UDP聊天实现

发送端：

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

        //准备数据：控制台读取 System.in
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        while (true){
            String s = br.readLine();
            byte[] datas = s.getBytes();
            DatagramPacket packet = new DatagramPacket(datas, 0, datas.length, new InetSocketAddress("localhost", 6666));

            socket.send(packet);

            if (s.equals("bye")){
                break;
            }
        }


        socket.close();

    }
}

接收端：

public class UdpReceiveDemo01 {
    public static void main(String[] args) throws Exception {
        DatagramSocket socket = new DatagramSocket(6666);

        while (true){
            byte[] container = new byte[1024];
            DatagramPacket packet = new DatagramPacket(container, 0, container.length);
            socket.receive(packet);

            byte[] data = packet.getData();
            String receiveData = new String(data, 0, packet.getLength());

            System.out.println(receiveData);

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

        }
        socket.close();

    }
}