102 lines
5.9 KiB
Plaintext
102 lines
5.9 KiB
Plaintext
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
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<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8">
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<title>文件上传 - Struts2 学习</title>
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<style>
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body { font-family: 'Segoe UI', sans-serif; background: linear-gradient(135deg, #667eea, #764ba2); min-height: 100vh; margin: 0; padding: 20px; }
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.container { max-width: 1200px; margin: 0 auto; }
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.breadcrumb { background: white; padding: 15px 25px; border-radius: 10px; margin-bottom: 20px; }
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.content { background: white; border-radius: 20px; padding: 40px; }
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h1 { color: #667eea; border-bottom: 3px solid #667eea; padding-bottom: 15px; }
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h2 { color: #764ba2; margin-top: 30px; }
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.section { margin: 25px 0; padding: 20px; background: #f8f9fa; border-radius: 10px; }
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pre { background: #1e1e1e; color: #d4d4d4; padding: 20px; border-radius: 10px; overflow-x: auto; }
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.keyword { color: #569cd6; }
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.string { color: #ce9178; }
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.comment { color: #6a9955; }
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.btn { display: inline-block; padding: 12px 30px; background: #667eea; color: white; text-decoration: none; border-radius: 25px; }
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</style>
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</head>
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<body>
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<div class="container">
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<div class="breadcrumb">
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<a href="/">🏠 首页</a> / 文件上传
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</div>
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<div class="content">
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<h1>📁 文件上传</h1>
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<h2>1. 单文件上传</h2>
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<div class="section">
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<pre><span class="comment">// Action</span>
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<span class="keyword">public class</span> UploadAction <span class="keyword">extends</span> ActionSupport {
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<span class="comment">// 文件对象</span>
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<span class="keyword">private</span> File upload;
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<span class="comment">// 文件名 (格式: 属性名FileName)</span>
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<span class="keyword">private</span> String uploadFileName;
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<span class="comment">// 文件类型 (格式: 属性名ContentType)</span>
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<span class="keyword">private</span> String uploadContentType;
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<span class="annotation">@Override</span>
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<span class="keyword">public</span> String execute() <span class="keyword">throws</span> Exception {
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<span class="comment">// 保存文件</span>
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String path = ServletActionContext.getServletContext()
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.getRealPath(<span class="string">"/upload"</span>);
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<span class="keyword">new</span> File(path, uploadFileName).createNewFile();
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<span class="comment">// 复制文件</span>
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FileUtils.copyFile(upload, <span class="keyword">new</span> File(path, uploadFileName));
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<span class="keyword">return</span> SUCCESS;
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}
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<span class="comment">// getter/setter</span>
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<span class="keyword">public</span> File getUpload() { <span class="keyword">return</span> upload; }
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<span class="keyword">public void</span> setUpload(File upload) { <span class="keyword">this</span>.upload = upload; }
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<span class="keyword">public</span> String getUploadFileName() { <span class="keyword">return</span> uploadFileName; }
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<span class="keyword">public void</span> setUploadFileName(String uploadFileName) { <span class="keyword">this</span>.uploadFileName = uploadFileName; }
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<span class="keyword">public</span> String getUploadContentType() { <span class="keyword">return</span> uploadContentType; }
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<span class="keyword">public void</span> setUploadContentType(String uploadContentType) { <span class="keyword">this</span>.uploadContentType = uploadContentType; }
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}</pre>
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</div>
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<h2>2. JSP 表单</h2>
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<div class="section">
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<pre><span class="comment"><%@ taglib prefix="s" uri="/struts-tags" %></span>
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<span class="keyword"><s:form</span> action=<span class="string">"upload"</span> method=<span class="string">"post"</span> enctype=<span class="string">"multipart/form-data"</span><span class="keyword">></span>
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<span class="keyword"><s:file</span> name=<span class="string">"upload"</span> label=<span class="string">"选择文件"</span>/>
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<span class="keyword"><s:submit</span> value=<span class="string">"上传"</span>/>
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<span class="keyword"></s:form></span></pre>
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</div>
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<h2>3. 多文件上传</h2>
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<div class="section">
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<pre><span class="comment">// 使用 List 接收多文件</span>
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<span class="keyword">private</span> List<File> uploads;
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<span class="keyword">private</span> List<String> uploadsFileName;
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<span class="comment">// 表单</span>
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<span class="keyword"><s:file</span> name=<span class="string">"uploads"</span> multiple=<span class="string">"multiple"</span>/></pre>
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</div>
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<h2>4. 限制文件大小和类型</h2>
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<div class="section">
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<pre><span class="comment">// struts.xml 配置</span>
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<span class="keyword"><action</span> name=<span class="string">"upload"</span> class=<span class="string">"com.demo.UploadAction"</span><span class="keyword">></span>
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<span class="keyword"><interceptor-ref</span> name=<span class="string">"fileUpload"</span><span class="keyword">></span>
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<span class="keyword"><param</span> name=<span class="string">"maximumSize"</span><span class="keyword">></span>10485760<span class="keyword"></param></span><span class="comment"><!-- 10MB --></span>
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<span class="keyword"><param</span> name=<span class="string">"allowedTypes"</span><span class="keyword">></span>image/png,image/jpeg<span class="keyword"></param></span>
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<span class="keyword"></interceptor-ref></span>
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<span class="keyword"><result></span>/upload/success.jsp<span class="keyword"></result></span>
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<span class="keyword"></action></span></pre>
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</div>
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<a href="/demo/ajax" class="btn">下一节：AJAX →</a>
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</div>
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</div>
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</body>
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</html> |