studentManageSystem_JSP/web/login.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>学生管理系统 - 登录</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            background-color: #f5f5f5;
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
        }
        .login-container {
            background-color: white;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            width: 300px;
        }
        .login-container h2 {
            text-align: center;
            color: #333;
            margin-bottom: 30px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 5px;
            color: #666;
        }
        .form-group input {
            width: 100%;
            padding: 8px;
            border: 1px solid #ddd;
            border-radius: 4px;
            box-sizing: border-box;
        }
        .btn {
            width: 100%;
            padding: 10px;
            background-color: #007bff;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }
        .btn:hover {
            background-color: #0056b3;
        }
        .error {
            color: red;
            text-align: center;
            margin-bottom: 15px;
        }
    </style>
</head>
<body>
    <div class="login-container">
        <h2>学生管理系统</h2>
        
        <% if (request.getParameter("error") != null) { %>
            <div class="error">用户名或密码错误！</div>
        <% } %>
        
        <form action="${pageContext.request.contextPath}/login" method="post">
            <div class="form-group">
                <label for="username">用户名：</label>
                <input type="text" id="username" name="username" required>
            </div>
            <div class="form-group">
                <label for="password">密码：</label>
                <input type="password" id="password" name="password" required>
            </div>
            <button type="submit" class="btn">登录</button>
        </form>
        
        <!-- 简单演示用，实际项目中应该使用数据库验证 -->
        <script>
            // 演示用，实际应该在后端验证
            document.querySelector('form').addEventListener('submit', function(e) {
                const username = document.getElementById('username').value;
                const password = document.getElementById('password').value;
                
                // 简单验证（演示用，实际应该在后端验证）
                if (username === 'admin' && password === 'admin123') {
                    // 登录成功
                } else {
                    e.preventDefault();
                    alert('用户名或密码错误！请使用 admin/admin123');
                }
            });
        </script>
    </div>
</body>
</html>