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@shixinde/vuepress-theme-init

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shixindea.github.io/guoguo-notes/

shixindea/guoguo-notes

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import{_ as n,c as s,o as a,a as p}from"./app-Dx9bNbfq.js";const t={},e=p(`<h2 id="图片转base64" tabindex="-1"><a class="header-anchor" href="#图片转base64"><span>图片转base64</span></a></h2><div class="language-java line-numbers-mode" data-highlighter="prismjs" data-ext="java" data-title="java"><pre class="language-java"><code><span class="line">res<span class="token punctuation">.</span><span class="token function">setImg</span><span class="token punctuation">(</span><span class="token function">preview</span><span class="token punctuation">(</span>res<span class="token punctuation">.</span><span class="token function">getImg</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> <span class="line"></span> <span class="line"></span> <span class="line"></span> <span class="line"><span class="token keyword">public</span> <span class="token class-name">String</span> <span class="token function">preview</span><span class="token punctuation">(</span><span class="token class-name">String</span> name<span class="token punctuation">)</span> <span class="token punctuation">{</span></span> <span class="line"> <span class="token keyword">try</span> <span class="token punctuation">{</span></span> <span class="line"> <span class="token class-name">String</span> imagePath <span class="token operator">=</span> <span class="token string">&quot;D:\\\\java-upload-Pic\\\\&quot;</span> <span class="token operator">+</span> name<span class="token punctuation">;</span></span> <span class="line"> <span class="token class-name">File</span> imageFile <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">File</span><span class="token punctuation">(</span>imagePath<span class="token punctuation">)</span><span class="token punctuation">;</span></span> <span class="line"></span> <span class="line"> <span class="token keyword">if</span> <span class="token punctuation">(</span>imageFile<span class="token punctuation">.</span><span class="token function">exists</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></span> <span class="line"> <span class="token class-name">FileInputStream</span> fileInputStream <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">FileInputStream</span><span class="token punctuation">(</span>imageFile<span class="token punctuation">)</span><span class="token punctuation">;</span></span> <span class="line"> <span class="token keyword">byte</span><span class="token punctuation">[</span><span class="token punctuation">]</span> imageData <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 punctuation">(</span><span class="token keyword">int</span><span class="token punctuation">)</span> imageFile<span class="token punctuation">.</span><span class="token function">length</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">]</span><span class="token punctuation">;</span></span> <span class="line"> fileInputStream<span class="token punctuation">.</span><span class="token function">read</span><span class="token punctuation">(</span>imageData<span class="token punctuation">)</span><span class="token punctuation">;</span></span> <span class="line"> fileInputStream<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span></span> <span class="line"></span> <span class="line"> <span class="token keyword">byte</span><span class="token punctuation">[</span><span class="token punctuation">]</span> base64ImageData <span class="token operator">=</span> <span class="token class-name">Base64</span><span class="token punctuation">.</span><span class="token function">getEncoder</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">encode</span><span class="token punctuation">(</span>imageData<span class="token punctuation">)</span><span class="token punctuation">;</span></span> <span class="line"> <span class="token class-name">String</span> base64ImageString <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span>base64ImageData<span class="token punctuation">,</span> <span class="token class-name">StandardCharsets</span><span class="token punctuation">.</span><span class="token constant">UTF_8</span><span class="token punctuation">)</span><span class="token punctuation">;</span></span> <span class="line"></span> <span class="line"> <span class="token keyword">return</span> <span class="token string">&quot;data:image/jpeg;base64,&quot;</span> <span class="token operator">+</span> base64ImageString<span class="token punctuation">;</span></span> <span class="line"></span> <span class="line"> <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span></span> <span class="line"> <span class="token comment">// 图片文件不存在的处理逻辑</span></span> <span class="line"> <span class="token keyword">return</span> <span class="token keyword">null</span><span class="token punctuation">;</span></span> <span class="line"></span> <span class="line"> <span class="token punctuation">}</span></span> <span class="line"> <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">IOException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{</span></span> <span class="line"> <span class="token keyword">throw</span> <span class="token keyword">new</span> <span class="token class-name">RuntimeException</span><span class="token punctuation">(</span>e<span class="token punctuation">)</span><span class="token punctuation">;</span></span> <span class="line"> <span class="token punctuation">}</span></span> <span class="line"> <span class="token punctuation">}</span></span> <span class="line"></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><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 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 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>`,2),c=[e];function o(l,i){return a(),s("div",null,c)}const k=n(t,[["render",o],["__file","java 代码片段.html.vue"]]),r=JSON.parse('{"path":"/Java/java%20%E4%BB%A3%E7%A0%81%E7%89%87%E6%AE%B5.html","title":"Java 代码片段","lang":"zh-CN","frontmatter":{"title":"Java 代码片段","date":"2023-5-21","tags":["Java","代码片段"],"categories":["自学篇"]},"headers":[{"level":2,"title":"图片转base64","slug":"图片转base64","link":"#图片转base64","children":[]}],"git":{"updatedTime":1727229103000,"contributors":[{"name":"袁果锅","email":"2914310412@qq.com","commits":1}]},"filePathRelative":"Java/java 代码片段.md","excerpt":"<h2>图片转base64</h2>\\n<div class=\\"language-java\\" data-highlighter=\\"prismjs\\" data-ext=\\"java\\" data-title=\\"java\\"><pre class=\\"language-java\\"><code><span class=\\"line\\">res<span class=\\"token punctuation\\">.</span><span class=\\"token function\\">setImg</span><span class=\\"token punctuation\\">(</span><span class=\\"token function\\">preview</span><span class=\\"token punctuation\\">(</span>res<span class=\\"token punctuation\\">.</span><span class=\\"token function\\">getImg</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>\\n<span class=\\"line\\"></span>\\n<span class=\\"line\\"></span>\\n<span class=\\"line\\"></span>\\n<span class=\\"line\\"><span class=\\"token keyword\\">public</span> <span class=\\"token class-name\\">String</span> <span class=\\"token function\\">preview</span><span class=\\"token punctuation\\">(</span><span class=\\"token class-name\\">String</span> name<span class=\\"token punctuation\\">)</span> <span class=\\"token punctuation\\">{</span></span>\\n<span class=\\"line\\"> <span class=\\"token keyword\\">try</span> <span class=\\"token punctuation\\">{</span></span>\\n<span class=\\"line\\"> <span class=\\"token class-name\\">String</span> imagePath <span class=\\"token operator\\">=</span> <span class=\\"token string\\">\\"D:\\\\\\\\java-upload-Pic\\\\\\\\\\"</span> <span class=\\"token operator\\">+</span> name<span class=\\"token punctuation\\">;</span></span>\\n<span class=\\"line\\"> <span class=\\"token class-name\\">File</span> imageFile <span class=\\"token operator\\">=</span> <span class=\\"token keyword\\">new</span> <span class=\\"token class-name\\">File</span><span class=\\"token punctuation\\">(</span>imagePath<span class=\\"token punctuation\\">)</span><span class=\\"token punctuation\\">;</span></span>\\n<span class=\\"line\\"></span>\\n<span class=\\"line\\"> <span class=\\"token keyword\\">if</span> <span class=\\"token punctuation\\">(</span>imageFile<span class=\\"token punctuation\\">.</span><span class=\\"token function\\">exists</span><span class=\\"token punctuation\\">(</span><span class=\\"token punctuation\\">)</span><span class=\\"token punctuation\\">)</span> <span class=\\"token punctuation\\">{</span></span>\\n<span class=\\"line\\"> <span class=\\"token class-name\\">FileInputStream</span> fileInputStream <span class=\\"token operator\\">=</span> <span class=\\"token keyword\\">new</span> <span class=\\"token class-name\\">FileInputStream</span><span class=\\"token punctuation\\">(</span>imageFile<span class=\\"token punctuation\\">)</span><span class=\\"token punctuation\\">;</span></span>\\n<span class=\\"line\\"> <span class=\\"token keyword\\">byte</span><span class=\\"token punctuation\\">[</span><span class=\\"token punctuation\\">]</span> imageData <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 punctuation\\">(</span><span class=\\"token keyword\\">int</span><span class=\\"token punctuation\\">)</span> imageFile<span class=\\"token punctuation\\">.</span><span class=\\"token function\\">length</span><span class=\\"token punctuation\\">(</span><span class=\\"token punctuation\\">)</span><span class=\\"token punctuation\\">]</span><span class=\\"token punctuation\\">;</span></span>\\n<span class=\\"line\\"> fileInputStream<span class=\\"token punctuation\\">.</span><span class=\\"token function\\">read</span><span class=\\"token punctuation\\">(</span>imageData<span class=\\"token punctuation\\">)</span><span class=\\"token punctuation\\">;</span></span>\\n<span class=\\"line\\"> fileInputStream<span class=\\"token punctuation\\">.</span><span class=\\"token function\\">close</span><span class=\\"token punctuation\\">(</span><span class=\\"token punctuation\\">)</span><span class=\\"token punctuation\\">;</span></span>\\n<span class=\\"line\\"></span>\\n<span class=\\"line\\"> <span class=\\"token keyword\\">byte</span><span class=\\"token punctuation\\">[</span><span class=\\"token punctuation\\">]</span> base64ImageData <span class=\\"token operator\\">=</span> <span class=\\"token class-name\\">Base64</span><span class=\\"token punctuation\\">.</span><span class=\\"token function\\">getEncoder</span><span class=\\"token punctuation\\">(</span><span class=\\"token punctuation\\">)</span><span class=\\"token punctuation\\">.</span><span class=\\"token function\\">encode</span><span class=\\"token punctuation\\">(</span>imageData<span class=\\"token punctuation\\">)</span><span class=\\"token punctuation\\">;</span></span>\\n<span class=\\"line\\"> <span class=\\"token class-name\\">String</span> base64ImageString <span class=\\"token operator\\">=</span> <span class=\\"token keyword\\">new</span> <span class=\\"token class-name\\">String</span><span class=\\"token punctuation\\">(</span>base64ImageData<span class=\\"token punctuation\\">,</span> <span class=\\"token class-name\\">StandardCharsets</span><span class=\\"token punctuation\\">.</span><span class=\\"token constant\\">UTF_8</span><span class=\\"token punctuation\\">)</span><span class=\\"token punctuation\\">;</span></span>\\n<span class=\\"line\\"></span>\\n<span class=\\"line\\"> <span class=\\"token keyword\\">return</span> <span class=\\"token string\\">\\"data:image/jpeg;base64,\\"</span> <span class=\\"token operator\\">+</span> base64ImageString<span class=\\"token punctuation\\">;</span></span>\\n<span class=\\"line\\"></span>\\n<span class=\\"line\\"> <span class=\\"token punctuation\\">}</span> <span class=\\"token keyword\\">else</span> <span class=\\"token punctuation\\">{</span></span>\\n<span class=\\"line\\"> <span class=\\"token comment\\">// 图片文件不存在的处理逻辑</span></span>\\n<span class=\\"line\\"> <span class=\\"token keyword\\">return</span> <span class=\\"token keyword\\">null</span><span class=\\"token punctuation\\">;</span></span>\\n<span class=\\"line\\"></span>\\n<span class=\\"line\\"> <span class=\\"token punctuation\\">}</span></span>\\n<span class=\\"line\\"> <span class=\\"token punctuation\\">}</span> <span class=\\"token keyword\\">catch</span> <span class=\\"token punctuation\\">(</span><span class=\\"token class-name\\">IOException</span> e<span class=\\"token punctuation\\">)</span> <span class=\\"token punctuation\\">{</span></span>\\n<span class=\\"line\\"> <span class=\\"token keyword\\">throw</span> <span class=\\"token keyword\\">new</span> <span class=\\"token class-name\\">RuntimeException</span><span class=\\"token punctuation\\">(</span>e<span class=\\"token punctuation\\">)</span><span class=\\"token punctuation\\">;</span></span>\\n<span class=\\"line\\"> <span class=\\"token punctuation\\">}</span></span>\\n<span class=\\"line\\"> <span class=\\"token punctuation\\">}</span></span>\\n<span class=\\"line\\"></span></code></pre></div>"}');export{k as comp,r as data};