Java编程实现基于UDP的ping命令的类似功能，包括服务器端pingServer功能、客户端pingClient功能

以下是基于UDP实现ping命令的Java代码，包括服务器端pingServer功能和客户端pingClient功能。

pingServer代码如下：

import java.net.*;

public class PingServer {
    private static final int PORT = 12345;

    public static void main(String[] args) throws Exception {
        DatagramSocket serverSocket = new DatagramSocket(PORT);

        byte[] receiveData = new byte[1024];
        byte[] sendData = new byte[1024];

        while (true) {
            DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
            serverSocket.receive(receivePacket);

            InetAddress clientAddress = receivePacket.getAddress();
            int clientPort = receivePacket.getPort();

            String message = new String(receivePacket.getData(), 0, receivePacket.getLength());
            System.out.println("Received message: " + message);

            String response = "Pong";
            sendData = response.getBytes();

            DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, clientAddress, clientPort);
            serverSocket.send(sendPacket);
        }
    }
}

pingClient代码如下：

import java.net.*;

public class PingClient {
    private static final int PORT = 12345;

    public static void main(String[] args) throws Exception {
        DatagramSocket clientSocket = new DatagramSocket();

        byte[] sendData = new byte[1024];
        byte[] receiveData = new byte[1024];

        InetAddress serverAddress = InetAddress.getByName("localhost");

        for (int i = 0; i < 10; i++) {
            String message = "Ping";
            sendData = message.getBytes();

            DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, serverAddress, PORT);
            clientSocket.send(sendPacket);

            DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
            clientSocket.receive(receivePacket);

            String response = new String(receivePacket.getData(), 0, receivePacket.getLength());
            System.out.println("Received response: " + response);

            Thread.sleep(1000);
        }

        clientSocket.close();
    }
}

运行pingServer和pingClient，可以看到客户端发送了10个Ping消息，服务器端收到后返回Pong消息。