【转】javaUDP套接字通信

• Z时代
• 2024-01-10
• 分类：综合

Java UDP网络编程 - 最简单示例

转自 http://blog.csdn.net/wintys/article/details/3525643

1. /**
2. *UDPServer
3. *@author Winty wintys@gmail.com
4. *@version 2008-12-15
5. */
6. import java.io.*;
7. import java.net.*;
9. class UDPServer{
10. publicstaticvoid main(String[] args)throws IOException{
11. DatagramSocket server = new DatagramSocket(5050);
13. byte[] recvBuf = newbyte[100];
14. DatagramPacket recvPacket
15. = new DatagramPacket(recvBuf , recvBuf.length);
17. server.receive(recvPacket);
19. String recvStr = new String(recvPacket.getData() , 0 , recvPacket.getLength());
20. System.out.println("Hello World!" + recvStr);
22. int port = recvPacket.getPort();
23. InetAddress addr = recvPacket.getAddress();
24. String sendStr = "Hello ! I'm Server";
25. byte[] sendBuf;
26. sendBuf = sendStr.getBytes();
27. DatagramPacket sendPacket
28. = new DatagramPacket(sendBuf , sendBuf.length , addr , port );
30. server.send(sendPacket);
32. server.close();
33. }
34. }

1. /**
2. *UDPClient
3. *@author Winty wintys@gmail.com
4. *@version 2008-12-15
5. */
6. import java.io.*;
7. import java.net.*;
9. class UDPClient{
10. publicstaticvoid main(String[] args)throws IOException{
11. DatagramSocket client = new DatagramSocket();
13. String sendStr = "Hello! I'm Client";
14. byte[] sendBuf;
15. sendBuf = sendStr.getBytes();
16. InetAddress addr = InetAddress.getByName("127.0.0.1");
17. int port = 5050;
18. DatagramPacket sendPacket
19. = new DatagramPacket(sendBuf ,sendBuf.length , addr , port);
21. client.send(sendPacket);
23. byte[] recvBuf = newbyte[100];
24. DatagramPacket recvPacket
25. = new DatagramPacket(recvBuf , recvBuf.length);
26. client.receive(recvPacket);
27. String recvStr = new String(recvPacket.getData() , 0 ,recvPacket.getLength());
28. System.out.println("收到:" + recvStr);
30. client.close();
31. }
32. }

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