JAVA网络编程——简单的聊天程序

来源：互联网发布：淘宝运费险是怎么算的编辑：程序博客网时间：2024/05/16 19:03

简单的交互，可以互相发送信息。

NetSendDemo.java

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.*;
public class NetSendDemo {

public static void main(String[] args) {
  Thread t1 = new NetReceive();
  t1.start();
  try {
   DatagramSocket ds = new DatagramSocket();
   byte[] buf = null;
   InetAddress is = InetAddress.getByName("127.0.0.1");

   BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
   while((buf=br.readLine().getBytes())!=null){

   DatagramPacket dp = new DatagramPacket(buf,buf.length,is,9000);
   ds.send(dp);
   }
   ds.close();
  } catch (SocketException e) {
   e.printStackTrace();
  } catch (Exception e){

  }

}}

class NetReceive extends Thread{

public void run(){

  DatagramSocket ds;
  try {
   ds = new DatagramSocket(9001);
   while(true){
    byte[] buf = new byte[1024];
    DatagramPacket dp = new DatagramPacket(buf,buf.length);
    ds.receive(dp);
    String ip = dp.getAddress().getHostAddress();
    String data = new String(dp.getData(),0,dp.getLength());
    int port = dp.getPort();
    System.out.println(ip+":"+data+":"+port);}
  } catch (Exception e) {
   e.printStackTrace();
  }
}
}

NetReceiveDemo.java

import java.net.*;
import java.io.*;
public class NetReceiveDemo {
public static void main(String[] args) throws Exception {
  DatagramSocket ds = new DatagramSocket(9000);
  Thread t2 = new NetSend();
  t2.start();
  while(true){
  byte[] buf = new byte[1024];
  DatagramPacket dp = new DatagramPacket(buf,buf.length);
  ds.receive(dp);
  String ip = dp.getAddress().getHostAddress();
  String data = new String(dp.getData(),0,dp.getLength());
  int port = dp.getPort();
  System.out.println(ip+":"+data+":"+port);
  }


}

}
class NetSend extends Thread{
public void run(){
try {
  DatagramSocket ds = new DatagramSocket();
  byte[] buf = null;
  InetAddress is = InetAddress.getByName("127.0.0.1");

  BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  while((buf=br.readLine().getBytes())!=null){

  DatagramPacket dp = new DatagramPacket(buf,buf.length,is,9009);
  ds.send(dp);
  }
  ds.close();
} catch (SocketException e) {
  e.printStackTrace();
} catch (Exception e){

}
}

}