import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
/*
* 编写一个聊天程序
* 有收数据的部分,和发数据的部分
* 这两部分需要同时执行
* 那就需要用到多线程技术
* 一个线程控制收,一个线程控制发
*
* 因为收和发动作是不一致的,所以要定义两个run方法。
* 而且这两个方法要封装到不同的类中。
*/
class Send implements Runnable{
private DatagramSocket ds;
public Send (DatagramSocket ds){
this.ds=ds;
}
@Override
public void run() {
try {
BufferedReader bufr=new BufferedReader(new InputStreamReader(System.in));
String line=null;
while((line=bufr.readLine())!=null){
System.out.println("开始输入数据了");
if("866".equals(line))
break;
byte[]buf=line.getBytes();
DatagramPacket dp=new DatagramPacket(buf, buf.length,InetAddress.getByName("192.168.3.255"),10002);
ds.send(dp);
System.out.println("数据发送完成");
}
} catch (Exception e) {
throw new RuntimeException("发送端失败");
}
}
}
class Race implements Runnable{
private DatagramSocket ds;
public Race (DatagramSocket ds){
this.ds=ds;
}
@Override
public void run() {
System.out.println("开始接收数据了");
try {
while(true){
byte[]buf=new byte[1024];
System.out.println(buf.length);
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+"::"+port+"::"+data);
System.out.println("数据接收完成");
}
} catch (Exception e) {
throw new RuntimeException("接收端失败");
}
}
}
class ChatDemo{
public static void main(String[]args)throws Exception{
DatagramSocket sendSocket=new DatagramSocket();
DatagramSocket receSocket=new DatagramSocket(10002);
new Thread(new Send(sendSocket)).start();
new Thread(new Race(receSocket)).start();
}
}
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