UDP 服务端发送

import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.util.Date;

public class UdpServerSocket {

    public static void main(String[] args) throws Exception {
        while (true) {
            DatagramSocket ds = new DatagramSocket();
            String str = new Date().toString();
            DatagramPacket dp = new DatagramPacket(str.getBytes(), str.length(),
                    InetAddress.getByName("255.255.255.255"), 514);
            ds.send(dp);
            ds.close();
        }
    }
}

255.255.255.255，为广播，也可以写固定IP