如何从netbeans向数据库中插入数据？

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class InsertDataExample {
    public static void main(String[] args) {
        // 数据库连接信息
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String username = "root";
        String password = "password";

        // SQL插入语句
        String sql = "INSERT INTO mytable (column1, column2) VALUES (?, ?)";

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

            // 创建PreparedStatement对象
            PreparedStatement pstmt = conn.prepareStatement(sql);

            // 设置插入参数的值
            pstmt.setString(1, "value1");
            pstmt.setString(2, "value2");

            // 执行插入操作
            int rowsAffected = pstmt.executeUpdate();
            System.out.println(rowsAffected + " row(s) affected.");

            // 关闭PreparedStatement和数据库连接
            pstmt.close();
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}