如何更新连接到我的JTable的数据库(JavaDatabase)中的一行条目？

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

public class JTableDatabaseUpdateExample {
    public static void main(String[] args) {
        // 获取选定的行索引
        int selectedRowIndex = jTable.getSelectedRow();
        
        // 获取选定行的数据
        Object[] rowData = new Object[jTable.getColumnCount()];
        for (int i = 0; i < jTable.getColumnCount(); i++) {
            rowData[i] = jTable.getValueAt(selectedRowIndex, i);
        }
        
        // 打开数据库连接
        Connection connection = null;
        Statement statement = null;
        try {
            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydatabase", "username", "password");
            statement = connection.createStatement();
            
            // 创建更新语句
            String updateQuery = "UPDATE mytable SET column1 = '" + rowData[0] + "', column2 = '" + rowData[1] + "' WHERE id = " + rowData[2];
            
            // 执行更新语句
            int rowsAffected = statement.executeUpdate(updateQuery);
            
            if (rowsAffected > 0) {
                System.out.println("行条目更新成功！");
            } else {
                System.out.println("行条目更新失败！");
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭数据库连接
            try {
                if (statement != null) {
                    statement.close();
                }
                if (connection != null) {
                    connection.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}