java socket编程——UDP通信

Client.java:

import java.net.DatagramPacket;

import java.net.DatagramSocket;

import java.net.InetAddress;

import java.util.Scanner;

public class Client {

public static void main(String[] args){

try {

DatagramSocket s=new DatagramSocket(9001);

Boolean flag=true;

while(flag){

String str=InetAddress.getLocalHost()+new Scanner(System.in).nextLine();

byte[] buf=str.getBytes();

DatagramPacket dp=new DatagramPacket(buf, buf.length,InetAddress.getByName("192.168.1.255"), 9002);

s.send(dp);

}

s.close();

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

Server.java:

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;

public class Server {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub

try {
//创建一个支持的UDP类，使用端口9002
DatagramSocket s=new DatagramSocket(9002);
byte[] buf=new byte[1024000];
Boolean flag=true;
while(flag){
DatagramPacket dp=new DatagramPacket(buf,1024);
s.receive(dp);
System.out.println(new String(buf));
}
s.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}