Javaでデータベースを使用してフォームデータを保存するにはどうすればよいですか?

CREATE DATABASE form_data;
USE form_data;
CREATE TABLE form_table (
   id INT PRIMARY KEY AUTO_INCREMENT,
   name VARCHAR(50),
   age INT,
   email VARCHAR(50)
);

import java.sql.*;

Connection conn = null;
PreparedStatement stmt = null;

try {
    String url = "jdbc:mysql://localhost/form_data";
    String username = "root";
    String password = "123456";

    //加载数据库驱动程序
    Class.forName("com.mysql.cj.jdbc.Driver");

    //建立数据库连接
    conn = DriverManager.getConnection(url, username, password);

    //执行数据库操作
    //...
} catch (Exception e) {
    e.printStackTrace();
} finally {
    //关闭数据库连接
    try {
        if (stmt != null) stmt.close();
        if (conn != null) conn.close();
    } catch (SQLException e) {
        e.printStackTrace();
    }
}

try {
    //建立数据库连接
    //...

    //准备SQL插入语句
    String sql = "INSERT INTO form_table (name, age, email) VALUES (?, ?, ?)";
    stmt = conn.prepareStatement(sql);

    //设置参数
    stmt.setString(1, "张三");
    stmt.setInt(2, 20);
    stmt.setString(3, "zhangsan@example.com");

    //执行插入操作
    stmt.executeUpdate();

    System.out.println("数据插入成功！");
} catch (SQLException e) {
    e.printStackTrace();
}

try {
    //建立数据库连接
    //...

    //准备SQL查询语句
    String sql = "SELECT * FROM form_table";
    stmt = conn.prepareStatement(sql);

    //执行查询操作
    ResultSet rs = stmt.executeQuery();

    //遍历查询结果
    while (rs.next()) {
        int id = rs.getInt("id");
        String name = rs.getString("name");
        int age = rs.getInt("age");
        String email = rs.getString("email");

        System.out.println("id: " + id + ", name: " + name + ", age: " + age + ", email: " + email);
    }

    rs.close();
} catch (SQLException e) {
    e.printStackTrace();
}