hits_time":"找到 ${hits} 个搜索结果（用时 ${time} 毫秒）","hits":"找到 ${hits} 个搜索结果"},"algolia":{"appID":"663Q99OQQD","apiKey":"e461a1371d12cec1491c1153b288a9ed","indexName":"nicksxs","hits":{"per_page":10}}}</script><script src=/js/config.js></script><meta content="learn from zero,技术博客，Nicksxs，史学森" name=description><meta content=website property=og:type><meta content="Nicksxs's Blog" property=og:title><meta content=https://nicksxs.me/page/18/index.html property=og:url><meta content="Nicksxs's Blog" property=og:site_name><meta content="learn from zero,技术博客，Nicksxs，史学森" property=og:description><meta content=zh_CN property=og:locale><meta content=Nicksxs property=article:author><meta content=Nicksxs,史学森,米方方,米方方的男朋友,森哥 property=article:tag><meta content=summary name=twitter:card><link href=https://nicksxs.me/page/18/ rel=canonical><script class=next-config data-name=page type=application/json>{"sidebar":"","isHome":true,"isPost":false,"lang":"zh-CN","comments":"","permalink":"","path":"page/18/index.html","title":""}</script><script class=next-config data-name=calendar type=application/json>""</script><title>Nicksxs's Blog - What hurts more, the pain of hard work or the pain of regret?</title><script async src=https://www.googletagmanager.com/gtag/js?id=UA-61358619-1></script><script class=next-config data-name=google_analytics type=application/json>{"tracking_id":"UA-61358619-1","only_pageview":false}</script><script src=/js/third-party/analytics/google-analytics.js></script><script src=/js/third-party/analytics/baidu-analytics.js></script><script async src=https://hm.baidu.com/hm.js?20f33b3c0c0eff9b1522999c0015646d></script><noscript><link href=/css/noscript.css rel=stylesheet></noscript><link title="Nicksxs's Blog" href=/atom.xml rel=alternate type=application/atom+xml><body class=use-motion itemscope itemtype=http://schema.org/WebPage><div class=headband></div><main class=main><div class=column><header class=header itemscope itemtype=http://schema.org/WPHeader><div class=site-brand-container><div class=site-nav-toggle><div aria-label=切换导航栏 class=toggle role=button><span class=toggle-line></span><span class=toggle-line></span><span class=toggle-line></span></div></div><div class=site-meta><a class=brand href=/ rel=start><i class=logo-line></i><h1 class=site-title>Nicksxs's Blog</h1><i class=logo-line></i></a><p class=site-subtitle itemprop=description>What hurts more, the pain of hard work or the pain of regret?</div><div class=site-nav-right><div class="toggle popup-trigger" aria-label=搜索 role=button><i class="fa fa-search fa-fw fa-lg"></i></div></div></div><nav class=site-nav><ul class="main-menu menu"><li class="menu-item menu-item-home"><a href=/ rel=section><i class="fa fa-home fa-fw"></i>首页</a><li class="menu-item menu-item-about"><a href=/about/ rel=section><i class="fa fa-user fa-fw"></i>关于</a><li class="menu-item menu-item-tags"><a href=/tags/ rel=section><i class="fa fa-tags fa-fw"></i>标签</a><li class="menu-item menu-item-categories"><a href=/categories/ rel=section><i class="fa fa-th fa-fw"></i>分类</a><li class="menu-item menu-item-archives"><a href=/archives/ rel=section><i class="fa fa-archive fa-fw"></i>归档</a><li class="menu-item menu-item-top"><a href=/top/ rel=section><i class="fa fa-th fa-fw"></i>热度</a><li class="menu-item menu-item-sitemap"><a href=/sitemap.xml rel=section><i class="fa fa-sitemap fa-fw"></i>站点地图</a><li class="menu-item menu-item-commonweal"><a href=/404/ rel=section><i class="fa fa-heartbeat fa-fw"></i>公益 404</a><li class="menu-item menu-item-search"><a class=popup-trigger role=button><i class="fa fa-search fa-fw"></i>搜索</a></ul></nav><div class=search-pop-overlay><div class="popup search-popup"><div class=search-header><span class=search-icon><i class="fa fa-search"></i></span><div class=search-input-container></div><span class=popup-btn-close role=button><i class="fa fa-times-circle"></i></span></div><div class=search-result-container><div class=algolia-stats><hr></div><div class=algolia-hits></div><div class=algolia-pagination></div></div></div></div></header><aside class=sidebar><div class="sidebar-inner sidebar-overview-active"><ul class=sidebar-nav><li class=sidebar-nav-toc>文章目录<li class=sidebar-nav-overview>站点概览</ul><div class=sidebar-panel-container><div class="post-toc-wrap sidebar-panel"></div><div class="site-overview-wrap sidebar-panel"><div class="site-author animated" itemprop=author itemscope itemtype=http://schema.org/Person><img alt=Nicksxs class=site-author-image itemprop=image src=/uploads/avatar.jpg><p class=site-author-name itemprop=name>Nicksxs<div class=site-description itemprop=description>learn from zero,技术博客，Nicksxs，史学森</div></div><div class="site-state-wrap animated"><nav class=site-state><div class="site-state-item site-state-posts"><a href=/archives/><span class=site-state-item-count>228</span> <span class=site-state-item-name>日志</span></a></div><div class="site-state-item site-state-categories"><a href=/categories/><span class=site-state-item-count>158</span> <span class=site-state-item-name>分类</span></a></div><div class="site-state-item site-state-tags"><a href=/tags/><span class=site-state-item-count>296</span> <span class=site-state-item-name>标签</span></a></div></nav></div><div class="links-of-author animated"><span class=links-of-author-item><a rel="noopener me" title="GitHub → https://github.com/nicksxs" href=https://github.com/nicksxs target=_blank><i class="fab fa-github fa-fw"></i>GitHub</a> </span><span class=links-of-author-item><a rel="noopener me" title="E-Mail → mailto:nicksxs1202@gmail.com" href=mailto:nicksxs1202@gmail.com target=_blank><i class="fa fa-envelope fa-fw"></i>E-Mail</a></span></div><div class="cc-license animated" itemprop=license><a class=cc-opacity href=https://creativecommons.org/licenses/by-nc-sa/4.0/ rel=noopener target=_blank><img alt="Creative Commons" src=https://cdnjs.cloudflare.com/ajax/libs/creativecommons-vocabulary/2020.11.3/assets/license_badges/small/by_nc_sa.svg></a></div><div class=post-gallery itemscope itemtype=http://schema.org/ImageGallery style=height:120px;min-height:120px><div class=post-gallery-row><a class="post-gallery-img fancybox" href=https://url.cn/LLWrL7gx itemprop=url itemscope itemtype=http://schema.org/ImageObject rel=gallery_ target=_blank><img alt=腾讯云推广 itemprop=contentUrl src=https://img.nicksxs.com/blog/345X200.jpg style=padding:12px></a></div></div><script charset=utf-8 src=/js/tagcloud.js></script><script charset=utf-8 src=/js/tagcanvas.js></script><div class=widget-wrap><div class="widget tagcloud" id=myCanvasContainer><canvas height=250 id=resCanvas width=250><ul class=tag-list itemprop=keywords><li class=tag-list-item><a class=tag-list-link href=/tags/2019/ rel=tag>2019</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/2020/ rel=tag>2020</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/2021/ rel=tag>2021</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/2022/ rel=tag>2022</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/2023/ rel=tag>2023</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/2PC/ rel=tag>2PC</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/360-%E5%85%A8%E5%AE%B6%E6%A1%B6/ rel=tag>360 全家桶</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/3PC/ rel=tag>3PC</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/3Sum-Closest/ rel=tag>3Sum Closest</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/AOP/ rel=tag>AOP</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Adaptive/ rel=tag>Adaptive</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Apollo/ rel=tag>Apollo</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/AutoConfiguration/ rel=tag>AutoConfiguration</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/Binary-Tree/ rel=tag>Binary Tree</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/Broker/ rel=tag>Broker</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/C/ rel=tag>C</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/C/ rel=tag>C++</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/CachedThreadPool/ rel=tag>CachedThreadPool</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Comparator/ rel=tag>Comparator</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/DFS/ rel=tag>DFS</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/DP/ rel=tag>DP</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/DefaultMQPushConsumer/ rel=tag>DefaultMQPushConsumer</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Design-Patterns/ rel=tag>Design Patterns</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Disruptor/ rel=tag>Disruptor</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/Distributed-Lock/ rel=tag>Distributed Lock</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Docker/ rel=tag>Docker</a><span class=tag-list-count>5</span><li class=tag-list-item><a class=tag-list-link href=/tags/Dockerfile/ rel=tag>Dockerfile</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Druid/ rel=tag>Druid</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Dubbo/ rel=tag>Dubbo</a><span class=tag-list-count>6</span><li class=tag-list-item><a class=tag-list-link href=/tags/EagerThreadPool/ rel=tag>EagerThreadPool</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Evict/ rel=tag>Evict</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Filter/ rel=tag>Filter</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/First-Bad-Version/ rel=tag>First Bad Version</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/FixedThreadPool/ rel=tag>FixedThreadPool</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/G1/ rel=tag>G1</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/GC/ rel=tag>GC</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Garbage-First-Collector/ rel=tag>Garbage-First Collector</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Gogs/ rel=tag>Gogs</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Homebrew/ rel=tag>Homebrew</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Inorder-Traversal/ rel=tag>Inorder Traversal</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Interceptor/ rel=tag>Interceptor</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Intersection-of-Two-Arrays/ rel=tag>Intersection of Two Arrays</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/JMap/ rel=tag>JMap</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/JPS/ rel=tag>JPS</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/JStack/ rel=tag>JStack</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/JVM/ rel=tag>JVM</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/Java/ rel=tag>Java</a><span class=tag-list-count>50</span><li class=tag-list-item><a class=tag-list-link href=/tags/Leetcode-42/ rel=tag>Leetcode 42</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/LimitedThreadPool/ rel=tag>LimitedThreadPool</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Linked-List/ rel=tag>Linked List</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/Lowest-Common-Ancestor-of-a-Binary-Tree/ rel=tag>Lowest Common Ancestor of a Binary Tree</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/MQ/ rel=tag>MQ</a><span class=tag-list-count>9</span><li class=tag-list-item><a class=tag-list-link href=/tags/Mac/ rel=tag>Mac</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Maven/ rel=tag>Maven</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Median-of-Two-Sorted-Arrays/ rel=tag>Median of Two Sorted Arrays</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Mybatis/ rel=tag>Mybatis</a><span class=tag-list-count>13</span><li class=tag-list-item><a class=tag-list-link href=/tags/Mysql/ rel=tag>Mysql</a><span class=tag-list-count>13</span><li class=tag-list-item><a class=tag-list-link href=/tags/NameServer/ rel=tag>NameServer</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/PHP/ rel=tag>PHP</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Preorder-Traversal/ rel=tag>Preorder Traversal</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Print-FooBar-Alternately/ rel=tag>Print FooBar Alternately</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/RPC/ rel=tag>RPC</a><span class=tag-list-count>4</span><li class=tag-list-item><a class=tag-list-link href=/tags/Redis/ rel=tag>Redis</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/Remove-Duplicates-from-Sorted-List/ rel=tag>Remove Duplicates from Sorted List</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/RocketMQ/ rel=tag>RocketMQ</a><span class=tag-list-count>9</span><li class=tag-list-item><a class=tag-list-link href=/tags/Rotate-Image/ rel=tag>Rotate Image</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Rust/ rel=tag>Rust</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/SPI/ rel=tag>SPI</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/Servlet/ rel=tag>Servlet</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Sharding-Jdbc/ rel=tag>Sharding-Jdbc</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/Shift-2D-Grid/ rel=tag>Shift 2D Grid</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Singleton/ rel=tag>Singleton</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Spring/ rel=tag>Spring</a><span class=tag-list-count>7</span><li class=tag-list-item><a class=tag-list-link href=/tags/Spring-Event/ rel=tag>Spring Event</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/SpringBoot/ rel=tag>SpringBoot</a><span class=tag-list-count>10</span><li class=tag-list-item><a class=tag-list-link href=/tags/Sql%E6%B3%A8%E5%85%A5/ rel=tag>Sql注入</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Stream/ rel=tag>Stream</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Synchronized/ rel=tag>Synchronized</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/Thread-dump/ rel=tag>Thread dump</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/ThreadLocal/ rel=tag>ThreadLocal</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/ThreadPool/ rel=tag>ThreadPool</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Tomcat/ rel=tag>Tomcat</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Trapping-Rain-Water/ rel=tag>Trapping Rain Water</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/WeakReference/ rel=tag>WeakReference</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Web/ rel=tag>Web</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Webhook/ rel=tag>Webhook</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/Windows/ rel=tag>Windows</a><span class=tag-list-count>4</span><li class=tag-list-item><a class=tag-list-link href=/tags/WordPress/ rel=tag>WordPress</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/aqs/ rel=tag>aqs</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/await/ rel=tag>await</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/bloom-filter/ rel=tag>bloom filter</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/c/ rel=tag>c++</a><span class=tag-list-count>14</span><li class=tag-list-item><a class=tag-list-link href=/tags/cglib/ rel=tag>cglib</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/cgroup/ rel=tag>cgroup</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/cluster/ rel=tag>cluster</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/condition/ rel=tag>condition</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/dnsmasq/ rel=tag>dnsmasq</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/docker/ rel=tag>docker</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/dp/ rel=tag>dp</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/dubbo/ rel=tag>dubbo</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/echo/ rel=tag>echo</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/environment/ rel=tag>environment</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/gap-lock/ rel=tag>gap lock</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/gc/ rel=tag>gc</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/git/ rel=tag>git</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/grep/ rel=tag>grep</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/hadoop/ rel=tag>hadoop</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/headscale/ rel=tag>headscale</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/hexo/ rel=tag>hexo</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/icu4c/ rel=tag>icu4c</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/im/ rel=tag>im</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/is-not-null/ rel=tag>is not null</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/is-null/ rel=tag>is null</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/j-u-c/ rel=tag>j.u.c</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/java/ rel=tag>java</a><span class=tag-list-count>35</span><li class=tag-list-item><a class=tag-list-link href=/tags/jvm/ rel=tag>jvm</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/leetcode/ rel=tag>leetcode</a><span class=tag-list-count>40</span><li class=tag-list-item><a class=tag-list-link href=/tags/leetcode-155/ rel=tag>leetcode 155</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/linked-list/ rel=tag>linked list</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/linux/ rel=tag>linux</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/lock/ rel=tag>lock</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/mfc/ rel=tag>mfc</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/min-stack/ rel=tag>min stack</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/mq/ rel=tag>mq</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/mvcc/ rel=tag>mvcc</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/mysql/ rel=tag>mysql</a><span class=tag-list-count>6</span><li class=tag-list-item><a class=tag-list-link href=/tags/namespace/ rel=tag>namespace</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/nas/ rel=tag>nas</a><span class=tag-list-count>6</span><li class=tag-list-item><a class=tag-list-link href=/tags/next-key-lock/ rel=tag>next-key lock</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/nginx/ rel=tag>nginx</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/nullsfirst/ rel=tag>nullsfirst</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/openresty/ rel=tag>openresty</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/php/ rel=tag>php</a><span class=tag-list-count>4</span><li class=tag-list-item><a class=tag-list-link href=/tags/powershell/ rel=tag>powershell</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/procedure/ rel=tag>procedure</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/python/ rel=tag>python</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/read-view/ rel=tag>read view</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/redis/ rel=tag>redis</a><span class=tag-list-count>12</span><li class=tag-list-item><a class=tag-list-link href=/tags/scp/ rel=tag>scp</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/signal/ rel=tag>signal</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/sort/ rel=tag>sort</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/spark/ rel=tag>spark</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/ssh/ rel=tag>ssh</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/stack/ rel=tag>stack</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/stream/ rel=tag>stream</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/string/ rel=tag>string</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/swoole/ rel=tag>swoole</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/top/ rel=tag>top</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/uname/ rel=tag>uname</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/unlock/ rel=tag>unlock</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/utf8/ rel=tag>utf8</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/utf8mb4/ rel=tag>utf8mb4</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/utf8mb4-0900-ai-ci/ rel=tag>utf8mb4_0900_ai_ci</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/utf8mb4-general-ci/ rel=tag>utf8mb4_general_ci</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/utf8mb4-unicode-ci/ rel=tag>utf8mb4_unicode_ci</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/value/ rel=tag>value</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/websocket/ rel=tag>websocket</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/windows/ rel=tag>windows</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/wsl/ rel=tag>wsl</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/zookeeper/ rel=tag>zookeeper</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/zsh/ rel=tag>zsh</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E4%B8%89%E9%98%B6%E6%AE%B5%E6%8F%90%E4%BA%A4/ rel=tag>三阶段提交</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E4%B8%8D%E5%8F%AF%E5%8F%98%E5%BC%95%E7%94%A8/ rel=tag>不可变引用</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E4%B8%9C%E4%BA%AC%E5%A5%A5%E8%BF%90%E4%BC%9A/ rel=tag>东京奥运会</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E4%B8%A4%E9%98%B6%E6%AE%B5%E6%8F%90%E4%BA%A4/ rel=tag>两阶段提交</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E4%B8%AD%E5%B1%B1%E8%B7%AF/ rel=tag>中山路</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E4%B8%AD%E5%BA%8F/ rel=tag>中序</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E4%B8%AD%E9%97%B4%E4%BB%B6/ rel=tag>中间件</a><span class=tag-list-count>4</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E4%B8%BE%E9%87%8D/ rel=tag>举重</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E4%B9%92%E4%B9%93%E7%90%83/ rel=tag>乒乓球</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E4%BA%8B%E5%8A%A1/ rel=tag>事务</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E4%BA%8C%E5%8F%89%E6%A0%91/ rel=tag>二叉树</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E4%BA%92%E6%96%A5%E9%94%81/ rel=tag>互斥锁</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E4%BB%A3%E7%A0%81%E9%A2%98%E8%A7%A3/ rel=tag>代码题解</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E4%BF%AE%E7%94%B5%E8%84%91%E7%9A%84/ rel=tag>修电脑的</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%81%8F%E5%90%91%E9%94%81/ rel=tag>偏向锁</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%81%A5%E5%BA%B7%E7%A0%81/ rel=tag>健康码</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%85%AC%E4%BA%A4/ rel=tag>公交</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%85%AC%E4%BA%A4%E8%BD%A6/ rel=tag>公交车</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%86%85%E5%AD%98%E5%88%86%E5%B8%83/ rel=tag>内存分布</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%86%85%E5%AD%98%E6%B3%84%E6%BC%8F/ rel=tag>内存泄漏</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%87%86%E5%A4%87/ rel=tag>准备</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%87%8F%E8%82%A5/ rel=tag>减肥</a><span class=tag-list-count>7</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%88%86%E5%B8%83%E5%BC%8F%E4%BA%8B%E5%8A%A1/ rel=tag>分布式事务</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%88%86%E5%B8%83%E5%BC%8F%E9%94%81/ rel=tag>分布式锁</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%88%87%E7%89%87/ rel=tag>切片</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%88%9D%E5%A7%8B%E5%8C%96/ rel=tag>初始化</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%89%8A%E5%B3%B0%E5%A1%AB%E8%B0%B7/ rel=tag>削峰填谷</a><span class=tag-list-count>4</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%89%8D%E5%BA%8F/ rel=tag>前序</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%8A%A0%E5%A1%9E/ rel=tag>加塞</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%8A%A0%E8%BD%BD/ rel=tag>加载</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%8D%95%E4%BE%8B/ rel=tag>单例</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%8D%9A%E5%AE%A2%EF%BC%8C%E6%96%87%E7%AB%A0/ rel=tag>博客，文章</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%8E%A6%E9%97%A8/ rel=tag>厦门</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%8F%8C%E4%BA%B2%E5%A7%94%E6%B4%BE/ rel=tag>双亲委派</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%8F%91%E8%A1%8C%E7%89%88/ rel=tag>发行版</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%8F%A3%E7%BD%A9/ rel=tag>口罩</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%8F%AF%E5%8F%98%E5%BC%95%E7%94%A8/ rel=tag>可变引用</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%90%90%E6%A7%BD/ rel=tag>吐槽</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%9B%A4%E7%89%A9%E8%B5%84/ rel=tag>囤物资</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%9E%83%E5%9C%BE%E5%9B%9E%E6%94%B6/ rel=tag>垃圾回收</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%9F%BA%E7%A1%80%E8%AE%BE%E6%96%BD/ rel=tag>基础设施</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%A4%A7%E6%89%AB%E9%99%A4/ rel=tag>大扫除</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%AD%97%E7%AC%A6%E9%9B%86/ rel=tag>字符集</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%AE%89%E5%85%A8/ rel=tag>安全</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%AE%B9%E9%94%99%E6%9C%BA%E5%88%B6/ rel=tag>容错机制</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%AF%84%E7%94%9F%E8%99%AB/ rel=tag>寄生虫</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%B0%84%E5%87%BB/ rel=tag>射击</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%B0%8F%E6%8A%80%E5%B7%A7/ rel=tag>小技巧</a><span class=tag-list-count>6</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%B1%80%E5%8F%A3%E8%A1%97/ rel=tag>局口街</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%B8%83%E9%9A%86%E8%BF%87%E6%BB%A4%E5%99%A8/ rel=tag>布隆过滤器</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%B9%B2%E6%B4%BB/ rel=tag>干活</a><span class=tag-list-count>6</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%B9%B4%E4%B8%AD%E6%80%BB%E7%BB%93/ rel=tag>年中总结</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%B9%B4%E7%BB%88%E6%80%BB%E7%BB%93/ rel=tag>年终总结</a><span class=tag-list-count>4</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%B9%B6%E5%8F%91/ rel=tag>并发</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%B9%B8%E7%A6%8F%E4%BA%86%E5%90%97/ rel=tag>幸福了吗</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%B9%BB%E8%AF%BB/ rel=tag>幻读</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%BA%94%E7%94%A8/ rel=tag>应用</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%BC%80%E8%BD%A6/ rel=tag>开车</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%BC%B1%E5%BC%95%E7%94%A8/ rel=tag>弱引用</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E5%BD%B1%E8%AF%84/ rel=tag>影评</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%89%80%E6%9C%89%E6%9D%83/ rel=tag>所有权</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%89%93%E5%8D%A1/ rel=tag>打卡</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%89%B6%E6%A2%AF/ rel=tag>扶梯</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%8A%80%E6%9C%AF/ rel=tag>技术</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%8B%96%E6%9B%B4/ rel=tag>拖更</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%8D%A2%E8%BD%A6%E7%89%8C/ rel=tag>换车牌</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%8E%92%E5%BA%8F/ rel=tag>排序</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%8E%A5%E9%9B%A8%E6%B0%B4/ rel=tag>接雨水</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%95%B0%E6%8D%AE%E6%BA%90%E5%8A%A8%E6%80%81%E5%88%87%E6%8D%A2/ rel=tag>数据源动态切换</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84/ rel=tag>数据结构</a><span class=tag-list-count>11</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%96%B0%E8%AF%AD%E8%A8%80/ rel=tag>新语言</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%97%85%E6%B8%B8/ rel=tag>旅游</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%97%A5%E5%BF%97/ rel=tag>日志</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%9B%BE%E5%8E%9D%E5%9E%B5/ rel=tag>曾厝垵</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%9C%80%E5%B0%8F%E6%A0%88/ rel=tag>最小栈</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%9D%80%E4%BA%BA%E8%AF%9B%E5%BF%83/ rel=tag>杀人诛心</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%9D%AD%E5%B7%9E/ rel=tag>杭州</a><span class=tag-list-count>4</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%A0%87%E8%AE%B0%E6%95%B4%E7%90%86/ rel=tag>标记整理</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%A4%8D%E7%89%A9%E5%9B%AD/ rel=tag>植物园</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%B2%99%E8%8C%B6%E9%9D%A2/ rel=tag>沙茶面</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%B3%A8%E8%A7%A3/ rel=tag>注解</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%B5%B7%E8%9B%8E%E7%85%8E/ rel=tag>海蛎煎</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97/ rel=tag>消息队列</a><span class=tag-list-count>9</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%B7%98%E6%B1%B0%E7%AD%96%E7%95%A5/ rel=tag>淘汰策略</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%B7%B1%E5%BA%A6%E5%AD%A6%E4%B9%A0/ rel=tag>深度学习</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%BA%90%E7%A0%81/ rel=tag>源码</a><span class=tag-list-count>11</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90/ rel=tag>源码解析</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%94%9F%E6%B4%BB/ rel=tag>生活</a><span class=tag-list-count>42</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%94%B5%E7%93%B6%E8%BD%A6/ rel=tag>电瓶车</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%96%AB%E6%83%85/ rel=tag>疫情</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%9C%8B%E4%B9%A6/ rel=tag>看书</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%9C%8B%E5%89%A7/ rel=tag>看剧</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%9F%A9%E9%98%B5/ rel=tag>矩阵</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%AB%AF%E5%8F%A3%E8%BD%AC%E5%8F%91/ rel=tag>端口转发</a><span class=tag-list-count>3</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%B1%BB%E5%8A%A0%E8%BD%BD/ rel=tag>类加载</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%B3%9F%E5%BF%83%E4%BA%8B/ rel=tag>糟心事</a><span class=tag-list-count>5</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%B4%A2%E5%BC%95/ rel=tag>索引</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%BA%BF%E7%A8%8B%E6%B1%A0/ rel=tag>线程池</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%BC%93%E5%AD%98/ rel=tag>缓存</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%BC%93%E5%AD%98%E5%87%BB%E7%A9%BF/ rel=tag>缓存击穿</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%BC%93%E5%AD%98%E7%A9%BF%E9%80%8F/ rel=tag>缓存穿透</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%BC%93%E5%AD%98%E9%9B%AA%E5%B4%A9/ rel=tag>缓存雪崩</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%BC%96%E7%A0%81/ rel=tag>编码</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E7%BE%8E%E5%9B%BD/ rel=tag>美国</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%80%81%E7%94%B5%E8%84%91/ rel=tag>老电脑</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%87%AA%E5%8A%A8%E8%A3%85%E9%85%8D/ rel=tag>自动装配</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%87%AA%E6%97%8B/ rel=tag>自旋</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%87%AA%E9%80%82%E5%BA%94%E6%8B%93%E5%B1%95/ rel=tag>自适应拓展</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%A3%85%E7%94%B5%E8%84%91/ rel=tag>装电脑</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%A7%84%E5%88%99/ rel=tag>规则</a><span class=tag-list-count>4</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%A7%A3%E6%9E%90/ rel=tag>解析</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%AE%BE%E8%AE%A1%E6%A8%A1%E5%BC%8F/ rel=tag>设计模式</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%AF%BB%E4%B9%A6/ rel=tag>读书</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%AF%BB%E5%90%8E%E6%84%9F/ rel=tag>读后感</a><span class=tag-list-count>4</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%B4%9F%E8%BD%BD%E5%9D%87%E8%A1%A1/ rel=tag>负载均衡</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%B6%B3%E7%90%83/ rel=tag>足球</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%B7%91%E6%AD%A5/ rel=tag>跑步</a><span class=tag-list-count>7</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%B7%AF%E6%94%BF%E8%A7%84%E5%88%92/ rel=tag>路政规划</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%B7%AF%E7%94%B1%E5%99%A8/ rel=tag>路由器</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%B7%B3%E6%B0%B4/ rel=tag>跳水</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%B8%A9%E8%B8%8F/ rel=tag>踩踏</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%BD%AC%E4%B9%89/ rel=tag>转义</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%BD%BB%E9%87%8F%E7%BA%A7%E9%94%81/ rel=tag>轻量级锁</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%BF%87%E6%9C%9F%E7%AD%96%E7%95%A5/ rel=tag>过期策略</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%BF%90%E5%8A%A8/ rel=tag>运动</a><span class=tag-list-count>9</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E8%BF%9C%E7%A8%8B%E5%8A%9E%E5%85%AC/ rel=tag>远程办公</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E9%80%92%E5%BD%92/ rel=tag>递归</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E9%87%8D%E9%87%8F%E7%BA%A7%E9%94%81/ rel=tag>重量级锁</a><span class=tag-list-count>2</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E9%93%BE%E6%8E%A5/ rel=tag>链接</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E9%A2%98%E8%A7%A3/ rel=tag>题解</a><span class=tag-list-count>24</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E9%A9%AC%E6%88%8F%E5%9B%A2/ rel=tag>马戏团</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E9%AA%8C%E8%AF%81/ rel=tag>验证</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E9%AA%91%E8%BD%A6/ rel=tag>骑车</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E9%AB%98%E9%80%9F/ rel=tag>高速</a><span class=tag-list-count>1</span><li class=tag-list-item><a class=tag-list-link href=/tags/%E9%BC%93%E6%B5%AA%E5%B1%BF/ rel=tag>鼓浪屿</a><span class=tag-list-count>1</span></ul></canvas></div></div></div></div></div><div class="sidebar-inner sidebar-blogroll"><div class="links-of-blogroll animated"><div class=links-of-blogroll-title><i class="fa fa-globe fa-fw"></i> 链接</div><ul class=links-of-blogroll-list><li class=links-of-blogroll-item><a href=https://covermusic.cn/ rel=noopener target=_blank title=https://covermusic.cn>69伙伴</a></ul></div></div></aside></div><div class="main-inner index posts-expand"><div class=post-block><article class=post-content itemscope itemtype=http://schema.org/Article><link href=https://nicksxs.me/2022/02/06/%E5%88%86%E4%BA%AB%E8%AE%B0%E5%BD%95%E4%B8%80%E4%B8%8B%E4%B8%80%E4%B8%AA-git-%E6%93%8D%E4%BD%9C%E6%96%B9%E6%B3%95/ itemprop=mainEntityOfPage><span hidden itemprop=author itemscope itemtype=http://schema.org/Person><meta content=/uploads/avatar.jpg itemprop=image><meta content=Nicksxs itemprop=name></span><span hidden itemprop=publisher itemscope itemtype=http://schema.org/Organization><meta content="Nicksxs's Blog" itemprop=name><meta content="learn from zero,技术博客，Nicksxs，史学森" itemprop=description></span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork><meta content="undefined | Nicksxs's Blog" itemprop=name><meta itemprop=description></span><header class=post-header><h2 itemprop="name headline" class=post-title><a class=post-title-link href=/2022/02/06/%E5%88%86%E4%BA%AB%E8%AE%B0%E5%BD%95%E4%B8%80%E4%B8%8B%E4%B8%80%E4%B8%AA-git-%E6%93%8D%E4%BD%9C%E6%96%B9%E6%B3%95/ itemprop=url>分享记录一下一个 git 操作方法</a></h2><div class=post-meta-container><div class=post-meta><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-calendar"></i> </span><span class=post-meta-item-text>发表于</span> <time itemprop="dateCreated datePublished" title="创建时间：2022-02-06 21:14:58" datetime=2022-02-06T21:14:58+08:00>2022-02-06</time> </span><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-calendar-check"></i> </span><span class=post-meta-item-text>更新于</span> <time title="修改时间：2022-06-11 22:45:11" datetime=2022-06-11T22:45:11+08:00 itemprop=dateModified>2022-06-11</time> </span><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-folder"></i> </span><span class=post-meta-item-text>分类于</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing><a href=/categories/git/ itemprop=url rel=index><span itemprop=name>git</span></a> </span>， <span itemprop=about itemscope itemtype=http://schema.org/Thing><a href=/categories/git/%E5%B0%8F%E6%8A%80%E5%B7%A7/ itemprop=url rel=index><span itemprop=name>小技巧</span></a> </span></span><span class="post-meta-item leancloud_visitors" data-flag-title="分享记录一下一个 git 操作方法" id=/2022/02/06/%E5%88%86%E4%BA%AB%E8%AE%B0%E5%BD%95%E4%B8%80%E4%B8%8B%E4%B8%80%E4%B8%AA-git-%E6%93%8D%E4%BD%9C%E6%96%B9%E6%B3%95/ title=阅读次数><span class=post-meta-item-icon><i class="far fa-eye"></i> </span><span class=post-meta-item-text>阅读次数：</span> <span class=leancloud-visitors-count></span> </span><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-comment"></i> </span><span class=post-meta-item-text>Disqus：</span> <a href=/2022/02/06/%E5%88%86%E4%BA%AB%E8%AE%B0%E5%BD%95%E4%B8%80%E4%B8%8B%E4%B8%80%E4%B8%AA-git-%E6%93%8D%E4%BD%9C%E6%96%B9%E6%B3%95/#disqus_thread itemprop=discussionUrl title=disqus><span class="post-comments-count disqus-comment-count" data-disqus-identifier=2022/02/06/分享记录一下一个-git-操作方法/ itemprop=commentCount></span></a></span></div></div></header><div class=post-body itemprop=articleBody><p>前阵子一个同事因为发现某个分支上的代码好像有缺失导致无法正常运行，然后就对比了下把缺失的代码从另一个分支上拷了过来，可能有所欠考虑，不过主要是说下操作过程和最后的处理方法，这位同学的操作是改一些代码commit 一下，这样的 commit 了大概五六次，并且已经 push 到了远端，然后就在想要怎么去处理，在本地可以 reset，已经到远端了，一个很不优雅的操作就是本地 reset 了用 force push，这个当然是不可取的，然后就是 revert 了，但是又已经 commit 了好几次了，网上看了下，好像处理方法还挺成熟的，git revert 命令本质上就是一个逆向的 git cherry-pick 操作。 它将你提交中的变更的以完全相反的方式的应用到一个新创建的提交中，本质上就是撤销或者倒转。可以理解为就是提交一个反向的操作，这里其实我们可以用<code>range revert</code>来进行 <code>git revert</code>, 用法就是<pre class="line-numbers language-bash" data-language=bash><code class=language-bash><span class="token function">git</span> revert OLDER_COMMIT^<span class="token punctuation">..</span>NEWER_COMMIT<span aria-hidden=true class=line-numbers-rows><span></span></span></code></pre><p>这样就可以解决上面的问题了，但是还有个问题是这样会根据前面的 commit 数量提交对应数量个 revert commit 会显得比较乱，如果要比较干净的 commit 历史，<br>可以看下 <code>git revert</code> 命令说明<br><img data-src=https://img.nicksxs.com/uPic/3nmnwY.png><br>然后就可以用 <code>-n</code> 参数，表示不自动提交<pre class="line-numbers language-bash" data-language=bash><code class=language-bash><span class="token function">git</span> revert <span class="token parameter variable">-n</span> OLDER_COMMIT^<span class="token punctuation">..</span>NEWER_COMMIT
|
|
<span class="token function">git</span> commit <span class="token parameter variable">-m</span> <span class="token string">"revert OLDER_COMMIT to NEWER_COMMIT"</span><span aria-hidden=true class=line-numbers-rows><span></span><span></span></span></code></pre></div><footer class=post-footer><div class=post-eof></div></footer></article></div><div class=post-block><article class=post-content itemscope itemtype=http://schema.org/Article><link href=https://nicksxs.me/2022/01/30/spring-event-%E4%BB%8B%E7%BB%8D/ itemprop=mainEntityOfPage><span hidden itemprop=author itemscope itemtype=http://schema.org/Person><meta content=/uploads/avatar.jpg itemprop=image><meta content=Nicksxs itemprop=name></span><span hidden itemprop=publisher itemscope itemtype=http://schema.org/Organization><meta content="Nicksxs's Blog" itemprop=name><meta content="learn from zero,技术博客，Nicksxs，史学森" itemprop=description></span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork><meta content="undefined | Nicksxs's Blog" itemprop=name><meta itemprop=description></span><header class=post-header><h2 itemprop="name headline" class=post-title><a class=post-title-link href=/2022/01/30/spring-event-%E4%BB%8B%E7%BB%8D/ itemprop=url>spring event 介绍</a></h2><div class=post-meta-container><div class=post-meta><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-calendar"></i> </span><span class=post-meta-item-text>发表于</span> <time itemprop="dateCreated datePublished" title="创建时间：2022-01-30 21:51:03" datetime=2022-01-30T21:51:03+08:00>2022-01-30</time> </span><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-calendar-check"></i> </span><span class=post-meta-item-text>更新于</span> <time title="修改时间：2022-06-11 22:45:11" datetime=2022-06-11T22:45:11+08:00 itemprop=dateModified>2022-06-11</time> </span><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-folder"></i> </span><span class=post-meta-item-text>分类于</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing><a href=/categories/Java/ itemprop=url rel=index><span itemprop=name>Java</span></a> </span>， <span itemprop=about itemscope itemtype=http://schema.org/Thing><a href=/categories/Java/Spring/ itemprop=url rel=index><span itemprop=name>Spring</span></a> </span></span><span class="post-meta-item leancloud_visitors" data-flag-title="spring event 介绍" id=/2022/01/30/spring-event-%E4%BB%8B%E7%BB%8D/ title=阅读次数><span class=post-meta-item-icon><i class="far fa-eye"></i> </span><span class=post-meta-item-text>阅读次数：</span> <span class=leancloud-visitors-count></span> </span><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-comment"></i> </span><span class=post-meta-item-text>Disqus：</span> <a href=/2022/01/30/spring-event-%E4%BB%8B%E7%BB%8D/#disqus_thread itemprop=discussionUrl title=disqus><span class="post-comments-count disqus-comment-count" data-disqus-identifier=2022/01/30/spring-event-介绍/ itemprop=commentCount></span></a></span></div></div></header><div class=post-body itemprop=articleBody><p>spring框架中如果想使用一些一部操作，除了依赖第三方中间件的消息队列，还可以用spring自己的event，简单介绍下使用方法<br>首先我们可以建一个event，继承ApplicationEvent<pre class="line-numbers language-java" data-language=java><code class=language-java>
|
|
<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">CustomSpringEvent</span> <span class="token keyword">extends</span> <span class="token class-name">ApplicationEvent</span> <span class="token punctuation">{</span>
|
|
|
|
<span class="token keyword">private</span> <span class="token class-name">String</span> message<span class="token punctuation">;</span>
|
|
|
|
<span class="token keyword">public</span> <span class="token class-name">CustomSpringEvent</span><span class="token punctuation">(</span><span class="token class-name">Object</span> source<span class="token punctuation">,</span> <span class="token class-name">String</span> message<span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">super</span><span class="token punctuation">(</span>source<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token keyword">this</span><span class="token punctuation">.</span>message <span class="token operator">=</span> message<span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span>
|
|
<span class="token keyword">public</span> <span class="token class-name">String</span> <span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">return</span> message<span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span>
|
|
<span class="token punctuation">}</span><span aria-hidden=true class=line-numbers-rows><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><p>这个 ApplicationEvent 其实也比较简单，内部就一个 Object 类型的 source，可以自行扩展，我们在自定义的这个 Event 里加了个 Message ，只是简单介绍下使用<pre class="line-numbers language-java" data-language=java><code class=language-java><span class="token keyword">public</span> <span class="token keyword">abstract</span> <span class="token keyword">class</span> <span class="token class-name">ApplicationEvent</span> <span class="token keyword">extends</span> <span class="token class-name">EventObject</span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">long</span> serialVersionUID <span class="token operator">=</span> <span class="token number">7099057708183571937L</span><span class="token punctuation">;</span>
|
|
<span class="token keyword">private</span> <span class="token keyword">final</span> <span class="token keyword">long</span> timestamp<span class="token punctuation">;</span>
|
|
|
|
<span class="token keyword">public</span> <span class="token class-name">ApplicationEvent</span><span class="token punctuation">(</span><span class="token class-name">Object</span> source<span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">super</span><span class="token punctuation">(</span>source<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token keyword">this</span><span class="token punctuation">.</span>timestamp <span class="token operator">=</span> <span class="token class-name">System</span><span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span>
|
|
|
|
<span class="token keyword">public</span> <span class="token class-name">ApplicationEvent</span><span class="token punctuation">(</span><span class="token class-name">Object</span> source<span class="token punctuation">,</span> <span class="token class-name">Clock</span> clock<span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">super</span><span class="token punctuation">(</span>source<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token keyword">this</span><span class="token punctuation">.</span>timestamp <span class="token operator">=</span> clock<span class="token punctuation">.</span><span class="token function">millis</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span>
|
|
|
|
<span class="token keyword">public</span> <span class="token keyword">final</span> <span class="token keyword">long</span> <span class="token function">getTimestamp</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span>timestamp<span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span>
|
|
<span class="token punctuation">}</span><span aria-hidden=true class=line-numbers-rows><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><p>然后就是事件生产者和监听消费者<pre class="line-numbers language-java" data-language=java><code class=language-java><span class="token annotation punctuation">@Component</span>
|
|
<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">CustomSpringEventPublisher</span> <span class="token punctuation">{</span>
|
|
|
|
<span class="token annotation punctuation">@Resource</span>
|
|
<span class="token keyword">private</span> <span class="token class-name">ApplicationEventPublisher</span> applicationEventPublisher<span class="token punctuation">;</span>
|
|
|
|
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">publishCustomEvent</span><span class="token punctuation">(</span><span class="token keyword">final</span> <span class="token class-name">String</span> message<span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
<span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"Publishing custom event. "</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token class-name">CustomSpringEvent</span> customSpringEvent <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">CustomSpringEvent</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">,</span> message<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
applicationEventPublisher<span class="token punctuation">.</span><span class="token function">publishEvent</span><span class="token punctuation">(</span>customSpringEvent<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span>
|
|
<span class="token punctuation">}</span><span aria-hidden=true class=line-numbers-rows><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><p>这里的 ApplicationEventPublisher 是 Spring 的方法接口<pre class="line-numbers language-java" data-language=java><code class=language-java><span class="token annotation punctuation">@FunctionalInterface</span>
|
|
<span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">ApplicationEventPublisher</span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">default</span> <span class="token keyword">void</span> <span class="token function">publishEvent</span><span class="token punctuation">(</span><span class="token class-name">ApplicationEvent</span> event<span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">publishEvent</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token class-name">Object</span><span class="token punctuation">)</span>event<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span>
|
|
|
|
<span class="token keyword">void</span> <span class="token function">publishEvent</span><span class="token punctuation">(</span><span class="token class-name">Object</span> var1<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span><span aria-hidden=true class=line-numbers-rows><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><p>具体的是例如 <code>org.springframework.context.support.AbstractApplicationContext#publishEvent(java.lang.Object, org.springframework.core.ResolvableType)</code> 中的实现，后面可以展开讲讲<p>事件监听者：<pre class="line-numbers language-java" data-language=java><code class=language-java><span class="token annotation punctuation">@Component</span>
|
|
<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">CustomSpringEventListener</span> <span class="token keyword">implements</span> <span class="token class-name">ApplicationListener</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">CustomSpringEvent</span><span class="token punctuation">></span></span> <span class="token punctuation">{</span>
|
|
<span class="token annotation punctuation">@Override</span>
|
|
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">onApplicationEvent</span><span class="token punctuation">(</span><span class="token class-name">CustomSpringEvent</span> event<span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
<span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"Received spring custom event - "</span> <span class="token operator">+</span> event<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span>
|
|
<span class="token punctuation">}</span><span aria-hidden=true class=line-numbers-rows><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><p>这里的也是 spring 的一个方法接口<pre class="line-numbers language-java" data-language=java><code class=language-java><span class="token annotation punctuation">@FunctionalInterface</span>
|
|
<span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">ApplicationListener</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">E</span> <span class="token keyword">extends</span> <span class="token class-name">ApplicationEvent</span><span class="token punctuation">></span></span> <span class="token keyword">extends</span> <span class="token class-name">EventListener</span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">void</span> <span class="token function">onApplicationEvent</span><span class="token punctuation">(</span><span class="token class-name">E</span> var1<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
<span class="token keyword">static</span> <span class="token generics"><span class="token punctuation"><</span><span class="token class-name">T</span><span class="token punctuation">></span></span> <span class="token class-name">ApplicationListener</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">PayloadApplicationEvent</span><span class="token punctuation"><</span><span class="token class-name">T</span><span class="token punctuation">></span><span class="token punctuation">></span></span> <span class="token function">forPayload</span><span class="token punctuation">(</span><span class="token class-name">Consumer</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">T</span><span class="token punctuation">></span></span> consumer<span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">return</span> <span class="token punctuation">(</span>event<span class="token punctuation">)</span> <span class="token operator">-></span> <span class="token punctuation">{</span>
|
|
consumer<span class="token punctuation">.</span><span class="token function">accept</span><span class="token punctuation">(</span>event<span class="token punctuation">.</span><span class="token function">getPayload</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span>
|
|
<span class="token punctuation">}</span><span aria-hidden=true class=line-numbers-rows><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><p>然后简单包个请求<pre class="line-numbers language-java" data-language=java><code class=language-java>
|
|
<span class="token annotation punctuation">@RequestMapping</span><span class="token punctuation">(</span>value <span class="token operator">=</span> <span class="token string">"/event"</span><span class="token punctuation">,</span> method <span class="token operator">=</span> <span class="token class-name">RequestMethod</span><span class="token punctuation">.</span><span class="token constant">GET</span><span class="token punctuation">)</span>
|
|
<span class="token annotation punctuation">@ResponseBody</span>
|
|
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">event</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
customSpringEventPublisher<span class="token punctuation">.</span><span class="token function">publishCustomEvent</span><span class="token punctuation">(</span><span class="token string">"hello sprint event"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span><span aria-hidden=true class=line-numbers-rows><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><p><img data-src=https://img.nicksxs.com/uPic/RppSmk.png><br>就能看到接收到消息了。</div><footer class=post-footer><div class=post-eof></div></footer></article></div><div class=post-block><article class=post-content itemscope itemtype=http://schema.org/Article><link href=https://nicksxs.me/2022/01/22/2021-%E5%B9%B4%E7%BB%88%E6%80%BB%E7%BB%93/ itemprop=mainEntityOfPage><span hidden itemprop=author itemscope itemtype=http://schema.org/Person><meta content=/uploads/avatar.jpg itemprop=image><meta content=Nicksxs itemprop=name></span><span hidden itemprop=publisher itemscope itemtype=http://schema.org/Organization><meta content="Nicksxs's Blog" itemprop=name><meta content="learn from zero,技术博客，Nicksxs，史学森" itemprop=description></span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork><meta content="undefined | Nicksxs's Blog" itemprop=name><meta itemprop=description></span><header class=post-header><h2 itemprop="name headline" class=post-title><a class=post-title-link href=/2022/01/22/2021-%E5%B9%B4%E7%BB%88%E6%80%BB%E7%BB%93/ itemprop=url>2021 年终总结</a></h2><div class=post-meta-container><div class=post-meta><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-calendar"></i> </span><span class=post-meta-item-text>发表于</span> <time itemprop="dateCreated datePublished" title="创建时间：2022-01-22 23:27:06" datetime=2022-01-22T23:27:06+08:00>2022-01-22</time> </span><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-folder"></i> </span><span class=post-meta-item-text>分类于</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing><a href=/categories/%E7%94%9F%E6%B4%BB/ itemprop=url rel=index><span itemprop=name>生活</span></a> </span>， <span itemprop=about itemscope itemtype=http://schema.org/Thing><a href=/categories/%E7%94%9F%E6%B4%BB/%E5%B9%B4%E7%BB%88%E6%80%BB%E7%BB%93/ itemprop=url rel=index><span itemprop=name>年终总结</span></a> </span></span><span class="post-meta-item leancloud_visitors" data-flag-title="2021 年终总结" id=/2022/01/22/2021-%E5%B9%B4%E7%BB%88%E6%80%BB%E7%BB%93/ title=阅读次数><span class=post-meta-item-icon><i class="far fa-eye"></i> </span><span class=post-meta-item-text>阅读次数：</span> <span class=leancloud-visitors-count></span> </span><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-comment"></i> </span><span class=post-meta-item-text>Disqus：</span> <a href=/2022/01/22/2021-%E5%B9%B4%E7%BB%88%E6%80%BB%E7%BB%93/#disqus_thread itemprop=discussionUrl title=disqus><span class="post-comments-count disqus-comment-count" data-disqus-identifier=2022/01/22/2021-年终总结/ itemprop=commentCount></span></a></span></div></div></header><div class=post-body itemprop=articleBody><p>又是一年年终总结，本着极度讨厌实时需求的理念，我还是 T+N 发布这个年终总结<h1 id=工作篇><a class=headerlink href=#工作篇 title=工作篇></a>工作篇</h1><p>工作没什么大变化，有了些微的提升，可能因为是来了之后做了些项目对比公司与来还算是比较重要的，但是技术难度上没有特别突出的点，可能最开始用 openresty+lua 做了个 ab 测的工具，还是让我比较满意的，后面一般都是业务型的需求，今年可能在业务相关的技术逻辑上有了一些深度的了解，而原来一直想做的业务架构升级和通用型技术中间件这样的优化还是停留在想象中，前面说的 ab 测应该算是个半成品，还是没能多走出这一步，得需要多做一些实在的事情，比如轻量级的业务框架，能够对原先不熟悉的业务逻辑，代码逻辑有比较深入的理解，而不是一直都是让特定的同学负责特定的逻辑，很多时候还是在偷懒，习惯以一些简单安全的方案去做事情，在技术上还是要有所追求，还有就是能够在新语言，主要是 rust，swift 这类的能有些小玩具可以做，rust 的话是因为今年看了一本相关的书，后面三分之一其实消化得不好，这本书整体来说是很不错的，只是 rust 本身在所有权这块，还有引用包装等方面是设计得比较难懂，也可能是我基础差，所以还是想在复习下，可以做一个简单的命令行工具这种，然后 swift 是想说可以做点 mac 的小软件，原生的毕竟性能好点，又小。基于 web 做的客户端大部分都是又丑又大，极少数能好看点，但也是很重，起码 7~80M 的大小，原生的估计能除以 10。<br>整体的职业规划貌似陷入了比较大的困惑期，在目前公司发展前景不是很大，但是出去貌似也没有比较适合我的机会，总的来说还是杭州比较卷，个人觉得有自己的时间是非常重要的，而且这个不光是用来自我提升的，还是让自己有足够的时间做缓冲，有足够的时间锻炼减肥，时间少的情况下，不光会在仅有的时间里暴饮暴食，还没空锻炼，身体是革命的本钱，现在其实能特别明显地感觉到身体状态下滑，容易疲劳，焦虑。所以是否也许有可能以后要往外企这类的方向去发展。<br>工作上其实还是有个不大不小的缺点，就是容易激动，容易焦虑，前一点可能有稍稍地改观，因为工作中的很多现状其实是我个人难以改变的，即使觉得不合理，但是结构在那里，还不如自己放宽心，尽量做好事情就行。第二点的话还是做得比较差，一直以来抗压能力都比较差，跟成长环境，家庭环境都有比较大的关系，而且说实在的特别是父母，基本也没有在这方面给我正向的帮助，比较擅长给我施压，从小就是通过压力让我好好读书，当个乖学生，考个好学校，并没有能真正地理解我的压力，教我或者帮助我解压，只会在那说着不着边际的空话，甚至经常反过来对我施压。还是希望能慢慢解开，这点可能对我身体也有影响，也许需要看一些心理疏导相关的书籍。工作篇暂时到这，后续还有其他篇，未完待续哈哈😀</div><footer class=post-footer><div class=post-eof></div></footer></article></div><div class=post-block><article class=post-content itemscope itemtype=http://schema.org/Article><link href=https://nicksxs.me/2022/01/16/%E6%90%AC%E8%BF%90%E4%B8%A4%E4%B8%AA-StackOverflow-%E4%B8%8A%E7%9A%84-Mysql-%E7%BC%96%E7%A0%81%E7%9B%B8%E5%85%B3%E7%9A%84%E9%97%AE%E9%A2%98%E8%A7%A3%E7%AD%94/ itemprop=mainEntityOfPage><span hidden itemprop=author itemscope itemtype=http://schema.org/Person><meta content=/uploads/avatar.jpg itemprop=image><meta content=Nicksxs itemprop=name></span><span hidden itemprop=publisher itemscope itemtype=http://schema.org/Organization><meta content="Nicksxs's Blog" itemprop=name><meta content="learn from zero,技术博客，Nicksxs，史学森" itemprop=description></span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork><meta content="undefined | Nicksxs's Blog" itemprop=name><meta itemprop=description></span><header class=post-header><h2 itemprop="name headline" class=post-title><a class=post-title-link href=/2022/01/16/%E6%90%AC%E8%BF%90%E4%B8%A4%E4%B8%AA-StackOverflow-%E4%B8%8A%E7%9A%84-Mysql-%E7%BC%96%E7%A0%81%E7%9B%B8%E5%85%B3%E7%9A%84%E9%97%AE%E9%A2%98%E8%A7%A3%E7%AD%94/ itemprop=url>搬运两个 StackOverflow 上的 Mysql 编码相关的问题解答</a></h2><div class=post-meta-container><div class=post-meta><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-calendar"></i> </span><span class=post-meta-item-text>发表于</span> <time itemprop="dateCreated datePublished" title="创建时间：2022-01-16 20:52:31" datetime=2022-01-16T20:52:31+08:00>2022-01-16</time> </span><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-folder"></i> </span><span class=post-meta-item-text>分类于</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing><a href=/categories/Mysql/ itemprop=url rel=index><span itemprop=name>Mysql</span></a> </span></span><span class="post-meta-item leancloud_visitors" data-flag-title="搬运两个 StackOverflow 上的 Mysql 编码相关的问题解答" id=/2022/01/16/%E6%90%AC%E8%BF%90%E4%B8%A4%E4%B8%AA-StackOverflow-%E4%B8%8A%E7%9A%84-Mysql-%E7%BC%96%E7%A0%81%E7%9B%B8%E5%85%B3%E7%9A%84%E9%97%AE%E9%A2%98%E8%A7%A3%E7%AD%94/ title=阅读次数><span class=post-meta-item-icon><i class="far fa-eye"></i> </span><span class=post-meta-item-text>阅读次数：</span> <span class=leancloud-visitors-count></span> </span><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-comment"></i> </span><span class=post-meta-item-text>Disqus：</span> <a href=/2022/01/16/%E6%90%AC%E8%BF%90%E4%B8%A4%E4%B8%AA-StackOverflow-%E4%B8%8A%E7%9A%84-Mysql-%E7%BC%96%E7%A0%81%E7%9B%B8%E5%85%B3%E7%9A%84%E9%97%AE%E9%A2%98%E8%A7%A3%E7%AD%94/#disqus_thread itemprop=discussionUrl title=disqus><span class="post-comments-count disqus-comment-count" data-disqus-identifier=2022/01/16/搬运两个-StackOverflow-上的-Mysql-编码相关的问题解答/ itemprop=commentCount></span></a></span></div></div></header><div class=post-body itemprop=articleBody><h1 id=Mysql-字符编码和排序规则><a title="Mysql 字符编码和排序规则" class=headerlink href=#Mysql-字符编码和排序规则></a>Mysql 字符编码和排序规则</h1><p>这个一直是属于一知半解的状态，知道 utf8 跟 utf8mb4 的区别主要是能不能支持 emoji，但是具体后面配置的排序规则是用来干嘛，或者有什么区别，应该使用哪个，所以在 stackoverflow 上找了下，有两个比较不错的解答，就搬过来并且配合机翻做了点修改<h3 id=原文><a class=headerlink href=#原文 title=原文></a><a href=https://stackoverflow.com/questions/766809/whats-the-difference-between-utf8-general-ci-and-utf8-unicode-ci rel=noopener target=_blank>原文</a></h3><p>For those people still arriving at this question in 2020 or later, there are newer options that may be better than both of these. For example, <code>utf8mb4_0900_ai_ci</code>.<p>All these collations are for the UTF-8 character encoding. The differences are in how text is sorted and compared.<p><code>_unicode_ci</code> and <code>_general_ci</code> are two different sets of rules for sorting and comparing text according to the way we expect. Newer versions of MySQL introduce new sets of rules, too, such as <code>_0900_ai_ci</code> for equivalent rules based on Unicode 9.0 - and with no equivalent <code>_general_ci</code> variant. People reading this now should probably use one of these newer collations instead of either <code>_unicode_ci</code> or <code>_general_ci</code>. The description of those older collations below is provided for interest only.<p>MySQL is currently transitioning away from an older, flawed UTF-8 implementation. For now, you need to use utf8mb4 instead of utf8 for the character encoding part, to ensure you are getting the fixed version. The flawed version remains for backward compatibility, though it is being deprecated.<p>Key differences<p><code>utf8mb4_unicode_ci</code> is based on the official Unicode rules for universal sorting and comparison, which sorts accurately in a wide range of languages.<p><code>utf8mb4_general_ci</code> is a simplified set of sorting rules which aims to do as well as it can while taking many short-cuts designed to improve speed. It does not follow the Unicode rules and will result in undesirable sorting or comparison in some situations, such as when using particular languages or characters.<p>On modern servers, this performance boost will be all but negligible. It was devised in a time when servers had a tiny fraction of the CPU performance of today’s computers.<p>Benefits of <code>utf8mb4_unicode_ci</code> over <code>utf8mb4_general_ci</code><p>utf8mb4_unicode_ci, which uses the Unicode rules for sorting and comparison, employs a fairly complex algorithm for correct sorting in a wide range of languages and when using a wide range of special characters. These rules need to take into account language-specific conventions; not everybody sorts their characters in what we would call ‘alphabetical order’.<p>As far as Latin (ie “European”) languages go, there is not much difference between the Unicode sorting and the simplified <code>utf8mb4_general_ci</code>sorting in MySQL, but there are still a few differences:<p>For examples, the Unicode collation sorts “ß” like “ss”, and “Œ” like “OE” as people using those characters would normally want, whereas <code>utf8mb4_general_ci</code>sorts them as single characters (presumably like “s” and “e” respectively).<p>Some Unicode characters are defined as ignorable, which means they shouldn’t count toward the sort order and the comparison should move on to the next character instead. <code>utf8mb4_unicode_ci</code>handles these properly.<p>In non-latin languages, such as Asian languages or languages with different alphabets, there may be a lot more differences between Unicode sorting and the simplified <code>utf8mb4_general_ci</code>sorting. The suitability of <code>utf8mb4_general_ci</code>will depend heavily on the language used. For some languages, it’ll be quite inadequate.<p>What should you use?<p>There is almost certainly no reason to use <code>utf8mb4_general_ci</code>anymore, as we have left behind the point where CPU speed is low enough that the performance difference would be important. Your database will almost certainly be limited by other bottlenecks than this.<p>In the past, some people recommended to use <code>utf8mb4_general_ci</code>except when accurate sorting was going to be important enough to justify the performance cost. Today, that performance cost has all but disappeared, and developers are treating internationalization more seriously.<p>There’s an argument to be made that if speed is more important to you than accuracy, you may as well not do any sorting at all. It’s trivial to make an algorithm faster if you do not need it to be accurate. So, <code>utf8mb4_general_ci</code>is a compromise that’s probably not needed for speed reasons and probably also not suitable for accuracy reasons.<p>One other thing I’ll add is that even if you know your application only supports the English language, it may still need to deal with people’s names, which can often contain characters used in other languages in which it is just as important to sort correctly. Using the Unicode rules for everything helps add peace of mind that the very smart Unicode people have worked very hard to make sorting work properly.<p>What the parts mean<p>Firstly, ci is for case-insensitive sorting and comparison. This means it’s suitable for textual data, and case is not important. The other types of collation are cs (case-sensitive) for textual data where case is important, and bin, for where the encoding needs to match, bit for bit, which is suitable for fields which are really encoded binary data (including, for example, Base64). Case-sensitive sorting leads to some weird results and case-sensitive comparison can result in duplicate values differing only in letter case, so case-sensitive collations are falling out of favor for textual data - if case is significant to you, then otherwise ignorable punctuation and so on is probably also significant, and a binary collation might be more appropriate.<p>Next, unicode or general refers to the specific sorting and comparison rules - in particular, the way text is normalized or compared. There are many different sets of rules for the utf8mb4 character encoding, with unicode and general being two that attempt to work well in all possible languages rather than one specific one. The differences between these two sets of rules are the subject of this answer. Note that unicode uses rules from Unicode 4.0. Recent versions of MySQL add the rulesets unicode_520 using rules from Unicode 5.2, and 0900 (dropping the “unicode_” part) using rules from Unicode 9.0.<p>And lastly, utf8mb4 is of course the character encoding used internally. In this answer I’m talking only about Unicode based encodings.<h3 id=翻译><a class=headerlink href=#翻译 title=翻译></a>翻译</h3><p>对于那些在 2020 年或之后仍会遇到这个问题的人，有可能比这两个更好的新选项。例如，<code>utf8mb4_0900_ai_ci</code>。<p>所有这些排序规则都用于 UTF-8 字符编码。不同之处在于文本的排序和比较方式。<p><code>_unicode_ci</code>和 <code>_general_ci</code>是两组不同的规则，用于按照我们期望的方式对文本进行排序和比较。较新版本的 MySQL 也引入了新的规则集，例如 <code>_0900_ai_ci</code>用于基于 Unicode 9.0 的等效规则 - 并且没有等效的 <code>_general_ci</code>变体。现在阅读本文的人可能应该使用这些较新的排序规则之一，而不是 <code>_unicode_ci</code>或 <code>_general_ci</code>。下面对那些较旧的排序规则的描述仅供参考。<p>MySQL 目前正在从旧的、有缺陷的 UTF-8 实现过渡。现在，您需要使用 <code>utf8mb4</code> 而不是 <code>utf8</code>作为字符编码部分，以确保您获得的是固定版本。有缺陷的版本仍然是为了向后兼容，尽管它已被弃用。<p>主要区别<p><code>utf8mb4_unicode_ci</code>基于官方 Unicode 规则进行通用排序和比较，可在多种语言中准确排序。<p><code>utf8mb4_general_ci</code>是一组简化的排序规则，旨在尽其所能，同时采用许多旨在提高速度的捷径。它不遵循 Unicode 规则，并且在某些情况下会导致不希望的排序或比较，例如在使用特定语言或字符时。<p>在现代服务器上，这种性能提升几乎可以忽略不计。它是在服务器的 CPU 性能只有当今计算机的一小部分时设计的。<p><code>utf8mb4_unicode_ci</code> 相对于 <code>utf8mb4_general_ci</code>的优势<p><code>utf8mb4_unicode_ci</code>使用 Unicode 规则进行排序和比较，采用相当复杂的算法在多种语言中以及在使用多种特殊字符时进行正确排序。这些规则需要考虑特定语言的约定；不是每个人都按照我们所说的“字母顺序”对他们的字符进行排序。<p>就拉丁语（即“欧洲”）语言而言，Unicode 排序和 MySQL 中简化的 <code>utf8mb4_general_ci</code>排序没有太大区别，但仍有一些区别：<p>例如，Unicode 排序规则将“ß”排序为“ss”，将“Œ”排序为“OE”，因为使用这些字符的人通常需要这些字符，而 <code>utf8mb4_general_ci</code>将它们排序为单个字符（大概分别像“s”和“e” ）。<p>一些 Unicode 字符被定义为可忽略，这意味着它们不应该计入排序顺序，并且比较应该转到下一个字符。 <code>utf8mb4_unicode_ci</code>正确处理这些。<p>在非拉丁语言中，例如亚洲语言或具有不同字母的语言，Unicode 排序和简化的 <code>utf8mb4_general_ci</code>排序之间可能存在更多差异。 <code>utf8mb4_general_ci</code>的适用性在很大程度上取决于所使用的语言。对于某些语言，这将是非常不充分的。<p>你应该用什么？<p>几乎可以肯定没有理由再使用 <code>utf8mb4_general_ci</code>，因为我们已经将 CPU 速度低到会严重影响性能表现的时代远抛在脑后了。您的数据库几乎肯定会受到除此之外的其他瓶颈的限制。<p>过去，有些人建议使用 <code>utf8mb4_general_ci</code>，除非准确排序足够重要以证明性能成本是合理的。如今，这种性能成本几乎消失了，开发人员正在更加认真地对待国际化。<p>有一个论点是，如果速度对您来说比准确性更重要，那么您可能根本不进行任何排序。如果您不需要准确的算法，那么使算法更快是微不足道的。因此，<code>utf8mb4_general_ci</code>是一种折衷方案，出于速度原因可能不需要，也可能出于准确性原因也不适合。<p>我要补充的另一件事是，即使您知道您的应用程序仅支持英语，它可能仍需要处理人名，这些人名通常包含其他语言中使用的字符，在这些语言中正确排序同样重要.对所有事情都使用 Unicode 规则有助于让您更加安心，因为非常聪明的 Unicode 人员已经非常努力地工作以使排序正常工作。<p>其余各个部分是什么意思<p>首先， <code>ci</code> 用于不区分大小写的排序和比较。这意味着它适用于文本数据，大小写并不重要。其他类型的排序规则是 <code>cs</code>（区分大小写），用于区分大小写的文本数据，以及 <code>bin</code>，用于编码需要匹配的地方，逐位匹配，适用于真正编码二进制数据的字段（包括，用于例如，Base64）。区分大小写的排序会导致一些奇怪的结果，区分大小写的比较可能会导致重复值仅在字母大小写上有所不同，因此区分大小写的排序规则对文本数据不受欢迎 - 如果大小写对您很重要，那么标点符号就可以忽略等等可能也很重要，二进制排序规则可能更合适。<p>接下来，unicode 或general 指的是具体的排序和比较规则——特别是文本被规范化或比较的方式。 utf8mb4 字符编码有许多不同的规则集，其中 unicode 和 general 是两种，它们试图在所有可能的语言中都很好地工作，而不是在一种特定的语言中。这两组规则之间的差异是此答案的主题。请注意，unicode 使用 Unicode 4.0 中的规则。 MySQL 的最新版本使用 Unicode 5.2 的规则添加规则集 unicode_520，使用 Unicode 9.0 的规则添加 0900（删除“unicode_”部分）。<p>最后，utf8mb4 当然是内部使用的字符编码。在这个答案中，我只谈论基于 Unicode 的编码。<h1 id=utf8-和-utf8mb4-编码有什么区别><a title="utf8 和 utf8mb4 编码有什么区别" class=headerlink href=#utf8-和-utf8mb4-编码有什么区别></a>utf8 和 utf8mb4 编码有什么区别</h1><h3 id=原文-1><a class=headerlink href=#原文-1 title=原文></a><a href=https://stackoverflow.com/questions/30074492/what-is-the-difference-between-utf8mb4-and-utf8-charsets-in-mysql rel=noopener target=_blank>原文</a></h3><p><a href=https://en.wikipedia.org/wiki/UTF-8 rel=noopener target=_blank>UTF-8</a>is a variable-length encoding. In the case of UTF-8, this means that storing one code point requires one to four bytes. However, MySQL’s encoding called “utf8” (alias of “utf8mb3”) only stores a maximum of three bytes per code point.<p>So the character set “utf8”/“utf8mb3” cannot store all Unicode code points: it only supports the range 0x000 to 0xFFFF, which is called the “<a href=http://en.wikipedia.org/wiki/Plane_%28Unicode%29#Basic_Multilingual_Plane rel=noopener target=_blank>Basic Multilingual Plane</a>“. See also <a href=http://en.wikipedia.org/wiki/Comparison_of_Unicode_encodings#In_detail rel=noopener target=_blank>Comparison of Unicode encodings</a>.<p>This is what (a previous version of the same page at)<a href=https://dev.mysql.com/doc/refman/5.5/en/charset-unicode-utf8mb4.html rel=noopener target=_blank>the MySQL documentation</a>has to say about it:<blockquote><p>The character set named utf8[/utf8mb3] uses a maximum of three bytes per character and contains only BMP characters. As of MySQL 5.5.3, the utf8mb4 character set uses a maximum of four bytes per character supports supplemental characters:<ul><li>For a BMP character, utf8[/utf8mb3] and utf8mb4 have identical storage characteristics: same code values, same encoding, same length.<li>For a supplementary character, <strong>utf8[/utf8mb3] cannot store the character at all</strong>, while utf8mb4 requires four bytes to store it. Since utf8[/utf8mb3] cannot store the character at all, you do not have any supplementary characters in utf8[/utf8mb3] columns and you need not worry about converting characters or losing data when upgrading utf8[/utf8mb3] data from older versions of MySQL.</ul></blockquote><p>So if you want your column to support storing characters lying outside the BMP (and you usually want to), such as <a href=https://en.wikipedia.org/wiki/Emoji rel=noopener target=_blank>emoji</a>, use “utf8mb4”. See also <a href=https://stackoverflow.com/questions/5567249/what-are-the-most-common-non-bmp-unicode-characters-in-actual-use rel=noopener target=_blank>What are the most common non-BMP Unicode characters in actual use?</a>.<h3 id=译文><a class=headerlink href=#译文 title=译文></a>译文</h3><p><a href=https://en.wikipedia.org/wiki/UTF-8 rel=noopener target=_blank>UTF-8</a> 是一种可变长度编码。对于 UTF-8，这意味着存储一个代码点需要一到四个字节。但是，MySQL 的编码称为“utf8”（“utf8mb3”的别名）每个代码点最多只能存储三个字节。<p>所以字符集“utf8”/“utf8mb3”不能存储所有的Unicode码位：它只支持0x000到0xFFFF的范围，被称为“<a href=http://en.wikipedia.org/wiki/Plane_%28Unicode%29#Basic_Multilingual_Plane rel=noopener target=_blank>基本多语言平面</a>”。另请参阅 <a href=http://en.wikipedia.org/wiki/Comparison_of_Unicode_encodings#In_detail rel=noopener target=_blank>Unicode 编码比较</a>。<p>这就是（同一页面的先前版本）<a href=https://dev.mysql.com/doc/refman/5.5/en/charset-unicode-utf8mb4.html rel=noopener target=_blank>MySQL 文档</a> 不得不说的：<blockquote><p>名为 utf8[/utf8mb3] 的字符集每个字符最多使用三个字节，并且仅包含 BMP 字符。从 MySQL 5.5.3 开始，utf8mb4 字符集每个字符最多使用四个字节，支持补充字符：<ul><li>对于 BMP 字符，utf8[/utf8mb3] 和 utf8mb4 具有相同的存储特性：相同的代码值、相同的编码、相同的长度。<li>对于补充字符，<strong>utf8[/utf8mb3] 根本无法存储该字符</strong>，而 utf8mb4 需要四个字节来存储它。由于 utf8[/utf8mb3] 根本无法存储字符，因此您在 utf8[/utf8mb3] 列中没有任何补充字符，您不必担心从旧版本升级 utf8[/utf8mb3] 数据时转换字符或丢失数据mysql。</ul></blockquote><p>因此，如果您希望您的列支持存储位于 BMP 之外的字符（并且您通常希望这样做），例如 <a href=https://en.wikipedia.org/wiki/Emoji rel=noopener target=_blank>emoji</a>，请使用“utf8mb4”。另请参阅<p><a href=https://stackoverflow.com/questions/5567249/what-are-the-most-common-non-bmp-unicode-characters-in-actual-use rel=noopener target=_blank>实际使用中最常见的非 BMP Unicode 字符是什么？</a> 。</div><footer class=post-footer><div class=post-eof></div></footer></article></div><div class=post-block><article class=post-content itemscope itemtype=http://schema.org/Article><link href=https://nicksxs.me/2022/01/09/%E8%81%8A%E8%81%8A-Sharding-Jdbc-%E5%88%86%E5%BA%93%E5%88%86%E8%A1%A8%E4%B8%8B%E7%9A%84%E5%88%86%E9%A1%B5%E6%96%B9%E6%A1%88/ itemprop=mainEntityOfPage><span hidden itemprop=author itemscope itemtype=http://schema.org/Person><meta content=/uploads/avatar.jpg itemprop=image><meta content=Nicksxs itemprop=name></span><span hidden itemprop=publisher itemscope itemtype=http://schema.org/Organization><meta content="Nicksxs's Blog" itemprop=name><meta content="learn from zero,技术博客，Nicksxs，史学森" itemprop=description></span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork><meta content="undefined | Nicksxs's Blog" itemprop=name><meta itemprop=description></span><header class=post-header><h2 itemprop="name headline" class=post-title><a class=post-title-link href=/2022/01/09/%E8%81%8A%E8%81%8A-Sharding-Jdbc-%E5%88%86%E5%BA%93%E5%88%86%E8%A1%A8%E4%B8%8B%E7%9A%84%E5%88%86%E9%A1%B5%E6%96%B9%E6%A1%88/ itemprop=url>聊聊 Sharding-Jdbc 分库分表下的分页方案</a></h2><div class=post-meta-container><div class=post-meta><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-calendar"></i> </span><span class=post-meta-item-text>发表于</span> <time itemprop="dateCreated datePublished" title="创建时间：2022-01-09 20:02:49" datetime=2022-01-09T20:02:49+08:00>2022-01-09</time> </span><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-calendar-check"></i> </span><span class=post-meta-item-text>更新于</span> <time title="修改时间：2022-06-11 22:45:11" datetime=2022-06-11T22:45:11+08:00 itemprop=dateModified>2022-06-11</time> </span><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-folder"></i> </span><span class=post-meta-item-text>分类于</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing><a href=/categories/Java/ itemprop=url rel=index><span itemprop=name>Java</span></a> </span></span><span class="post-meta-item leancloud_visitors" data-flag-title="聊聊 Sharding-Jdbc 分库分表下的分页方案" id=/2022/01/09/%E8%81%8A%E8%81%8A-Sharding-Jdbc-%E5%88%86%E5%BA%93%E5%88%86%E8%A1%A8%E4%B8%8B%E7%9A%84%E5%88%86%E9%A1%B5%E6%96%B9%E6%A1%88/ title=阅读次数><span class=post-meta-item-icon><i class="far fa-eye"></i> </span><span class=post-meta-item-text>阅读次数：</span> <span class=leancloud-visitors-count></span> </span><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-comment"></i> </span><span class=post-meta-item-text>Disqus：</span> <a href=/2022/01/09/%E8%81%8A%E8%81%8A-Sharding-Jdbc-%E5%88%86%E5%BA%93%E5%88%86%E8%A1%A8%E4%B8%8B%E7%9A%84%E5%88%86%E9%A1%B5%E6%96%B9%E6%A1%88/#disqus_thread itemprop=discussionUrl title=disqus><span class="post-comments-count disqus-comment-count" data-disqus-identifier=2022/01/09/聊聊-Sharding-Jdbc-分库分表下的分页方案/ itemprop=commentCount></span></a></span></div></div></header><div class=post-body itemprop=articleBody><p>前面在聊 Sharding-Jdbc 的时候看到了一篇文章，关于一个分页的查询，一直比较直接的想法就是分库分表下的分页是非常不合理的，一般我们的实操方案都是分表加上 ES 搜索做分页，或者通过合表读写分离的方案，因为对于 sharding-jdbc 如果没有带分表键，查询基本都是只能在所有分表都执行一遍，然后再加上分页，基本上是分页越大后续的查询越耗资源，但是仔细的去想这个细节还是这次，就简单说说<br>首先就是我的分表结构<pre class="line-numbers language-sql" data-language=sql><code class=language-sql><span class="token keyword">CREATE</span> <span class="token keyword">TABLE</span> <span class="token identifier"><span class="token punctuation">`</span>student_time_0<span class="token punctuation">`</span></span> <span class="token punctuation">(</span>
|
|
<span class="token identifier"><span class="token punctuation">`</span>id<span class="token punctuation">`</span></span> <span class="token keyword">int</span><span class="token punctuation">(</span><span class="token number">11</span><span class="token punctuation">)</span> <span class="token keyword">unsigned</span> <span class="token operator">NOT</span> <span class="token boolean">NULL</span> <span class="token keyword">AUTO_INCREMENT</span><span class="token punctuation">,</span>
|
|
<span class="token identifier"><span class="token punctuation">`</span>user_id<span class="token punctuation">`</span></span> <span class="token keyword">int</span><span class="token punctuation">(</span><span class="token number">11</span><span class="token punctuation">)</span> <span class="token operator">NOT</span> <span class="token boolean">NULL</span><span class="token punctuation">,</span>
|
|
<span class="token identifier"><span class="token punctuation">`</span>name<span class="token punctuation">`</span></span> <span class="token keyword">varchar</span><span class="token punctuation">(</span><span class="token number">200</span><span class="token punctuation">)</span> <span class="token keyword">COLLATE</span> utf8_bin <span class="token keyword">DEFAULT</span> <span class="token boolean">NULL</span><span class="token punctuation">,</span>
|
|
<span class="token identifier"><span class="token punctuation">`</span>age<span class="token punctuation">`</span></span> <span class="token keyword">tinyint</span><span class="token punctuation">(</span><span class="token number">3</span><span class="token punctuation">)</span> <span class="token keyword">unsigned</span> <span class="token keyword">DEFAULT</span> <span class="token boolean">NULL</span><span class="token punctuation">,</span>
|
|
<span class="token identifier"><span class="token punctuation">`</span>create_time<span class="token punctuation">`</span></span> <span class="token keyword">bigint</span><span class="token punctuation">(</span><span class="token number">20</span><span class="token punctuation">)</span> <span class="token keyword">DEFAULT</span> <span class="token boolean">NULL</span><span class="token punctuation">,</span>
|
|
<span class="token keyword">PRIMARY</span> <span class="token keyword">KEY</span> <span class="token punctuation">(</span><span class="token identifier"><span class="token punctuation">`</span>id<span class="token punctuation">`</span></span><span class="token punctuation">)</span>
|
|
<span class="token punctuation">)</span> <span class="token keyword">ENGINE</span><span class="token operator">=</span><span class="token keyword">InnoDB</span> <span class="token keyword">AUTO_INCREMENT</span><span class="token operator">=</span><span class="token number">674</span> <span class="token keyword">DEFAULT</span> <span class="token keyword">CHARSET</span><span class="token operator">=</span>utf8 <span class="token keyword">COLLATE</span><span class="token operator">=</span>utf8_bin<span class="token punctuation">;</span><span aria-hidden=true class=line-numbers-rows><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><p>有这样的三个表，<code>student_time_0</code>, <code>student_time_1</code>, <code>student_time_2</code>, 以 user_id 作为分表键，根据表数量取模作为分表依据<br>这里先构造点数据，<pre class="line-numbers language-sql" data-language=sql><code class=language-sql><span class="token keyword">insert</span> <span class="token keyword">into</span> student_time <span class="token punctuation">(</span><span class="token identifier"><span class="token punctuation">`</span>name<span class="token punctuation">`</span></span><span class="token punctuation">,</span> <span class="token identifier"><span class="token punctuation">`</span>user_id<span class="token punctuation">`</span></span><span class="token punctuation">,</span> <span class="token identifier"><span class="token punctuation">`</span>age<span class="token punctuation">`</span></span><span class="token punctuation">,</span> <span class="token identifier"><span class="token punctuation">`</span>create_time<span class="token punctuation">`</span></span><span class="token punctuation">)</span> <span class="token keyword">values</span> <span class="token punctuation">(</span>?<span class="token punctuation">,</span> ?<span class="token punctuation">,</span> ?<span class="token punctuation">,</span> ?<span class="token punctuation">)</span><span aria-hidden=true class=line-numbers-rows><span></span></span></code></pre><p>主要是为了保证 <code>create_time</code> 唯一比较好说明问题，<pre class="line-numbers language-java" data-language=java><code class=language-java><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
|
|
<span class="token keyword">try</span> <span class="token punctuation">(</span>
|
|
<span class="token class-name">Connection</span> conn <span class="token operator">=</span> dataSource<span class="token punctuation">.</span><span class="token function">getConnection</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token class-name">PreparedStatement</span> ps <span class="token operator">=</span> conn<span class="token punctuation">.</span><span class="token function">prepareStatement</span><span class="token punctuation">(</span>insertSql<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">do</span> <span class="token punctuation">{</span>
|
|
ps<span class="token punctuation">.</span><span class="token function">setString</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> localName <span class="token operator">+</span> <span class="token keyword">new</span> <span class="token class-name">Random</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">nextInt</span><span class="token punctuation">(</span><span class="token number">100</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
ps<span class="token punctuation">.</span><span class="token function">setLong</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">10086L</span> <span class="token operator">+</span> <span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Random</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">nextInt</span><span class="token punctuation">(</span><span class="token number">100</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
ps<span class="token punctuation">.</span><span class="token function">setInt</span><span class="token punctuation">(</span><span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">18</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
ps<span class="token punctuation">.</span><span class="token function">setLong</span><span class="token punctuation">(</span><span class="token number">4</span><span class="token punctuation">,</span> <span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getTime</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
|
|
<span class="token keyword">int</span> result <span class="token operator">=</span> ps<span class="token punctuation">.</span><span class="token function">executeUpdate</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token constant">LOGGER</span><span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"current execute result: {}"</span><span class="token punctuation">,</span> result<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token class-name">Thread</span><span class="token punctuation">.</span><span class="token function">sleep</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Random</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">nextInt</span><span class="token punctuation">(</span><span class="token number">100</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
i<span class="token operator">++</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span> <span class="token keyword">while</span> <span class="token punctuation">(</span>i <span class="token operator"><=</span> <span class="token number">2000</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span aria-hidden=true class=line-numbers-rows><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><p>三个表的数据分别是 673，678，650，说明符合预期了，各个表数据不一样，接下来比如我们想要做一个这样的分页查询<pre class="line-numbers language-sql" data-language=sql><code class=language-sql><span class="token keyword">select</span> <span class="token operator">*</span> <span class="token keyword">from</span> student_time <span class="token keyword">ORDER</span> <span class="token keyword">BY</span> create_time <span class="token keyword">ASC</span> <span class="token keyword">limit</span> <span class="token number">1000</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">;</span><span aria-hidden=true class=line-numbers-rows><span></span></span></code></pre><p><code>student_time</code> 对于我们使用的 <code>sharding-jdbc</code> 来说当然是逻辑表，首先从一无所知去想这个查询如果我们自己来处理应该是怎么做，<br>首先是不是可以每个表都从 333 开始取 5 条数据，类似于下面的查询，然后进行 15 条的合并重排序获取前面的 5 条<pre class="line-numbers language-none"><code class=language-none>select * from student_time_0 ORDER BY create_time ASC limit 333, 5;
|
|
select * from student_time_1 ORDER BY create_time ASC limit 333, 5;
|
|
select * from student_time_2 ORDER BY create_time ASC limit 333, 5;<span aria-hidden=true class=line-numbers-rows><span></span><span></span><span></span></span></code></pre><p>忽略前面 limit 差的 1，这个结果除非三个表的分布是绝对的均匀，否则结果肯定会出现一定的偏差，以为每个表的 333 这个位置对于其他表来说都不一定是一样的，这样对于最后整体的结果，就会出现偏差<br>因为一直在纠结怎么让这个更直观的表现出来，所以尝试画了个图<br><img data-src=https://img.nicksxs.com/uPic/Gj7TPq.png><br>黑色的框代表我从每个表里按排序从 334 到 338 的 5 条数据， 他们在每个表里都是代表了各自正确的排序值，但是对于我们想要的其实是合表后的 1001，1005 这五条，然后我们假设总的排序值位于前 1000 的分布是第 0 个表是 320 条，第 1 个表是 340 条，第 2 个表是 340 条，那么可以明显地看出来我这么查的结果简单合并肯定是不对的。<br>那么 sharding-jdbc 是如何保证这个结果的呢，其实就是我在每个表里都查分页偏移量和分页大小那么多的数据，在我这个例子里就是对于 0，1，2 三个分表每个都查 1005 条数据，即使我的数据不平衡到最极端的情况，前 1005 条数据都出在某个分表中，也可以正确获得最后的结果，但是明显的问题就是大分页，数据较多，就会导致非常大的问题，即使如 sharding-jdbc 对于合并排序的优化做得比较好，也还是需要传输那么大量的数据，并且查询也耗时，那么有没有解决方案呢，应该说有两个，或者说主要是想讲后者<br>第一个办法是像这种查询，如果业务上不需要进行跳页，而是只给下一页，那么我们就能把前一次的最大偏移量的 create_time 记录下来，下一页就可以拿着这个偏移量进行查询，这个比较简单易懂，就不多说了<br>第二个办法是看的58 沈剑的一篇文章，尝试理解讲述一下，<br>这个办法的第一步跟前面那个错误的方法或者说不准确的方法一样，先是将分页偏移量平均后在三个表里进行查询<pre class="line-numbers language-none"><code class=language-none>t0
|
|
334 10158 nick95 18 1641548941767
|
|
335 10098 nick11 18 1641548941879
|
|
336 10167 nick51 18 1641548942089
|
|
337 10167 nick3 18 1641548942119
|
|
338 10170 nick57 18 1641548942169
|
|
|
|
|
|
t1
|
|
334 10105 nick98 18 1641548939071 最小
|
|
335 10174 nick94 18 1641548939377
|
|
336 10129 nick85 18 1641548939442
|
|
337 10141 nick84 18 1641548939480
|
|
338 10096 nick74 18 1641548939668
|
|
|
|
t2
|
|
334 10184 nick11 18 1641548945075
|
|
335 10109 nick93 18 1641548945382
|
|
336 10181 nick41 18 1641548945583
|
|
337 10130 nick80 18 1641548945993
|
|
338 10184 nick19 18 1641548946294 最大<span aria-hidden=true class=line-numbers-rows><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><p>然后要做什么呢，其实目标比较明白，因为前面那种方法其实就是我知道了前一页的偏移量，所以可以直接当做条件来进行查询，那这里我也想着拿到这个条件，所以我将第一遍查出来的最小的 create_time 和最大的 create_time 找出来，然后再去三个表里查询，其实主要是最小值，因为我拿着最小值去查以后我就能知道这个最小值在每个表里处在什么位置，<pre class="line-numbers language-none"><code class=language-none>t0
|
|
322 10161 nick81 18 1641548939284
|
|
323 10113 nick16 18 1641548939393
|
|
324 10110 nick56 18 1641548939577
|
|
325 10116 nick69 18 1641548939588
|
|
326 10173 nick51 18 1641548939646
|
|
|
|
t1
|
|
334 10105 nick98 18 1641548939071
|
|
335 10174 nick94 18 1641548939377
|
|
336 10129 nick85 18 1641548939442
|
|
337 10141 nick84 18 1641548939480
|
|
338 10096 nick74 18 1641548939668
|
|
|
|
t2
|
|
297 10136 nick28 18 1641548939161
|
|
298 10142 nick68 18 1641548939177
|
|
299 10124 nick41 18 1641548939237
|
|
300 10148 nick87 18 1641548939510
|
|
301 10169 nick23 18 1641548939715<span aria-hidden=true class=line-numbers-rows><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><p>我只贴了前五条数据，为了方便知道偏移量，每个分表都使用了自增主键，我们可以看到前一次查询的最小值分别在其他两个表里的位置分别是 322-1 和 297-1，那么对于总体来说这个时间应该是在 <code>322 - 1 + 333 + 297 - 1 = 951</code>，那这样子我只要对后面的数据最多每个表查 <code>1000 - 951 + 5 = 54</code> 条数据再进行合并排序就可以获得最终正确的结果。<br>这个就是传说中的二次查询法。</div><footer class=post-footer><div class=post-eof></div></footer></article></div><nav class=pagination><a class="extend prev" aria-label=上一页 href=/page/17/ rel=prev title=上一页><i class="fa fa-angle-left"></i></a><a class=page-number href=/>1</a><span class=space>…</span><a class=page-number href=/page/17/>17</a><span class="page-number current">18</span><a class=page-number href=/page/19/>19</a><span class=space>…</span><a class=page-number href=/page/46/>46</a><a class="extend next" aria-label=下一页 href=/page/19/ rel=next title=下一页><i class="fa fa-angle-right"></i></a></nav></div></main><footer class=footer><div class=footer-inner><div class=beian><a href=https://beian.miit.gov.cn/ rel=noopener target=_blank>浙ICP备16002580号-2 </a><img alt src=/uploads/beian.png><a href=http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=33010602011094 rel=noopener target=_blank>浙公网安备 33010602011094号</a></div><div class=copyright>© <span itemprop=copyrightYear>2023</span><span class=with-love><i class="fa fa-heart"></i> </span><span class=author itemprop=copyrightHolder>Nicksxs</span></div><div class=busuanzi-count><span class=post-meta-item id=busuanzi_container_site_uv><span class=post-meta-item-icon><i class="fa fa-user"></i> </span><span class=site-uv title=总访客量><span id=busuanzi_value_site_uv></span> </span></span><span class=post-meta-item id=busuanzi_container_site_pv><span class=post-meta-item-icon><i class="fa fa-eye"></i> </span><span class=site-pv title=总访问量><span id=busuanzi_value_site_pv></span></span></span></div></div></footer><div aria-label=返回顶部 class=back-to-top role=button><i class="fa fa-arrow-up fa-lg"></i><span>0%</span></div><a aria-label="Follow me on GitHub" title="Follow me on GitHub" class=github-corner href=https://github.com/nicksxs rel=noopener target=_blank><svg viewbox="0 0 250 250" aria-hidden=true height=80 width=80><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" style="transform-origin:130px 106px" class=octo-arm fill=currentColor></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" class=octo-body fill=currentColor></path></svg></a><noscript><div class=noscript-warning>Theme NexT works best with JavaScript enabled</div></noscript><script crossorigin=anonymous integrity=sha256-XL2inqUJaslATFnHdJOi9GfQ60on8Wx1C2H8DYiN1xY= src=https://cdnjs.cloudflare.com/ajax/libs/animejs/3.2.1/anime.min.js></script><script crossorigin=anonymous integrity=sha256-pvPw+upLPUjgMXY0G+8O0xUf+/Im1MZjXxxgOcBQBXU= src=https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.3/jquery.min.js></script><script crossorigin=anonymous integrity=sha256-yt2kYMy0w8AbtF89WXb2P1rfjcP/HTHLT7097U8Y5b8= src=https://cdnjs.cloudflare.com/ajax/libs/fancybox/3.5.7/jquery.fancybox.min.js></script><script crossorigin=anonymous integrity=sha256-mOFREFhqmHeQbXpK2lp4nA3qooVgACfh88fpJftLBbc= src=https://cdnjs.cloudflare.com/ajax/libs/lozad.js/1.16.0/lozad.min.js></script><script src=/js/comments.js></script><script src=/js/utils.js></script><script src=/js/motion.js></script><script src=/js/next-boot.js></script><script crossorigin=anonymous integrity=sha256-dyJcbGuYfdzNfifkHxYVd/rzeR6SLLcDFYEidcybldM= src=https://cdnjs.cloudflare.com/ajax/libs/algoliasearch/4.14.3/algoliasearch-lite.umd.js></script><script crossorigin=anonymous integrity=sha256-Nu8yqoXoRZEVYyZf4/eY1V4FsenbiCw85RY3gWjN3zQ= src=https://cdnjs.cloudflare.com/ajax/libs/instantsearch.js/4.49.2/instantsearch.production.min.js></script><script src=/js/third-party/search/algolia-search.js></script><script src=/js/third-party/fancybox.js></script><script async src=https://busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js></script><script class=next-config data-name=leancloud_visitors type=application/json>{"enable":true,"app_id":"ysza182Vghlqjdt7QiwGLLJy-gzGzoHsz","app_key":"s9GDqbn7gnGGkusf66YRVccw","server_url":"https://leancloud.cn","security":true}</script><script src=/js/third-party/statistics/lean-analytics.js></script><script crossorigin=anonymous integrity=sha256-yvJQOINiH9fWemHn0vCA5lsHWJaHs6/ZmO+1Ft04SvM= src=https://cdnjs.cloudflare.com/ajax/libs/quicklink/2.3.0/quicklink.umd.js></script><script class=next-config data-name=quicklink type=application/json>{"enable":false,"home":false,"archive":false,"delay":true,"timeout":3000,"priority":true,"url":"https://nicksxs.me/page/18/"}</script><script src=/js/third-party/quicklink.js></script><script class=next-config data-name=disqus type=application/json>{"enable":true,"shortname":"nicksxs","count":true,"i18n":{"disqus":"disqus"}}</script><script src=/js/third-party/comments/disqus.js></script>
|