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<meta property="og:url" content="https://javabetter.cn/szjy/tupian-zhuanlian.html"><meta property="og:site_name" content="二哥的Java进阶之路"><meta property="og:description" content="作为一名技术博主，经常需要把同一份 MD 文件同步到不同的博客平台，以求获得更多的曝光，从而帮助到更多的小伙伴——瞧我这“达则兼济天下”的雄心壮志。像 CSDN 和掘金这两个博客平台都有自己的外链图片解析功能。 当我把 MD 源文档复制到 CSDN 或者掘金的编辑器中，它们会自动地帮我把外链转成内链，这样我就不用再重新上传图片，也不需要配置自己的图床了，否则图片会因为防盗链的原因显示不出来。 举个例子，现在有这样一段 MD 文档，里面有一张图片。 "><meta property="og:type" content="article"><meta property="og:locale" content="zh-CN"><meta property="og:updated_time" content="2023-07-13T11:49:02.000Z"><meta property="article:author" content="沉默王二"><meta property="article:modified_time" content="2023-07-13T11:49:02.000Z"><script type="application/ld+json">{"@context":"https://schema.org","@type":"Article","headline":"","image":[""],"dateModified":"2023-07-13T11:49:02.000Z","author":[{"@type":"Person","name":"沉默王二","url":"/about-the-author/"}]}</script><meta name="robots" content="all"><meta name="author" content="沉默王二"><meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate"><meta http-equiv="Pragma" content="no-cache"><meta http-equiv="Expires" content="0"><meta name="keywords" content="Java, Java基础, 并发编程, JVM, 虚拟机, 数据库, MySQL, Spring, Redis, MyBatis, SpringBoot, IDEA, 求职面试, 面渣逆袭, 学习路线"><meta name="apple-mobile-web-app-capable" content="yes"><script>
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href="/home.html"><!---->一、前言<!----></a><ul class="vp-sidebar-sub-headers"></ul><!--]--></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-heading clickable" type="button"><!----><span class="vp-sidebar-title">二、Java基础</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-heading clickable" type="button"><!----><span class="vp-sidebar-title">三、Java进阶</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-heading clickable" type="button"><!----><span class="vp-sidebar-title">四、MySQL</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-heading clickable" type="button"><!----><span class="vp-sidebar-title">五、Redis</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-heading clickable" type="button"><!----><span class="vp-sidebar-title">六、计算机基础</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-heading clickable" type="button"><!----><span class="vp-sidebar-title">七、求职面试</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-heading clickable" type="button"><!----><span class="vp-sidebar-title">八、学习建议</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-heading clickable" type="button"><!----><span class="vp-sidebar-title">九、知识库搭建</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-heading clickable" type="button"><!----><span class="vp-sidebar-title">十、联系作者</span><span class="vp-arrow end"></span></button><!----></section></li></ul><!--[--><!----><!--]--></aside><!--[--><main id="main-content" class="vp-page"><!--[--><!----><!----><nav class="vp-breadcrumb disable"></nav><div class="vp-page-title"><h1><!----></h1><div class="page-info"><span class="page-author-info" aria-label="作者🖊" data-balloon-pos="down"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="page-author-item" href="/about-the-author/" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="page-date-info" aria-label="写作日期📅" 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content="2022-03-07T00:34:41.000Z"></span><!----><!----><span class="page-word-info" aria-label="字数🔠" data-balloon-pos="down"><svg xmlns="http://www.w3.org/2000/svg" class="icon word-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="word icon"><path d="M518.217 432.64V73.143A73.143 73.143 0 01603.43 1.097a512 512 0 01419.474 419.474 73.143 73.143 0 01-72.046 85.212H591.36a73.143 73.143 0 01-73.143-73.143z"></path><path d="M493.714 566.857h340.297a73.143 73.143 0 0173.143 85.577A457.143 457.143 0 11371.566 117.76a73.143 73.143 0 0185.577 73.143v339.383a36.571 36.571 0 0036.571 36.571z"></path></svg><span>约 1540 字</span><meta property="wordCount" content="1540"></span><span class="page-reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 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class="toc-header">此页内容<button type="button" class="print-button" title="打印"><svg xmlns="http://www.w3.org/2000/svg" class="icon print-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="print icon"><path d="M819.2 364.8h-44.8V128c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v236.8h-44.8C145.067 364.8 96 413.867 96 473.6v192c0 59.733 49.067 108.8 108.8 108.8h44.8V896c0 17.067 14.933 32 32 32h460.8c17.067 0 32-14.933 32-32V774.4h44.8c59.733 0 108.8-49.067 108.8-108.8v-192c0-59.733-49.067-108.8-108.8-108.8zM313.6 160h396.8v204.8H313.6V160zm396.8 704H313.6V620.8h396.8V864zM864 665.6c0 25.6-19.2 44.8-44.8 44.8h-44.8V588.8c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v121.6h-44.8c-25.6 0-44.8-19.2-44.8-44.8v-192c0-25.6 19.2-44.8 44.8-44.8h614.4c25.6 0 44.8 19.2 44.8 44.8v192z"></path></svg></button></div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a class="vp-link toc-link level3" href="/#二、关于-java-爬虫">二、关于 Java 爬虫</a></li><!----><!--]--><!--[--><li class="toc-item"><a class="vp-link toc-link level3" href="/#三、实战-jsoup">三、实战 jsoup</a></li><!----><!--]--><!--[--><li class="toc-item"><a class="vp-link toc-link level3" href="/#四、下载图片">四、下载图片</a></li><!----><!--]--><!--[--><li class="toc-item"><a class="vp-link toc-link level3" href="/#五、使用-cdn-加速图片">五、使用 CDN 加速图片</a></li><!----><!--]--><!--[--><li class="toc-item"><a class="vp-link toc-link level3" href="/#六、一点小心得">六、一点小心得</a></li><!----><!--]--></ul><div class="toc-marker" style="top:-1.7rem;"></div></div><!--[--><!----><!--]--></aside></div><!----><div class="theme-hope-content"><p>作为一名技术博主，经常需要把同一份 MD 文件同步到不同的博客平台，以求获得更多的曝光，从而帮助到更多的小伙伴——瞧我这“达则兼济天下”的雄心壮志。像 CSDN 和掘金这两个博客平台都有自己的外链图片解析功能。</p><p>当我把 MD 源文档复制到 CSDN 或者掘金的编辑器中，它们会自动地帮我把外链转成内链，这样我就不用再重新上传图片，也不需要配置自己的图床了，否则图片会因为防盗链的原因显示不出来。</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>举个例子，现在有这样一段 MD 文档，里面有一张图片。
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>把上面的 MD 文档复制到掘金编辑器的时候，就会出现「图片解析中...」！但会一直卡在这里，再也解析不下去了。</p><figure><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-2.png" alt="" tabindex="0" loading="lazy"><figcaption></figcaption></figure><p>这是因为图片加了防盗链，掘金这么牛逼的社区在解析的时候也会失败。CSDN 的转链功能更牛逼一点，基本上可以无视防盗链。</p><figure><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-3.png" alt="" tabindex="0" loading="lazy"><figcaption></figcaption></figure><p>还有一些博客平台是没有转链功能的，比如说二哥的静态小破站《二哥的Java进阶之路》。怎么办呢？我一开始的解决方案是：</p><ul><li>先将图片手动一张张下载到本地</li><li>再将本地图片上传到 GitHub 指定的仓库</li><li>修改 MD 文档中的图片链接，使用 CDN 加速服务</li></ul><p>这样就能解决问题，但是需要手动去做这些重复的动作，尤其遇到一篇文章有二三十张图片的时候就很烦。这有点丧失我作为程序员的尊严啊！</p><p>首先要解决的是图片下载的问题，可以利用爬虫技术：爬虫爬得早，局子进的早。</p><figure><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-4.png" alt="" tabindex="0" loading="lazy"><figcaption></figcaption></figure><h3 id="二、关于-java-爬虫" tabindex="-1"><a class="header-anchor" href="#二、关于-java-爬虫" aria-hidden="true">#</a> 二、关于 Java 爬虫</h3><p>Java 爬虫的类库非常多，比如说 crawler4j，我个人更喜欢 jsoup，它更轻量级。jsoup 是一款用于解析 HTML 的 Java 类库，提供了一套非常便捷的 API，用于提取和操作数据。</p><blockquote><p>官网地址：<a href="https://jsoup.org/" target="_blank" rel="noopener noreferrer">https://jsoup.org/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>jsoup 目前在 GitHub 上已经收获 9.3k+ 的 star，可以说是非常的受欢迎了。</p><figure><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-5.png" alt="" tabindex="0" loading="lazy"><figcaption></figcaption></figure><p>jsoup 有以下特性：</p><ul><li>可以从 URL、文件或者字符串中抓取和解析</li><li>可以使用 DOM 遍历或者 CSS 选择器查找和提取数据</li><li>可以操作 HTML 元素、属性和文本</li><li>可以输出整洁的 HTML</li></ul><h3 id="三、实战-jsoup" tabindex="-1"><a class="header-anchor" href="#三、实战-jsoup" aria-hidden="true">#</a> 三、实战 jsoup</h3><p><strong>第一步，添加 jsoup 依赖到项目中</strong>。</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code><dependency>
<!-- jsoup HTML parser library @ https://jsoup.org/ -->
<groupId>org.jsoup</groupId>
<artifactId>jsoup</artifactId>
<version>1.14.3</version>
</dependency>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>第二步， 获取网页文档</strong>。</p><p>就拿二哥之前发表的一篇文章《<a href="https://mp.weixin.qq.com/s/NtOD5q95xPEs4aQpu4lGcg" target="_blank" rel="noopener noreferrer">二哥的小破站终于上线了，颜值贼高<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》来举例吧。通过以下代码就可以拿到网页文档了。</p><div class="language-java line-numbers-mode" data-ext="java"><pre class="language-java"><code><span class="token class-name">Document</span> doc <span class="token operator">=</span> <span class="token class-name">Jsoup</span><span class="token punctuation">.</span><span class="token function">connect</span><span class="token punctuation">(</span><span class="token string">"https://blog.csdn.net/qing_gee/article/details/122407829"</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">String</span> title <span class="token operator">=</span> doc<span class="token punctuation">.</span><span class="token function">title</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>Jsoup 类是 jsoup 的入口类，通过 connect 方法可以从指定链接中加载 HTML 文档（用 Document 对象来表示）。</p><p><strong>第三步，获取图片节点</strong>。</p><p>再通过以下代码可以获取文章所有的图片节点：</p><div class="language-java line-numbers-mode" data-ext="java"><pre class="language-java"><code><span class="token class-name">Elements</span> images <span class="token operator">=</span> doc<span class="token punctuation">.</span><span class="token function">select</span><span class="token punctuation">(</span><span class="token string">".article_content img[src~=(?i)\\.(png|jpe?g|gif)]"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token class-name">Element</span> image <span class="token operator">:</span> images<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">"src : "</span> <span class="token operator">+</span> image<span class="token punctuation">.</span><span class="token function">attr</span><span class="token punctuation">(</span><span class="token string">"src"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>输出结构如下所示：</p><figure><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-6.png" alt="" tabindex="0" loading="lazy"><figcaption></figcaption></figure><h3 id="四、下载图片" tabindex="-1"><a class="header-anchor" href="#四、下载图片" aria-hidden="true">#</a> 四、下载图片</h3><p>拿到图片的 URL 地址后，事情就好办了，可以直接通过 JDK 的原生 API 下载图片到指定文件夹。</p><div class="language-java line-numbers-mode" data-ext="java"><pre class="language-java"><code><span class="token class-name">String</span> downloadPath <span class="token operator">=</span> <span class="token string">"/tobebetterjavaer-beian-"</span><span class="token punctuation">;</span>
<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token class-name">Element</span> image <span class="token operator">:</span> images<span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token class-name">URL</span> url <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">URL</span><span class="token punctuation">(</span>image<span class="token punctuation">.</span><span class="token function">attr</span><span class="token punctuation">(</span><span class="token string">"src"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">InputStream</span> inputStream <span class="token operator">=</span> url<span class="token punctuation">.</span><span class="token function">openStream</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">OutputStream</span> outputStream <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">FileOutputStream</span><span class="token punctuation">(</span>downloadPath <span class="token operator">+</span> i <span class="token operator">+</span> <span class="token string">".png"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">byte</span><span class="token punctuation">[</span><span class="token punctuation">]</span> buffer <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token keyword">byte</span><span class="token punctuation">[</span><span class="token number">2048</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token keyword">int</span> length <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token keyword">while</span> <span class="token punctuation">(</span><span class="token punctuation">(</span>length <span class="token operator">=</span> inputStream<span class="token punctuation">.</span><span class="token function">read</span><span class="token punctuation">(</span>buffer<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">!=</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
outputStream<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span>buffer<span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> length<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>如果想加快节奏的话，可以把上面的代码封装一下，然后开个多线程，简单点的话，可以每张图片起一个线程，速度杠杠的。</p><div class="language-java line-numbers-mode" data-ext="java"><pre class="language-java"><code><span class="token keyword">new</span> <span class="token class-name">Thread</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">MyRunnable</span><span class="token punctuation">(</span>originImgUrl<span class="token punctuation">,</span> destinationImgPath<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">start</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="五、使用-cdn-加速图片" tabindex="-1"><a class="header-anchor" href="#五、使用-cdn-加速图片" aria-hidden="true">#</a> 五、使用 CDN 加速图片</h3><p>图片下载到本地后，接下来的工作就更简单了，读取原 MD 文档，修改图片链接，使用 CDN 进行加速。我的图床采用的是 GitHub+jsDelivr CDN 的方式，不过由于 jsDelivr 的国内节点逐渐撤离了，图片在某些网络环境下访问的时候还是有点慢，后面打算用 OSS+CDN 的方式，更靠谱一点。</p><p>读取文件可以借助一下 hutool 这款 GitHub 上开源的工具类库，省去很多繁琐的 IO 操作。</p><blockquote><p>官网：<a href="https://hutool.cn/" target="_blank" rel="noopener noreferrer">https://hutool.cn/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>第一步，将 hutool 添加到 pom.xml 文件中</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code><dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>5.7.20</version>
</dependency>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>第二步，按照行读取 MD 文件，需要用到 hutool 的 FileReader 类：</p><div class="language-java line-numbers-mode" data-ext="java"><pre class="language-java"><code><span class="token class-name">FileReader</span> fileReader <span class="token operator">=</span> <span class="token class-name">FileReader</span><span class="token punctuation">.</span><span class="token function">create</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">File</span><span class="token punctuation">(</span>docPath <span class="token operator">+</span>fileName<span class="token punctuation">)</span><span class="token punctuation">,</span>
<span class="token class-name">Charset</span><span class="token punctuation">.</span><span class="token function">forName</span><span class="token punctuation">(</span><span class="token string">"utf-8"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">List</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> list <span class="token operator">=</span> fileReader<span class="token punctuation">.</span><span class="token function">readLines</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>第三步，通过正则表达式来匹配是否有需要替换的图片标签，MD 中的图片标记关键字为 <code>![]()</code>。</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>如果匹配到，就替换为 jsDelivr CDN 链接的地址，写文件时需要用到 hutool 的FileWriter 类。</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>FileWriter writer = new FileWriter(docPath + fileName);
for (String line : list) {
Matcher m = pattern.matcher(line);
if (m.matches()) {
writer.append("![](" + imgCdnPre + num + imgSuffix +")\n");
} else {
writer.append(line+"\n");
}
}
writer.flush();
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>到此为止，整个代码的编写工作就告一段落了。很简单，两个类库，几行代码就搞定了！</p><p>转换前的 MD 文件如下所示：</p><figure><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-8.png" alt="" tabindex="0" loading="lazy"><figcaption></figcaption></figure><p>运行代码转换后，发现图片地址已经变成 jsDelivr CDN 图库了。</p><figure><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-9.png" alt="" tabindex="0" loading="lazy"><figcaption></figcaption></figure><p>使用 GitHub 桌面版把图片和 MD 文档提交到 GitHub 仓库后，就可以看到图片已经加载完成可以访问了。</p><figure><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-10.png" alt="" tabindex="0" loading="lazy"><figcaption></figcaption></figure><h3 id="六、一点小心得" tabindex="-1"><a class="header-anchor" href="#六、一点小心得" aria-hidden="true">#</a> 六、一点小心得</h3><p>不得不说，懂点技术，还是非常爽的。撸了几行代码，解放了双手，可以干点正经事了（狗头）。</p><p>这不，重新把《二哥的Java进阶之路》的小破站整理排版了一下，新增了不少优质的内容。学习 Java 的小伙伴可以开卷了，有需要增加的内容也欢迎提交 issue 啊！</p><figure><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-11.png" alt="" tabindex="0" loading="lazy"><figcaption></figcaption></figure><p>再次感谢各位小伙伴的厚爱，我也会一如既往地完善这个专栏，我们下期见~</p><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/szjy/tupian-zhuanlian.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item git-info"><div class="update-time"><span class="label">上次编辑于: </span><!----></div><div class="contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: [email protected]">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: [email protected]">沉默王二</span><!--]--><!--]--></div></div></footer><!----><div id="comment" class="giscus-wrapper input-top" style="display:none;"><div class="loading-icon-wrapper" style="display:flex;align-items:center;justify-content:center;height:96px"><svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" preserveAspectRatio="xMidYMid" viewBox="25 25 50 50"><animateTransform attributeName="transform" type="rotate" dur="2s" keyTimes="0;1" repeatCount="indefinite" values="0;360"></animateTransform><circle cx="50" cy="50" r="20" fill="none" stroke="currentColor" stroke-width="4" stroke-linecap="round"><animate attributeName="stroke-dasharray" dur="1.5s" keyTimes="0;0.5;1" repeatCount="indefinite" values="1,200;90,200;1,200"></animate><animate attributeName="stroke-dashoffset" dur="1.5s" keyTimes="0;0.5;1" repeatCount="indefinite" values="0;-35px;-125px"></animate></circle></svg></div></div><!----><!--]--></main><!--]--><footer class="vp-footer-wrapper"><div class="vp-footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-4</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="vp-copyright">Copyright © 2024 沉默王二</div></footer></div><!--]--><!----><!----><!--]--></div>
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