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9-Annotation.html
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<!DOCTYPE html><html lang="zh-CN"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width,height=device-height,initial-scale=1.0"><meta name="apple-mobile-web-app-capable" content="yes"><meta http-equiv="X-UA-Compatible" content="ie=edge"><meta property="og:type" content="website"><meta name="twitter:card" content="summary"><style>@media screen{body[data-bespoke-view=""] .bespoke-marp-parent>.bespoke-marp-osc>button,body[data-bespoke-view=next] .bespoke-marp-parent>.bespoke-marp-osc>button,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container button,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container button{appearance:none;background-color:initial;border:0;color:inherit;cursor:pointer;font-size:inherit;opacity:.8;outline:none;padding:0;transition:opacity .2s linear;-webkit-tap-highlight-color:transparent}body[data-bespoke-view=""] .bespoke-marp-parent>.bespoke-marp-osc>button:disabled,body[data-bespoke-view=next] .bespoke-marp-parent>.bespoke-marp-osc>button:disabled,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container button:disabled,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container button:disabled{cursor:not-allowed;opacity:.15!important}body[data-bespoke-view=""] .bespoke-marp-parent>.bespoke-marp-osc>button:hover,body[data-bespoke-view=next] .bespoke-marp-parent>.bespoke-marp-osc>button:hover,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container button:hover,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container button:hover{opacity:1}body[data-bespoke-view=""] .bespoke-marp-parent>.bespoke-marp-osc>button:hover:active,body[data-bespoke-view=next] 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.bespoke-marp-presenter-note-buttons{background:#000000a6;border-radius:4px;bottom:0;display:flex;gap:4px;margin:12px;opacity:0;padding:6px;pointer-events:none;position:absolute;right:0;transition:opacity .2s linear}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-presenter-note-buttons:focus-within,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-presenter-note-wrapper:focus-within+.bespoke-marp-presenter-note-buttons,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container:hover .bespoke-marp-presenter-note-buttons{opacity:1;pointer-events:auto}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-note{box-sizing:border-box;font-size:calc(1.1em*var(--bespoke-marp-note-font-scale, 1));height:calc(100% - 40px);margin:20px;overflow:auto;padding-right:3px;white-space:pre-wrap;width:calc(100% - 40px);word-wrap:break-word;scrollbar-color:#eeeeee80 #0000;scrollbar-width:thin}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-note::-webkit-scrollbar{width:6px}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-note::-webkit-scrollbar-track{background:#0000}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-note::-webkit-scrollbar-thumb{background:#eeeeee80;border-radius:6px}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-note:empty{pointer-events:none}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-note.active{display:block}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-note p:first-child{margin-top:0}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-note p:last-child{margin-bottom:0}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container{align-items:center;box-sizing:border-box;color:#eee;display:flex;flex-wrap:nowrap;grid-area:info;justify-content:center;overflow:hidden;padding:0 10px}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-page,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-time,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-timer{box-sizing:border-box;display:block;padding:0 10px;white-space:nowrap;width:100%}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container button{height:1.5em;line-height:1.5em;width:1.5em}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-page{order:2;text-align:center}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-page .bespoke-marp-presenter-info-page-text{display:inline-block;min-width:120px;text-align:center}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-time{color:#999;order:1;text-align:left}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-timer{color:#999;order:3;text-align:right}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-timer:hover{cursor:pointer}}@media print{.bespoke-marp-presenter-info-container,.bespoke-marp-presenter-next-container,.bespoke-marp-presenter-note-container{display:none}}</style><style>@charset "UTF-8";@import "https://fonts.bunny.net/css?family=Lato:400,900|Roboto+Mono:400,700&display=swap";div#\:\$p > svg > foreignObject > section{width:1280px;height:720px;box-sizing:border-box;overflow:hidden;position:relative;scroll-snap-align:center center;-webkit-text-size-adjust:100%;text-size-adjust:100%}div#\:\$p > svg > foreignObject > section::after{bottom:0;content:attr(data-marpit-pagination);padding:inherit;pointer-events:none;position:absolute;right:0}div#\:\$p > svg > foreignObject > section:not([data-marpit-pagination])::after{display:none}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1){font-size:2em;margin:0.67em 0}div#\:\$p > svg > foreignObject > section video::-webkit-media-controls{will-change:transform}@page {size:1280px 720px;margin:0}@media print{html, body{background-color:#fff;margin:0;page-break-inside:avoid;break-inside:avoid-page}div#\:\$p > svg > foreignObject > section{page-break-before:always;break-before:page}div#\:\$p > svg > foreignObject > section, div#\:\$p > svg > foreignObject > section *{-webkit-print-color-adjust:exact!important;animation-delay:0s!important;animation-duration:0s!important;color-adjust:exact!important;transition:none!important}div#\:\$p > svg[data-marpit-svg]{display:block;height:100vh;width:100vw}}div#\:\$p > svg > foreignObject > :where(section){container-type:size}div#\:\$p > svg > foreignObject > section img[data-marp-twemoji]{background:transparent;height:1em;margin:0 .05em 0 .1em;vertical-align:-.1em;width:1em}/*!
* Marp / Marpit Gaia theme.
*
* @theme gaia
* @author Yuki Hattori
*
* @auto-scaling true
* @size 16:9 1280px 720px
* @size 4:3 960px 720px
*/div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) code.hljs{display:block;overflow-x:auto;padding:1em}div#\:\$p > svg > foreignObject > section code.hljs{padding:3px 5px}div#\:\$p > svg > foreignObject > section .hljs{background:#000;color:#f8f8f8}div#\:\$p > svg > foreignObject > section .hljs-comment,div#\:\$p > svg > foreignObject > section .hljs-quote{color:#aeaeae;font-style:italic}div#\:\$p > svg > foreignObject > section .hljs-keyword,div#\:\$p > svg > foreignObject > section .hljs-selector-tag,div#\:\$p > svg > foreignObject > section .hljs-type{color:#e28964}div#\:\$p > svg > foreignObject > section .hljs-string{color:#65b042}div#\:\$p > svg > foreignObject > section .hljs-subst{color:#daefa3}div#\:\$p > svg > foreignObject > section .hljs-link,div#\:\$p > svg > foreignObject > section .hljs-regexp{color:#e9c062}div#\:\$p > svg > foreignObject > section .hljs-name,div#\:\$p > svg > foreignObject > section .hljs-section,div#\:\$p > svg > foreignObject > section .hljs-tag,div#\:\$p > svg > foreignObject > section .hljs-title{color:#89bdff}div#\:\$p > svg > foreignObject > section .hljs-class .hljs-title,div#\:\$p > svg > foreignObject > section .hljs-doctag,div#\:\$p > svg > foreignObject > section .hljs-title.class_{text-decoration:underline}div#\:\$p > svg > foreignObject > section .hljs-bullet,div#\:\$p > svg > foreignObject > section .hljs-number,div#\:\$p > svg > foreignObject > section .hljs-symbol{color:#3387cc}div#\:\$p > svg > foreignObject > section .hljs-params,div#\:\$p > svg > foreignObject > section .hljs-template-variable,div#\:\$p > svg > foreignObject > section .hljs-variable{color:#3e87e3}div#\:\$p > svg > foreignObject > section .hljs-attribute{color:#cda869}div#\:\$p > svg > foreignObject > section .hljs-meta{color:#8996a8}div#\:\$p > svg > foreignObject > section .hljs-formula{background-color:#0e2231;color:#f8f8f8;font-style:italic}div#\:\$p > svg > foreignObject > section .hljs-addition{background-color:#253b22;color:#f8f8f8}div#\:\$p > svg > foreignObject > section .hljs-deletion{background-color:#420e09;color:#f8f8f8}div#\:\$p > svg > foreignObject > section .hljs-selector-class{color:#9b703f}div#\:\$p > svg > foreignObject > section .hljs-selector-id{color:#8b98ab}div#\:\$p > svg > foreignObject > section .hljs-emphasis{font-style:italic}div#\:\$p > svg > foreignObject > section .hljs-strong{font-weight:700}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1),div#\:\$p > svg > foreignObject > section :is(h2, marp-h2),div#\:\$p > svg > foreignObject > section :is(h3, marp-h3),div#\:\$p > svg > foreignObject > section :is(h4, marp-h4),div#\:\$p > svg > foreignObject > section :is(h5, marp-h5),div#\:\$p > svg > foreignObject > section :is(h6, marp-h6){margin:.5em 0 0}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1) strong,div#\:\$p > svg > foreignObject > section :is(h2, marp-h2) strong,div#\:\$p > svg > foreignObject > section :is(h3, marp-h3) strong,div#\:\$p > svg > foreignObject > section :is(h4, marp-h4) strong,div#\:\$p > svg > foreignObject > section :is(h5, marp-h5) strong,div#\:\$p > svg > foreignObject > section :is(h6, marp-h6) strong{font-weight:inherit}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1)::part(auto-scaling),div#\:\$p > svg > foreignObject > section :is(h2, marp-h2)::part(auto-scaling),div#\:\$p > svg > foreignObject > section :is(h3, marp-h3)::part(auto-scaling),div#\:\$p > svg > foreignObject > section :is(h4, marp-h4)::part(auto-scaling),div#\:\$p > svg > foreignObject > section :is(h5, marp-h5)::part(auto-scaling),div#\:\$p > svg > foreignObject > section :is(h6, marp-h6)::part(auto-scaling){max-height:580px}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1){font-size:1.8em}div#\:\$p > svg > foreignObject > section :is(h2, marp-h2){font-size:1.5em}div#\:\$p > svg > foreignObject > section :is(h3, marp-h3){font-size:1.3em}div#\:\$p > svg > foreignObject > section :is(h4, marp-h4){font-size:1.1em}div#\:\$p > svg > foreignObject > section :is(h5, marp-h5){font-size:1em}div#\:\$p > svg > foreignObject > section :is(h6, marp-h6){font-size:.9em}div#\:\$p > svg > foreignObject > section blockquote,div#\:\$p > svg > foreignObject > section p{margin:1em 0 0}div#\:\$p > svg > foreignObject > section ol>li,div#\:\$p > svg > foreignObject > section ul>li{margin:.3em 0 0}div#\:\$p > svg > foreignObject > section ol>li>p,div#\:\$p > svg > foreignObject > section ul>li>p{margin:.6em 0 0}div#\:\$p > svg > foreignObject > section code{display:inline-block;font-family:Roboto Mono,monospace;font-size:.8em;letter-spacing:0;margin:-.1em .15em;padding:.1em .2em;vertical-align:baseline}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre){display:block;margin:1em 0 0;overflow:visible}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) code{box-sizing:border-box;font-size:.7em;margin:0;min-width:100%;padding:.5em}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre)::part(auto-scaling){max-height:calc(580px - 1em)}div#\:\$p > svg > foreignObject > section blockquote{margin:1em 0 0;padding:0 1em;position:relative}div#\:\$p > svg > foreignObject > section blockquote:after,div#\:\$p > svg > foreignObject > section blockquote:before{content:"“";display:block;font-family:Times New Roman,serif;font-weight:700;position:absolute}div#\:\$p > svg > foreignObject > section blockquote:before{left:0;top:0}div#\:\$p > svg > foreignObject > section blockquote:after{bottom:0;right:0;transform:rotate(180deg)}div#\:\$p > svg > foreignObject > section blockquote>:first-child{margin-top:0}div#\:\$p > svg > foreignObject > section mark{background:transparent}div#\:\$p > svg > foreignObject > section table{border-collapse:collapse;border-spacing:0;margin:1em 0 0}div#\:\$p > svg > foreignObject > section table td,div#\:\$p > svg > foreignObject > section table th{border-style:solid;border-width:1px;padding:.2em .4em}div#\:\$p > svg > foreignObject > section footer,div#\:\$p > svg > foreignObject > section header,div#\:\$p > svg > foreignObject > section:after{box-sizing:border-box;font-size:66%;height:70px;line-height:50px;overflow:hidden;padding:10px 25px;position:absolute}div#\:\$p > svg > foreignObject > section:after{--marpit-root-font-size:66%;}div#\:\$p > svg > foreignObject > section header{top:0}div#\:\$p > svg > foreignObject > section footer,div#\:\$p > svg > foreignObject > section header{left:0;right:0}div#\:\$p > svg > foreignObject > section footer{bottom:0}div#\:\$p > svg > foreignObject > section{background-color:var(--color-background);background-image:linear-gradient(135deg, hsla(0,0%,53%,0), hsla(0,0%,53%,.02) 50%, hsla(0,0%,100%,0) 0, hsla(0,0%,100%,.05));color:var(--color-foreground);font-family:Lato,Avenir Next,Avenir,Trebuchet MS,Segoe UI,sans-serif;font-size:35px;height:720px;letter-spacing:1.25px;line-height:1.35;padding:70px;width:1280px;word-wrap:break-word;--color-background:#fff8e1;--color-background-stripe:rgba(69,90,100,.1);--color-foreground:#455a64;--color-dimmed:#6a7a7d;--color-highlight:#0288d1;}div#\:\$p > svg > foreignObject > section{--marpit-root-font-size:35px;}div#\:\$p > svg > foreignObject > section:after{bottom:0;font-size:80%;right:0}div#\:\$p > svg > foreignObject > section:after{--marpit-root-font-size:80%;}div#\:\$p > svg > foreignObject > section a,div#\:\$p > svg > foreignObject > section mark{color:var(--color-highlight)}div#\:\$p > svg > foreignObject > section code{background:var(--color-dimmed);color:var(--color-background)}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1) strong,div#\:\$p > svg > foreignObject > section :is(h2, marp-h2) strong,div#\:\$p > svg > foreignObject > section :is(h3, marp-h3) strong,div#\:\$p > svg > foreignObject > section :is(h4, marp-h4) strong,div#\:\$p > svg > foreignObject > section :is(h5, marp-h5) strong,div#\:\$p > svg > foreignObject > section :is(h6, marp-h6) strong{color:var(--color-highlight)}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre){background:var(--color-foreground)}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre)>code{background:transparent}div#\:\$p > svg > foreignObject > section blockquote:after,div#\:\$p > svg > foreignObject > section blockquote:before,div#\:\$p > svg > foreignObject > section footer,div#\:\$p > svg > foreignObject > section header,div#\:\$p > svg > foreignObject > section section:after{color:var(--color-dimmed)}div#\:\$p > svg > foreignObject > section table td,div#\:\$p > svg > foreignObject > section table th{border-color:var(--color-foreground)}div#\:\$p > svg > foreignObject > section table thead th{background:var(--color-foreground);color:var(--color-background)}div#\:\$p > svg > foreignObject > section table tbody>tr:nth-child(odd) td,div#\:\$p > svg > foreignObject > section table tbody>tr:nth-child(odd) th{background:var(--color-background-stripe, transparent)}div#\:\$p > svg > foreignObject > section>:first-child,div#\:\$p > svg > foreignObject > section>header:first-child+*{margin-top:0}div#\:\$p > svg > foreignObject > section:where(.invert){--color-background:#455a64;--color-background-stripe:rgba(255,248,225,.1);--color-foreground:#fff8e1;--color-dimmed:#dad8c8;--color-highlight:#81d4fa;}div#\:\$p > svg > foreignObject > section:where(.gaia){--color-background:#0288d1;--color-background-stripe:rgba(255,248,225,.1);--color-foreground:#fff8e1;--color-dimmed:#cce2de;--color-highlight:#81d4fa;}div#\:\$p > svg > foreignObject > section:where(.lead){align-items:stretch;flex-flow:column nowrap;place-content:safe center center}div#\:\$p > svg > foreignObject > section:where(.lead) :is(h1, marp-h1),div#\:\$p > svg > foreignObject > section:where(.lead) :is(h2, marp-h2),div#\:\$p > svg > foreignObject > section:where(.lead) :is(h3, marp-h3),div#\:\$p > svg > foreignObject > section:where(.lead) :is(h4, marp-h4),div#\:\$p > svg > foreignObject > section:where(.lead) :is(h5, marp-h5),div#\:\$p > svg > foreignObject > section:where(.lead) :is(h6, marp-h6){text-align:center}div#\:\$p > svg > foreignObject > section:where(.lead) p{text-align:center}div#\:\$p > svg > foreignObject > section:where(.lead) blockquote>:is(h1, marp-h1),div#\:\$p > svg > foreignObject > section:where(.lead) blockquote>:is(h2, marp-h2),div#\:\$p > svg > foreignObject > section:where(.lead) blockquote>:is(h3, marp-h3),div#\:\$p > svg > foreignObject > section:where(.lead) blockquote>:is(h4, marp-h4),div#\:\$p > svg > foreignObject > section:where(.lead) blockquote>:is(h5, marp-h5),div#\:\$p > svg > foreignObject > section:where(.lead) blockquote>:is(h6, marp-h6),div#\:\$p > svg > foreignObject > section:where(.lead) blockquote>p{text-align:left}div#\:\$p > svg > foreignObject > section:where(.lead) ol>li>p,div#\:\$p > svg > foreignObject > section:where(.lead) ul>li>p{text-align:left}div#\:\$p > svg > foreignObject > section:where(.lead) table{margin-left:auto;margin-right:auto}div#\:\$p > svg > foreignObject > section img{display:block;margin:0 auto}div#\:\$p > svg > foreignObject > section table{margin-left:auto;margin-right:auto;font-size:25px;width:100%;table-layout:fixed}div#\:\$p > svg > foreignObject > section td{border:1px solid black;text-align:center;padding:10px}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"]{columns:initial!important;display:block!important;padding:0!important}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"]::before, div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"]::after, div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="content"]::before, div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="content"]::after{display:none!important}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"] > div[data-marpit-advanced-background-container]{all:initial;display:flex;flex-direction:row;height:100%;overflow:hidden;width:100%}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"] > div[data-marpit-advanced-background-container][data-marpit-advanced-background-direction="vertical"]{flex-direction:column}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"][data-marpit-advanced-background-split] > div[data-marpit-advanced-background-container]{width:var(--marpit-advanced-background-split, 50%)}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"][data-marpit-advanced-background-split="right"] > div[data-marpit-advanced-background-container]{margin-left:calc(100% - var(--marpit-advanced-background-split, 50%))}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"] > div[data-marpit-advanced-background-container] > figure{all:initial;background-position:center;background-repeat:no-repeat;background-size:cover;flex:auto;margin:0}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"] > div[data-marpit-advanced-background-container] > figure > figcaption{position:absolute;border:0;clip:rect(0, 0, 0, 0);height:1px;margin:-1px;overflow:hidden;padding:0;white-space:nowrap;width:1px}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="content"], div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="pseudo"]{background:transparent!important}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="pseudo"], div#\:\$p > svg[data-marpit-svg] > foreignObject[data-marpit-advanced-background="pseudo"]{pointer-events:none!important}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background-split]{width:100%;height:100%}
</style></head><body><div class="bespoke-marp-osc"><button data-bespoke-marp-osc="prev" tabindex="-1" title="Previous slide">Previous slide</button><span data-bespoke-marp-osc="page"></span><button data-bespoke-marp-osc="next" tabindex="-1" title="Next slide">Next slide</button><button data-bespoke-marp-osc="fullscreen" tabindex="-1" title="Toggle fullscreen (f)">Toggle fullscreen</button><button data-bespoke-marp-osc="presenter" tabindex="-1" title="Open presenter view (p)">Open presenter view</button></div><div id=":$p"><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section data-paginate="true" data-background-color="#fff" data-class="lead" data-theme="gaia" lang="zh-CN" class="lead" data-marpit-pagination="1" style="--paginate:true;--background-color:#fff;--class:lead;--theme:gaia;background-color:#fff;background-image:none;--marpit-advanced-background-split:40%;" data-marpit-pagination-total="21" data-marpit-advanced-background="background" data-marpit-advanced-background-split="right"><div data-marpit-advanced-background-container="true" data-marpit-advanced-background-direction="horizontal"><figure style="background-image:url("images/Java_logo.png");background-size:90%;"></figure></div></section></foreignObject><foreignObject width="60%" height="720"><section id="1" data-paginate="true" data-background-color="#fff" data-class="lead" data-theme="gaia" lang="zh-CN" class="lead" data-marpit-pagination="1" style="--paginate:true;--background-color:#fff;--class:lead;--theme:gaia;background-color:#fff;background-image:none;--marpit-advanced-background-split:40%;" data-marpit-pagination-total="21" data-marpit-advanced-background="content" data-marpit-advanced-background-split="right">
<h1 id="java%E9%AB%98%E7%BA%A7%E7%A8%8B%E5%BA%8F%E8%AE%BE%E8%AE%A1">Java高级程序设计</h1>
<h2 id="%E6%B3%A8%E8%A7%A3">注解</h2>
</section>
</foreignObject><foreignObject width="1280" height="720" data-marpit-advanced-background="pseudo"><section data-paginate="true" data-background-color="#fff" data-class="lead" data-theme="gaia" lang="zh-CN" class="lead" data-marpit-pagination="1" style="" data-marpit-pagination-total="21" data-marpit-advanced-background="pseudo" data-marpit-advanced-background-split="right"></section></foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="2" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="2" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="%E6%B3%A8%E8%A7%A3-1">注解</h2>
<ul>
<li>从JavaSE 1.5开始，Java增加了对元数据的支持，也就是Annotation
<ul>
<li>元数据是关于数据的数据。在编程语言上下文中，元数据是添加到程序元素如方法、字段、类和包上的额外信息，对数据进行说明描述的数据</li>
</ul>
</li>
<li>Annotation其实就是对代码的一种特殊标记，这些标记可以在编译，类加载和运行时被读取，并执行相应的处理</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="3" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="3" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="%E5%9F%BA%E6%9C%AC%E7%9A%84annotation">基本的Annotation</h2>
<ul>
<li><code>@Override</code> — 限定重写父类方法</li>
<li><code>@Deprecated</code> — 标示已过时</li>
<li><code>@SuppressWarning</code> — 抑制编译器警告</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="4" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="4" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="override">@Override</h2>
<ul>
<li>用于告知编译器，需要覆写父类的当前方法
<ul>
<li>如果某个方法带有该注解但并没有覆写父类相应的方法，则编译器会生成一条错误信息</li>
<li><code>@Override</code>可适用元素为方法</li>
</ul>
</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="5" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="5" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="deprecated">@Deprecated</h2>
<ul>
<li>使用这个注解，用于告知编译器，某一程序元素(比如方法，成员变量)不建议使用了（即过时了）</li>
<li>调用具有该注解的方法时编译器会出现警告，告知该方法已过时。</li>
<li><code>@Deprecated</code>可适合用于除注解类型声明之外的所有元素</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="6" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="6" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="suppresswarnings">@SuppressWarnings</h2>
<ul>
<li>用于告知编译器忽略特定的警告信息
<ul>
<li>例在泛型中使用原生数据类型，编译器会发出警告，当使用该注解后，则不会发出警告</li>
</ul>
</li>
<li>该注解有方法value(）属性,可支持多个字符串参数，用户指定忽略哪种警告
<ul>
<li><code>@SupressWarning(value={"uncheck","deprecation"})</code></li>
</ul>
</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="7" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="7" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="values">Values</h2>
<table>
<thead>
<tr>
<th style="text-align:left">参数</th>
<th style="text-align:left">含义</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:left">deprecation</td>
<td style="text-align:left">使用了过时的类或方法</td>
</tr>
<tr>
<td style="text-align:left">unchecked</td>
<td style="text-align:left">执行了未检查的转换</td>
</tr>
<tr>
<td style="text-align:left">fallthrough</td>
<td style="text-align:left">switch块缺少了break</td>
</tr>
<tr>
<td style="text-align:left">fianlly</td>
<td style="text-align:left">任意finally子句不能正常完成</td>
</tr>
<tr>
<td style="text-align:left">...</td>
<td style="text-align:left">...</td>
</tr>
<tr>
<td style="text-align:left">all</td>
<td style="text-align:left">以上所有情况</td>
</tr>
</tbody>
</table>
<p><code>javac -X</code></p>
<p><small><a href="https://docs.oracle.com/javase/8/docs/technotes/tools/windows/javac.html">https://docs.oracle.com/javase/8/docs/technotes/tools/windows/javac.html</a></small></p>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="8" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="8" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="%E5%85%83annotation">元Annotation</h2>
<ul>
<li>元Annotation就是修饰其他Annotation的Annotation</li>
<li>Java除了在<code>java.lang</code>提供了上述内建注解外，还在<code>java.lang.annotation</code>包下提供了6个Meta Annotation(元Annotataion)
<ul>
<li>其中有5个元Annotation都用于修饰其他的Annotation定义，<code>@Repeatable</code>专门用户定义Java 8新增的可重复注解</li>
</ul>
</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="9" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="9" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="annotation-type-override">Annotation Type Override</h2>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-java"><span class="hljs-meta">@Target(value=METHOD)</span>
<span class="hljs-meta">@Retention(value=SOURCE)</span>
<span class="hljs-keyword">public</span> <span class="hljs-meta">@interface</span> Override {
}
</code></pre>
<p><small><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Override.html">https://docs.oracle.com/javase/8/docs/api/java/lang/Override.html</a></small></p>
<p>其中<code>@interface</code>定义了<code>Override</code>是一个Annotation类型，或者叫元数据(meta-data)。 <code>@Target</code>和<code>@Retetion</code>是对<code>@Override</code>的注解，称之为元注解(注解的注解)。</p>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="10" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="10" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="target%E7%9A%84%E5%AE%9A%E4%B9%89">@Target的定义</h2>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-java"><span class="hljs-keyword">package</span> java.lang.annotation;
<span class="hljs-meta">@Documented</span>
<span class="hljs-meta">@Retention(RetentionPolicy.RUNTIME)</span>
<span class="hljs-meta">@Target(ElementType.ANNOTATION_TYPE)</span>
<span class="hljs-keyword">public</span> <span class="hljs-meta">@interface</span> Target {
<span class="hljs-comment">/**
* Returns an array of the kinds of elements an annotation type can be applied to.
* <span class="hljs-doctag">@return</span> an array of the kinds of elements an annotation type can be applied to
*/</span>
ElementType[] value();
}
</code></pre>
<p><small><code>Target</code>也是一个注解类型，在其内部定义了方法<code>ElementType[] value();</code>返回值就是<code>@Target(ElementType.METHOD)</code>中的<code>ElementType.METHOD</code>，也就是注解的属性，是一个<code>ElementType</code>枚举。</small></p>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="11" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="11" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="elementtype">ElementType</h2>
<p><small>这个枚举其实就是定义了注解的适用范围，在<code>Override</code>注解中，<code>@Target</code>的属性是<code>ElementType.METHOD</code>,所以<code>Override</code>这个注解只能用于注解方法。</small></p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-java"><span class="hljs-keyword">public</span> <span class="hljs-keyword">enum</span> <span class="hljs-title class_">ElementType</span> {
<span class="hljs-comment">/** Class, interface (including annotation type), or enum declaration */</span>
TYPE,
<span class="hljs-comment">/** Field declaration (includes enum constants) */</span>
FIELD,
<span class="hljs-comment">/** Method declaration */</span>
METHOD,
<span class="hljs-comment">/** Formal parameter declaration */</span>
PARAMETER,
<span class="hljs-comment">/** Constructor declaration */</span>
CONSTRUCTOR,
<span class="hljs-comment">/** Local variable declaration */</span>
LOCAL_VARIABLE,
<span class="hljs-comment">/** Annotation type declaration */</span>
ANNOTATION_TYPE,
<span class="hljs-comment">/** Package declaration */</span>
PACKAGE,
<span class="hljs-comment">/** Type parameter declaration */</span>
TYPE_PARAMETER,
<span class="hljs-comment">/** Use of a type */</span>
TYPE_USE
}
</code></pre>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="12" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="12" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="%E5%86%8D%E7%9C%8Btarget">再看@Target</h2>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-java"><span class="hljs-keyword">package</span> java.lang.annotation;
<span class="hljs-meta">@Documented</span>
<span class="hljs-meta">@Retention(RetentionPolicy.RUNTIME)</span>
<span class="hljs-meta">@Target(ElementType.ANNOTATION_TYPE)</span>
<span class="hljs-keyword">public</span> <span class="hljs-meta">@interface</span> Target {
<span class="hljs-comment">/**
* Returns an array of the kinds of elements an annotation type can be applied to.
* <span class="hljs-doctag">@return</span> an array of the kinds of elements an annotation type can be applied to
*/</span>
ElementType[] value();
}
</code></pre>
<p><small>而<code>Target</code>注解本身也有一个<code>@Target</code>元注解，这个<code>@Target</code>元注解属性是<code>ElementType.ANNOTATION_TYPE</code>，也就是说<code>Target</code>注解只能用作元数据(注解)的注解，所以叫它元注解。</small></p>
<p><small><code>@Retention(RetentionPolicy.RUNTIME)</code>? <code>@Documented</code>?</small></p>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="13" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="13" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="retention">@Retention</h2>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-java"><span class="hljs-keyword">package</span> java.lang.annotation;
<span class="hljs-meta">@Documented</span>
<span class="hljs-meta">@Retention(RetentionPolicy.RUNTIME)</span>
<span class="hljs-meta">@Target(ElementType.ANNOTATION_TYPE)</span>
<span class="hljs-keyword">public</span> <span class="hljs-meta">@interface</span> Retention {
<span class="hljs-comment">/**
* Returns the retention policy.
* <span class="hljs-doctag">@return</span> the retention policy
*/</span>
RetentionPolicy <span class="hljs-title function_">value</span><span class="hljs-params">()</span>;
}
</code></pre>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="14" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="14" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="retentionpolicy">RetentionPolicy</h2>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-java"><span class="hljs-keyword">public</span> <span class="hljs-keyword">enum</span> <span class="hljs-title class_">RetentionPolicy</span> {
<span class="hljs-comment">/**
* Annotations are to be discarded by the compiler.
*/</span>
SOURCE,
<span class="hljs-comment">/**
* Annotations are to be recorded in the class file by the compiler but need not be retained by the VM at run time. This is the default behavior.
*/</span>
CLASS,
<span class="hljs-comment">/**
* Annotations are to be recorded in the class file by the compiler and retained by the VM at run time, so they may be read reflectively.
*/</span>
RUNTIME
}
</code></pre>
<p><small><code>@Retention</code>注解则定义了注解的保留范围，如:在源代码、CLASS文件或运行时保留。超出<code>@Retention</code>定义的属性，注解将被丢弃。</small></p>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="15" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="15" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="documented">@Documented</h2>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-java"><span class="hljs-keyword">package</span> java.lang.annotation;
<span class="hljs-meta">@Documented</span>
<span class="hljs-meta">@Retention(RetentionPolicy.RUNTIME)</span>
<span class="hljs-meta">@Target(ElementType.ANNOTATION_TYPE)</span>
<span class="hljs-keyword">public</span> <span class="hljs-meta">@interface</span> Documented {
}
</code></pre>
<p><small>如果一个注解定义了<code>@Ducumented</code>，在<a href="http://www.oracle.com/technetwork/articles/java/index-137868.html">javadoc</a>生成API文档时，被这个注解标记的元素在文档上也会出现该注解。</small></p>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="16" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;--marpit-advanced-background-split:40%;" data-marpit-pagination-total="21" data-marpit-advanced-background="background" data-marpit-advanced-background-split="right"><div data-marpit-advanced-background-container="true" data-marpit-advanced-background-direction="horizontal"><figure style="background-image:url("https://i.stack.imgur.com/QLm1F.png");background-size:80%;"></figure></div></section></foreignObject><foreignObject width="60%" height="720"><section id="16" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="16" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;--marpit-advanced-background-split:40%;" data-marpit-pagination-total="21" data-marpit-advanced-background="content" data-marpit-advanced-background-split="right">
<h2 id="%E4%BE%8B">例</h2>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-java"><span class="hljs-meta">@Documented</span>
<span class="hljs-meta">@Inherited</span>
<span class="hljs-meta">@Retention(RetentionPolicy.RUNTIME)</span>
<span class="hljs-keyword">public</span> <span class="hljs-meta">@interface</span> InWork {
String <span class="hljs-title function_">value</span><span class="hljs-params">()</span>;
}
<span class="hljs-comment">/**
* Annotated class.
*/</span>
<span class="hljs-meta">@InWork(value = "")</span>
<span class="hljs-keyword">public</span> <span class="hljs-keyword">class</span> <span class="hljs-title class_">MainApp</span> {...}
</code></pre>
</section>
</foreignObject><foreignObject width="1280" height="720" data-marpit-advanced-background="pseudo"><section data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="16" style="" data-marpit-pagination-total="21" data-marpit-advanced-background="pseudo" data-marpit-advanced-background-split="right"></section></foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="17" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="17" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="inherited">@Inherited</h2>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-java"><span class="hljs-meta">@Documented</span>
<span class="hljs-meta">@Retention(RetentionPolicy.RUNTIME)</span>
<span class="hljs-meta">@Target(ElementType.ANNOTATION_TYPE)</span>
<span class="hljs-keyword">public</span> <span class="hljs-meta">@interface</span> Inherited {
}
</code></pre>
<p><small>只对<code>@Target</code>为<code>ElementType.TYPE</code>(类、接口、枚举)有效，并且只支持类元素。使用了<code>@Inherited</code>的注解修饰在一个class上，可以保证继承它的子类也拥有同样的注解。</small></p>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="18" data-paginate="true" data-background-color="#fff" data-theme="gaia" lang="zh-CN" data-marpit-pagination="18" style="--paginate:true;--background-color:#fff;--theme:gaia;background-color:#fff;background-image:none;" data-marpit-pagination-total="21">
<h2 id="%E8%87%AA%E5%AE%9A%E4%B9%89%E6%B3%A8%E8%A7%A3">自定义注解</h2>
<p>使用<code>@interface</code>可以定义一个注解</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-java"><span class="hljs-meta">@Documented</span>
<span class="hljs-meta">@Target(ElementType.METHOD)</span>
<span class="hljs-meta">@Inherited</span>
<span class="hljs-meta">@Retention(RetentionPolicy.RUNTIME)</span>
<span class="hljs-keyword">public</span> <span class="hljs-meta">@interface</span> AuthorAnno{
<span class="hljs-comment">//以下无参方法实际上定义的是注解的属性</span>
<span class="hljs-comment">//其返回值可以是所有基本类型、String、Class、enum、Annotation或以上类型的数组</span>
String <span class="hljs-title function_">name</span><span class="hljs-params">()</span>;
<span class="hljs-comment">//default关键字可以定义该属性的默认值，如果没有指定默认值在使用注解时必须显示指定属性值</span>
String <span class="hljs-title function_">website</span><span class="hljs-params">()</span> <span class="hljs-keyword">default</span> <span class="hljs-string">"hello"</span>;
<span class="hljs-type">int</span> <span class="hljs-title function_">revision</span><span class="hljs-params">()</span> <span class="hljs-keyword">default</span> <span class="hljs-number">1</span>;
}
</code></pre>
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<h2 id="%E4%BD%BF%E7%94%A8%E8%87%AA%E5%AE%9A%E4%B9%89%E6%B3%A8%E8%A7%A3">使用自定义注解</h2>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-java"><span class="hljs-keyword">public</span> <span class="hljs-keyword">class</span> <span class="hljs-title class_">AnnotationDemo</span> {
<span class="hljs-meta">@AuthorAnno(name="lvr", website="hello", revision=1)</span>
<span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">main</span><span class="hljs-params">(String[] args)</span> {
System.out.println(<span class="hljs-string">"I am main method"</span>);
}
<span class="hljs-meta">@SuppressWarnings({ "unchecked", "deprecation" })</span>
<span class="hljs-meta">@AuthorAnno(name="lvr", website="hello", revision=2)</span>
<span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">demo</span><span class="hljs-params">()</span>{
System.out.println(<span class="hljs-string">"I am demo method"</span>);
}
}
</code></pre>
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<h2 id="%E6%B3%A8%E8%A7%A3%E8%A7%A3%E6%9E%90">注解解析</h2>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-java"><span class="hljs-keyword">public</span> <span class="hljs-keyword">class</span> <span class="hljs-title class_">AnnotationParser</span> {
<span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">main</span><span class="hljs-params">(String[] args)</span> <span class="hljs-keyword">throws</span> SecurityException, ClassNotFoundException {
Method[] demoMethod = AnnotationDemo.class.getMethods();
<span class="hljs-keyword">for</span> (Method method : demoMethod) {
<span class="hljs-keyword">if</span> (method.isAnnotationPresent(AuthorAnno.class)) {
<span class="hljs-type">AuthorAnno</span> <span class="hljs-variable">annotationInfo</span> <span class="hljs-operator">=</span> method.getAnnotation(AuthorAnno.class);
System.out.println(<span class="hljs-string">"method: "</span>+ method);
System.out.println(<span class="hljs-string">"name= "</span>+ annotationInfo.name() +
<span class="hljs-string">" , website= "</span>+ annotationInfo.website()
+ <span class="hljs-string">" , revision= "</span>+annotationInfo.revision());
}
}
}
}
</code></pre>
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