使用多播在Java中进行网络发现

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.InetAddress;
import java.net.MulticastSocket;

public class MulticastDiscovery {
    public static void main(String[] args) {
        try {
            InetAddress group = InetAddress.getByName("224.0.0.1"); // 多播组地址
            int port = 8888; // 多播组端口

            MulticastSocket socket = new MulticastSocket(port);
            socket.joinGroup(group); // 加入多播组

            byte[] buffer = new byte[1024];
            DatagramPacket packet = new DatagramPacket(buffer, buffer.length);

            // 接收多播数据包
            socket.receive(packet);

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

            socket.leaveGroup(group); // 离开多播组
            socket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}