Java UDP网络编程 - 最简单示例

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

 
      /**
  *UDPServer
  *@author Winty wintys@gmail.com
  *@version 2008-12-15
  */
 import java.io.*;
 import java.net.*;
 
 class UDPServer{
 publicstaticvoid main(String[] args)throws IOException{
  DatagramSocket server = new DatagramSocket(5050);
 
 byte[] recvBuf = newbyte[100];
  DatagramPacket recvPacket 
  = new DatagramPacket(recvBuf , recvBuf.length);
 
  server.receive(recvPacket);
 
  String recvStr = new String(recvPacket.getData() , 0 , recvPacket.getLength());
  System.out.println("Hello World!" + recvStr);
 
 int port = recvPacket.getPort();
  InetAddress addr = recvPacket.getAddress();
  String sendStr = "Hello ! I'm Server";
 byte[] sendBuf;
  sendBuf = sendStr.getBytes();
  DatagramPacket sendPacket 
  = new DatagramPacket(sendBuf , sendBuf.length , addr , port );
 
  server.send(sendPacket);
 
  server.close();
  }
 }
 

/**
*UDPClient
*@author Winty wintys@gmail.com
*@version 2008-12-15
*/
import java.io.*;
import java.net.*;
class UDPClient{
publicstaticvoid main(String[] args)throws IOException{
DatagramSocket client = new DatagramSocket();
String sendStr = "Hello! I'm Client";
byte[] sendBuf;
sendBuf = sendStr.getBytes();
InetAddress addr = InetAddress.getByName("127.0.0.1");
int port = 5050;
DatagramPacket sendPacket
= new DatagramPacket(sendBuf ,sendBuf.length , addr , port);
client.send(sendPacket);
byte[] recvBuf = newbyte[100];
DatagramPacket recvPacket
= new DatagramPacket(recvBuf , recvBuf.length);
client.receive(recvPacket);
String recvStr = new String(recvPacket.getData() , 0 ,recvPacket.getLength());
System.out.println("收到:" + recvStr);
client.close();
}
}

来源：oschina

链接：https://my.oschina.net/u/4399176/blog/4143685

标签

java

.Net Framework

【转】javaUDP套接字通信

Java UDP网络编程 - 最简单示例