咨询-2022-12-20

咨询

发送方

package Chat;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.net.SocketException;

public class UdpSendDemo01 {
    public static void main(String[] args) throws Exception {
        DatagramSocket socket = new DatagramSocket(8888);

        //准备数据，控制台读取数据 system.in
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        while (true) {
            String data = reader.readLine();
            byte[] datas = data.getBytes();
            DatagramPacket packet = new DatagramPacket(datas, 0, datas.length, new InetSocketAddress("localhost", 6666));
            socket.send(packet);
            if (data.equals("bye")){
                break;
            }
        }
        socket.close();

    }

}

接收方

package Chat;


import java.net.DatagramPacket;
import java.net.DatagramSocket;

public class UdpReceiverDemo01 {
    public static void main(String[] args) throws Exception {

        DatagramSocket socket = new DatagramSocket(6666);
        while (true){
            byte[] container = new byte[10];
            DatagramPacket packet = new DatagramPacket(container,0,container.length);
            socket.receive(packet);

            byte[] data =packet.getData();
            String receivedata = new String(data, 0, data.length);
            System.out.println(receivedata);

            if (receivedata.equals("bye")){
                break;
            }
        }
            socket.close();
    }
}