java scoket (UDP通信模型)简易聊天室

import java.net.DatagramPacket;
import java.net.DatagramSocket;

/**
* 接收线程
*
* @author xiaoduc
*
*/
public class ReceiveThread extends Thread {

private DatagramSocket ds;

public ReceiveThread(int port) {
super();
try {
this.ds = new DatagramSocket(port);
} catch (Exception e) {
e.printStackTrace();
}
}

@Override
public void run() {
try {
//创建byte数组
byte[] buff=new byte[1024];
//创建一个数据包对象
DatagramPacket dp=new DatagramPacket(buff, 1024);
//永真循环
while(true){
ds.receive(dp);//接收消息
String str=new String(dp.getData(),0,dp.getLength());//得到数据
System.out.println("接收："+str);//打印消息
}
} catch (Exception e) {
e.printStackTrace();
}finally {
ds.close();
}
}
}

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

/**
* 发送线程类
* @author xiaoduc
*
*/
public class SendThread extends Thread{
private DatagramSocket ds;
private int sendPort;

public SendThread(int port,int sendPort){
super();
this.sendPort=sendPort;
try {
this.ds=new DatagramSocket(port);
} catch (Exception e) {
e.printStackTrace();
}
}

@Override
public void run() {
try {
//循环接收用户输入
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
String str=null;
while((str=br.readLine())!=null){
//创建Datagrampacket对象
DatagramPacket dp=new DatagramPacket(str.getBytes(), 0,str.length(),InetAddress.getByName("localhost"),sendPort);
ds.send(dp);//发送数据
System.out.println("发送："+str);//打印
}
} catch (Exception e) {
e.printStackTrace();
}finally {
ds.close();
}
}
}

public class Chat {
public static void main(String[] args) {
//启动发送线程
new SendThread(1091, 1099).start();

}
}

public class ReceiveChat {
public static void main(String[] args) {
//启动接收线程
new ReceiveThread(1099).start();
}
}