如何从jdbc连接中识别客户端ip端口

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.util.logging.Logger;

public class JdbcClientInfoExample {
    public static void main(String[] args) {
        Connection connection = null;
        try {
            // 加载数据库驱动
            Class.forName("com.mysql.jdbc.Driver");
            
            // 获取数据库连接
            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydatabase", "username", "password");
            
            // 获取底层网络连接
            java.sql.Connection physicalConnection = connection.unwrap(java.sql.Connection.class);
            
            // 获取客户端IP地址和端口号
            String clientIP = physicalConnection.getClientInfo("HOSTNAME");
            int clientPort = Integer.parseInt(physicalConnection.getClientInfo("PORT"));
            
            // 输出客户端IP地址和端口号
            System.out.println("Client IP: " + clientIP);
            System.out.println("Client Port: " + clientPort);
            
            // 其他操作...
            
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭数据库连接
            if (connection != null) {
                try {
                    connection.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}