jsp注册登陆页面代码

JSP（JavaServer Pages）是一种用于创建动态Web内容的技术，它允许开发者将Java代码嵌入到HTML页面中，从而实现动态内容的生成和交互。下面是一个简单的JSP注册和登录页面的代码示例。

注册页面 (register.jsp)

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>注册页面</title>
</head>
<body>
    <h2>用户注册</h2>
    <form action="registerProcess.jsp" method="post">
        用户名: <input type="text" name="username"><br><br>
        密码: <input type="password" name="password"><br><br>
        <input type="submit" value="注册">
    </form>
</body>
</html>

登录页面 (login.jsp)

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>登录页面</title>
</head>
<body>
    <h2>用户登录</h2>
    <form action="loginProcess.jsp" method="post">
        用户名: <input type="text" name="username"><br><br>
        密码: <input type="password" name="password"><br><br>
        <input type="submit" value="登录">
    </form>
</body>
</html>

注册处理页面 (registerProcess.jsp)

<%@ page import="java.sql.*" %>
<%
    String username = request.getParameter("username");
    String password = request.getParameter("password");

    // 连接数据库
    Connection conn = null;
    PreparedStatement pstmt = null;
    try {
        Class.forName("com.mysql.jdbc.Driver");
        conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "password");
        String sql = "INSERT INTO users (username, password) VALUES (?, ?)";
        pstmt = conn.prepareStatement(sql);
        pstmt.setString(1, username);
        pstmt.setString(2, password);
        pstmt.executeUpdate();
        out.println("注册成功！");
    } catch (Exception e) {
        out.println("注册失败：" + e.getMessage());
    } finally {
        if (pstmt != null) pstmt.close();
        if (conn != null) conn.close();
    }
%>

登录处理页面 (loginProcess.jsp)

<%@ page import="java.sql.*" %>
<%
    String username = request.getParameter("username");
    String password = request.getParameter("password");

    // 连接数据库
    Connection conn = null;
    PreparedStatement pstmt = null;
    ResultSet rs = null;
    try {
        Class.forName("com.mysql.jdbc.Driver");
        conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "password");
        String sql = "SELECT * FROM users WHERE username=? AND password=?";
        pstmt = conn.prepareStatement(sql);
        pstmt.setString(1, username);
        pstmt.setString(2, password);
        rs = pstmt.executeQuery();
        if (rs.next()) {
            out.println("登录成功！");
        } else {
            out.println("登录失败，用户名或密码错误！");
        }
    } catch (Exception e) {
        out.println("登录失败：" + e.getMessage());
    } finally {
        if (rs != null) rs.close();
        if (pstmt != null) pstmt.close();
        if (conn != null) conn.close();
    }
%>