UDP实现聊天

UDP实现聊天

发送端

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

public class UdpSenderDemo01 {
    public static void main(String[] args) throws IOException {
        DatagramSocket socket=new DatagramSocket(8888);

        //准备数据：控制台读取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();
    }
}

接收端

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.net.SocketException;

public class UdpReceiveDemo01 {
    public static void main(String[] args) throws IOException {
        DatagramSocket socket=new DatagramSocket(6666);
        while(true){
            //准备接收包裹
            byte[] container=new byte[1024];
            DatagramPacket packet=new DatagramPacket(container,0,container.length);
            socket.receive(packet);//阻塞接收包裹

            //断开连接  bye
            byte[] data=packet.getData();
            String receiveData=new String(data,0,data.length);

            System.out.println(receiveData);
            if(receiveData.equals("bye")){
                break;
            }

        }

        socket.close();
    }
}