网络编程之UDP

 1 package myInetaddress;
 2 import java.net.DatagramPacket;
 3 import java.net.DatagramSocket;
 4 import java.net.InetAddress;
 5 import java.net.SocketException;
 6 
 7 import org.junit.Test;
 8 public class MyInetAddress8 {
 9     @Test public void server() throws Exception{
10         //1.创建套接字
11         DatagramSocket server = new DatagramSocket(8878);
12         //定义数据包，用来接收发送的数据包
13         byte[] b = new byte[1024];
14         DatagramPacket dp = new DatagramPacket(b,b.length);
15         //3.接收数据包
16         server.receive(dp);
17         //拆包
18         String str = new String(dp.getData(),0,dp.getLength());
19         System.out.println(str);
20         server.close();
21     }
22     @Test
23     public void client() throws Exception{
24         //1
25         DatagramSocket d = new DatagramSocket();
26         //2
27         byte[] b = "地哦啊你好的".getBytes();
28         DatagramPacket dp = new DatagramPacket(b,b.length,InetAddress.getByName("192.168.11.229"),8878);
29         //3
30         d.send(dp);
31         d.close();
32     }
33     
34 }