Client端代码：1
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27import java.net.*;
import java.io.*;
public class UDPClient{
public static void main(String args[]){
DatagramSocket socket = null;
DatagramPacket packet = null;
InetAddress address = null;
String s = "send the data , please !";
byte buf[] = new byte[256];
buf = s.getBytes();
byte ip[] = {(byte)127,(byte)0,(byte)0,(byte)1};
try{
address = InetAddress.getByAddress(ip);
socket = new DatagramSocket();
packet = new DatagramPacket(buf,buf.length,address,1080);
socket.send(packet);
Thread.sleep(2000);
packet = new DatagramPacket(buf,buf.length);
socket.receive(packet);
s = new String(packet.getData());
System.out.println("received data is :"+s);
}catch(Exception e){
System.out.println(e.toString());
}
socket.close();
}
}
Server端代码：1
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32import java.net.*;
import java.io.*;
import java.util.*;
public class UDPSever{
public static void main(String args[]){
DatagramSocket socket1=null;
DatagramPacket packet1=null;
String s1;
byte buf1[]= new byte[256];
InetAddress address1 = null;
int port1;
Date date1;
try{
socket1 = new DatagramSocket(1080);
packet1 = new DatagramPacket(buf1,buf1.length);
socket1.receive(packet1);
s1=new String(packet1.getData());
System.out.println("received request:"+s1);
port1 = packet1.getPort();
address1= packet1.getAddress();
date1 = new Date();
s1 = date1.toString();
buf1= s1.getBytes();
packet1= new DatagramPacket(buf1,buf1.length,address1,port1);
socket1.send(packet1);
Thread.sleep(2000);
}catch(Exception e){
System.out.println(e.toString());
}
socket1.close();
}
}
如果把这IP地址改改。就可以做简单的网络通信。
网络编程刚接触，慢慢学习。