jsp往mysql添加数据库

CREATE DATABASE user_db;
USE user_db;

CREATE TABLE users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) NOT NULL,
    password VARCHAR(50) NOT NULL
);

<%@ page import="java.sql.*" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Register</title>
</head>
<body>
    <h1>Register</h1>
    <form action="register_process.jsp" method="post">
        Username: <input type="text" name="username"><br>
        Password: <input type="password" name="password"><br>
        <input type="submit" value="Register">
    </form>
</body>
</html>

<%@ page import="java.sql.*" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Registration Result</title>
</head>
<body>
<%
    String username = request.getParameter("username");
    String password = request.getParameter("password");

    // 数据库连接信息
    String url = "jdbc:mysql://localhost:3306/user_db";
    String dbUser = "root";
    String dbPassword = "password";

    try {
        // 加载JDBC驱动
        Class.forName("com.mysql.cj.jdbc.Driver");

        // 建立数据库连接
        Connection conn = DriverManager.getConnection(url, dbUser, dbPassword);

        // 插入数据
        String sql = "INSERT INTO users (username, password) VALUES (?, ?)";
        PreparedStatement pstmt = conn.prepareStatement(sql);
        pstmt.setString(1, username);
        pstmt.setString(2, password);
        pstmt.executeUpdate();

        out.println("Registration successful!");
    } catch (ClassNotFoundException | SQLException e) {
        out.println("Error: " + e.getMessage());
    } finally {
        // 关闭连接
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
%>
</body>
</html>