175 lines
8.8 KiB
HTML
175 lines
8.8 KiB
HTML
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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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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>IoC 容器学习 - Spring Boot</title>
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<style>
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* { margin: 0; padding: 0; box-sizing: border-box; }
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body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: #f5f5f5; }
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.container { max-width: 1400px; margin: 0 auto; padding: 20px; }
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.header { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; padding: 30px 20px; text-align: center; margin-bottom: 20px; border-radius: 10px; }
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.header h1 { font-size: 2em; }
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.nav { display: flex; gap: 10px; margin-bottom: 20px; flex-wrap: wrap; justify-content: center; }
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.nav a { padding: 10px 20px; background: white; border-radius: 20px; text-decoration: none; color: #333; font-size: 0.9em; }
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.nav a:hover, .nav a.active { background: #667eea; color: white; }
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.card { background: white; border-radius: 10px; padding: 20px; margin-bottom: 20px; box-shadow: 0 2px 10px rgba(0,0,0,0.08); }
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.card h3 { color: #667eea; margin-bottom: 15px; border-bottom: 2px solid #eee; padding-bottom: 10px; }
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.concept-box { background: #f8f9fa; border-left: 4px solid #667eea; padding: 15px; margin: 10px 0; border-radius: 5px; }
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.concept-box h4 { color: #333; margin-bottom: 10px; }
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.btn { padding: 10px 20px; background: #667eea; color: white; border: none; border-radius: 5px; cursor: pointer; margin: 5px; }
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.btn:hover { background: #5a6fd6; }
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.btn-secondary { background: #6c757d; }
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.result { background: #1e1e1e; color: #d4d4d4; padding: 15px; border-radius: 5px; margin-top: 10px; font-family: monospace; font-size: 0.9em; overflow-x: auto; max-height: 400px; overflow-y: auto; }
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table { width: 100%; border-collapse: collapse; margin: 10px 0; }
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th, td { padding: 10px; text-align: left; border-bottom: 1px solid #eee; }
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th { background: #f8f9fa; font-weight: 600; }
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tr:hover { background: #f8f9fa; }
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.badge { padding: 4px 8px; border-radius: 4px; font-size: 0.8em; }
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.badge-primary { background: #667eea; color: white; }
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.badge-success { background: #28a745; color: white; }
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.badge-warning { background: #ffc107; color: #333; }
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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="header">
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<h1>📦 IoC 容器学习</h1>
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<p>控制反转 (Inversion of Control) 与依赖注入 (Dependency Injection)</p>
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</div>
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<div class="nav">
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<a href="index.html">🏠 首页</a>
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<a href="ioc.html" class="active">📦 IoC</a>
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<a href="aop.html">🔪 AOP</a>
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<a href="mybatis.html">💾 MyBatis</a>
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<a href="transaction.html">🔄 事务</a>
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<a href="users.html">👥 用户</a>
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<a href="api.html">🔌 API</a>
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</div>
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<div class="card">
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<h3>📚 核心概念</h3>
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<div class="concept-box">
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<h4>什么是 IoC？</h4>
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<p><strong>控制反转 (Inversion of Control)</strong>：将对象的创建和管理交给 Spring 容器，而不是由开发者手动创建。</p>
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<p><strong>依赖注入 (Dependency Injection)</strong>：IoC 的一种实现方式，通过构造器、Setter 或字段将依赖注入到对象中。</p>
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</div>
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<div class="concept-box">
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<h4>为什么用 IoC？</h4>
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<ul>
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<li>✅ <strong>解耦</strong>：对象之间不直接依赖，通过接口交互</li>
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<li>✅ <strong>可测试</strong>：方便使用 Mock 对象进行单元测试</li>
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<li>✅ <strong>可维护</strong>：集中管理对象生命周期</li>
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<li>✅ <strong>AOP 支持</strong>：便于实现切面编程</li>
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</ul>
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</div>
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</div>
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<div class="card">
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<h3>🔍 查看所有 Bean</h3>
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<p>Spring 容器中管理的所有 Bean 对象</p>
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<button class="btn" onclick="loadBeans()">刷新 Bean 列表</button>
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<button class="btn btn-secondary" onclick="document.getElementById('beansResult').innerHTML=''">清空</button>
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<div id="beansResult" class="result"></div>
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</div>
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<div class="card">
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<h3>📊 Bean 作用域</h3>
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<table>
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<tr><th>作用域</th><th>说明</th><th>使用场景</th></tr>
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<tr><td><span class="badge badge-primary">singleton</span></td><td>默认，整个应用只有一个实例</td><td>无状态的服务、配置类</td></tr>
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<tr><td><span class="badge badge-success">prototype</span></td><td>每次请求都创建新实例</td><td>有状态的对象</td></tr>
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<tr><td><span class="badge badge-warning">request</span></td><td>每个 HTTP 请求一个实例</td><td>Web 应用</td></tr>
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<tr><td><span class="badge badge-warning">session</span></td><td>每个 HTTP 会话一个实例</td><td>用户会话数据</td></tr>
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</table>
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<button class="btn" onclick="testScopes()">测试作用域</button>
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<div id="scopesResult" class="result"></div>
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</div>
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<div class="card">
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<h3>⚡ 性能统计</h3>
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<p>实时监控方法执行时间和调用次数</p>
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<button class="btn" onclick="loadPerformance()">刷新统计</button>
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<button class="btn btn-secondary" onclick="resetPerformance()">重置统计</button>
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<div id="performanceResult" class="result"></div>
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</div>
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<div class="card">
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<h3>💉 依赖注入方式对比</h3>
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<table>
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<tr><th>方式</th><th>优点</th><th>缺点</th><th>推荐度</th></tr>
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<tr><td>构造器注入</td><td>明确依赖、不可变、易测试</td><td>参数多时代码长</td><td>⭐⭐⭐⭐⭐</td></tr>
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<tr><td>Setter 注入</td><td>可选依赖、灵活</td><td>可能为 null</td><td>⭐⭐⭐</td></tr>
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<tr><td>字段注入</td><td>代码简洁</td><td>隐藏依赖、难测试</td><td>⭐</td></tr>
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</table>
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</div>
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</div>
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<script>
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async function loadBeans() {
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const result = document.getElementById('beansResult');
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result.textContent = '加载中...';
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try {
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const res = await fetch('/api/learning/ioc/beans');
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const data = await res.json();
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result.innerHTML = `<strong>总 Bean 数: ${data.total}</strong>\n\n用户相关 Bean:\n${data.userBeans.map(b => ' - ' + b).join('\n')}`;
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} catch (e) {
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result.textContent = '加载失败: ' + e.message;
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}
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}
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async function testScopes() {
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const result = document.getElementById('scopesResult');
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try {
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const res = await fetch('/api/learning/ioc/scopes');
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const data = await res.json();
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result.innerHTML = JSON.stringify(data, null, 2);
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} catch (e) {
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result.textContent = '测试失败: ' + e.message;
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}
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}
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async function loadPerformance() {
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const result = document.getElementById('performanceResult');
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result.textContent = '加载中...';
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try {
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const res = await fetch('/api/learning/ioc/performance');
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const data = await res.json();
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if (Object.keys(data).length === 0) {
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result.textContent = '暂无性能数据，请先调用一些 API';
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return;
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}
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let html = '<table><tr><th>方法</th><th>调用次数</th><th>错误数</th><th>平均耗时(ms)</th><th>最大耗时(ms)</th></tr>';
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for (const [key, val] of Object.entries(data)) {
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html += `<tr><td>${key}</td><td>${val.count}</td><td>${val.errors}</td><td>${val.avgMs}</td><td>${val.maxMs}</td></tr>`;
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}
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html += '</table>';
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result.innerHTML = html;
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} catch (e) {
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result.textContent = '加载失败: ' + e.message;
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}
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}
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async function resetPerformance() {
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try {
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await fetch('/api/learning/ioc/performance/reset', { method: 'POST' });
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loadPerformance();
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} catch (e) {
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alert('重置失败: ' + e.message);
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}
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}
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loadBeans();
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loadPerformance();
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</script>
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</body>
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</html>
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