feat: expand struts demo lab
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Codex
@@ -1,87 +1,117 @@
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<%@ page contentType="text/html;charset=UTF-8" language="java" %>
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<%@ taglib prefix="s" uri="/struts-tags" %>
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<!DOCTYPE html>
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<html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>文件上传 - Struts2 Demo</title>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Upload Demo - Struts2 Demo Lab</title>
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<style>
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body {
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font-family: 'Segoe UI', sans-serif;
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background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
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body {
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margin: 0;
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min-height: 100vh;
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padding: 20px;
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padding: 24px;
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font-family: "Aptos", "Segoe UI", "Microsoft YaHei", sans-serif;
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background: linear-gradient(135deg, #0ea5e9 0%, #38bdf8 55%, #dff4ff 100%);
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}
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.container { max-width: 600px; margin: 0 auto; }
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.card {
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background: white;
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padding: 30px;
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border-radius: 15px;
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box-shadow: 0 15px 50px rgba(0,0,0,0.3);
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.shell {
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max-width: 860px;
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margin: 0 auto;
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background: rgba(255,255,255,0.95);
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border-radius: 28px;
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padding: 28px;
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box-shadow: 0 24px 60px rgba(0,0,0,0.18);
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}
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h2 { color: #4facfe; margin-bottom: 20px; }
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.info {
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background: #fff3e0;
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padding: 15px;
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border-radius: 8px;
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margin-bottom: 20px;
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border-left: 4px solid #ff9800;
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.eyebrow {
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font-size: 12px;
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letter-spacing: 0.12em;
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text-transform: uppercase;
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color: #0284c7;
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font-weight: 800;
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}
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.form-group { margin-bottom: 20px; }
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label { display: block; margin-bottom: 8px; color: #555; font-weight: 500; }
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input[type="file"] {
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width: 100%;
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padding: 12px;
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border: 2px dashed #4facfe;
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border-radius: 8px;
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background: #f0f9ff;
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h1 { margin: 10px 0 12px; }
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p { margin: 0; color: #54687c; line-height: 1.85; }
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.note {
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margin-top: 16px;
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padding: 16px;
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border-radius: 18px;
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background: #eef8ff;
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border: 1px solid #d6e9f7;
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}
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.field { margin-top: 16px; }
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label { display: block; margin-bottom: 8px; font-weight: 700; color: #173652; }
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input[type="file"] {
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width: 100%;
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padding: 16px;
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border-radius: 16px;
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border: 1px dashed #5ab8f0;
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background: #f8fcff;
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}
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button {
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width: 100%;
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margin-top: 18px;
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padding: 14px;
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background: #4facfe;
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border: 0;
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border-radius: 14px;
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background: linear-gradient(135deg, #0284c7, #38bdf8);
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color: white;
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border: none;
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border-radius: 8px;
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font-size: 16px;
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font-weight: 800;
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cursor: pointer;
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}
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button:hover { background: #00c6fb; }
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.action-error {
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margin-top: 16px;
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padding: 14px;
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border-radius: 14px;
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background: #fff1f1;
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color: #b63a3a;
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border: 1px solid #f1c4c4;
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}
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.links { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
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.link-btn {
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display: inline-flex;
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padding: 10px 14px;
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border-radius: 999px;
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background: #edf7ff;
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color: #0284c7;
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text-decoration: none;
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font-weight: 700;
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}
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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="card">
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<h2>📁 文件上传</h2>
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<div class="info">
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<strong>Struts2 文件上传原理：</strong>
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<ul style="margin:10px 0 0 20px;">
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<li>使用 <code>File</code> 类型接收文件</li>
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<li>使用 <code>String fileName</code> 获取原始文件名</li>
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<li>使用 <code>String contentType</code> 获取文件类型</li>
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<li>底层使用 commons-fileupload</li>
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</ul>
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<div class="shell">
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<div class="eyebrow">Upload demo</div>
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<h1>Capture file metadata without writing anything to disk</h1>
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<p>This safer upload sample focuses on how Struts binds multipart form fields. The action records metadata only, which makes the demo easier to run in constrained environments.</p>
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<div class="note">
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<strong>What the action collects</strong>
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<p style="margin-top: 8px;">Primary filename, content type, and total selected file count.</p>
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</div>
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<s:if test="hasActionErrors()">
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<div class="action-error"><s:actionerror/></div>
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</s:if>
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<s:form action="upload" method="post" enctype="multipart/form-data" namespace="/">
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<div class="field">
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<label>Primary file</label>
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<s:file name="upload"/>
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</div>
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<s:form action="upload" method="post" enctype="multipart/form-data">
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<div class="form-group">
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<label>选择文件</label>
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<s:file name="upload"/>
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</div>
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<div class="form-group">
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<label>选择文件 (多文件)</label>
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<s:file name="uploads" multiple="multiple"/>
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</div>
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<button type="submit">上传文件</button>
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</s:form>
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<p style="text-align:center;margin-top:20px;">
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<a href="../index.jsp">← 返回首页</a>
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</p>
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<div class="field">
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<label>Extra files</label>
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<s:file name="uploads" multiple="multiple"/>
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</div>
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<button type="submit">Submit upload metadata</button>
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</s:form>
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<div class="links">
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<a class="link-btn" href="../index.jsp">Back to portal</a>
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<a class="link-btn" href="../demo/upload/index.jsp">Open upload guide</a>
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</div>
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</div>
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</body>
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</html>
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</html>
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