UDP学习3(通过键盘录入方式发送数据)

 1 import java.net.*;

 2 import java.io.*;

 3 class UDPSDemo

 4 {

 5     public static void main(String[]args) throws Exception

 6     {

 7         //创建发送端socket服务

 8         DatagramSocket ds=new DatagramSocket();

 9         //准备发送的数据包

10         BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

11         String line;

12         while((line=br.readLine())!=null)

13         {

14             if("886".equals(line))

15                 break;

16             byte[] buf=line.getBytes();

17             //数据包

18             DatagramPacket dp=new DatagramPacket(buf,buf.length,InetAddress.getByName("localhost"),10000);

19             //发送

20             ds.send(dp);

21         }

22         ds.close();

23     }

24 }

25 

26 class UDPRDemo

27 {

28     public static void main(String[]args) throws Exception

29     {

30         //创建接收端socket服务,明确监听端口号

31         DatagramSocket ds=new DatagramSocket(10000);

32         while(true)

33         {

34             //准备接收数据的数据包

35             byte[] buf=new byte[1024];

36             DatagramPacket dp=new DatagramPacket(buf,buf.length);

37                         //接收

38             ds.receive(dp);

39             String address=dp.getAddress().getHostAddress();

40             String data=new String(dp.getData(),0,dp.getLength());

41             System.out.println("IP:"+address);

42             System.out.println("Data:"+data);

43         }

44     }

45 }    

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