1 package com;
2
3 import java.io.IOException;
4 import java.net.*;
5
6 /**
7 * UDP Client
8 *
9 * Created by Administrator on 2018/5/3.
10 */
11 public class Client {
12
13 public static void main(String[] args) throws IOException {
14
15 /**
16 * send message
17 */
18 InetAddress inetAddress = InetAddress.getByName("localhost");
19 byte[] data = "name:tom, pwd:123".getBytes();
20 DatagramPacket datagramPacket = new DatagramPacket(data, data.length, inetAddress, 8800);
21 DatagramSocket datagramSocket = new DatagramSocket();
22 datagramSocket.send(datagramPacket);
23
24 /**
25 * receive message
26 */
27 byte[] data2 = new byte[1024];
28 DatagramPacket datagramPacket1 = new DatagramPacket(data2, data2.length);
29 datagramSocket.receive(datagramPacket1);
30 String info = new String(data2, 0, data2.length);
31 System.out.println("I am Client, Server say:" + info);
32
33 /**
34 * close resource
35 */
36 datagramSocket.close();
37 }
38 }
1 package com;
2
3 import java.io.IOException;
4 import java.net.DatagramPacket;
5 import java.net.DatagramSocket;
6 import java.net.InetAddress;
7
8 /**
9 * UDP Server
10 *
11 * Created by Administrator on 2018/5/3.
12 */
13 public class Server {
14
15 public static void main(String[] args) throws IOException {
16
17 DatagramSocket datagramSocket = new DatagramSocket(8800);
18
19 /**
20 * receive message
21 */
22 byte[] bytes = new byte[1024];
23 DatagramPacket datagramPacket = new DatagramPacket(bytes, bytes.length);
24 datagramSocket.receive(datagramPacket);
25 String info = new String(bytes, 0, datagramPacket.getLength());
26 System.out.println("I am Server, Client say: " + info);
27
28 /**
29 * send message
30 */
31 InetAddress inetAddress = datagramPacket.getAddress();
32 int port = datagramPacket.getPort();
33 byte[] data = "welcome!".getBytes();
34 DatagramPacket datagramPacket1 = new DatagramPacket(data, data.length, inetAddress, port);
35 datagramSocket.send(datagramPacket1);
36
37 /**
38 * close resource
39 */
40 datagramSocket.close();
41 }
42 }
