http://www.51testing.com/html/48/202848-122580.html
//一对多的服务端和客户机：一个服务端能同时服务多个客户端，需要使用多线程来实现
//服务端：调用具体的处理线程完成处理
package com.socket.multiserver;
import java.io.*;
import java.net.*;
import com.socket.multiserver.ChildTh;
public class MyMultiServer {
public static void main(String[] args) throws IOException{
ServerSocket server=new ServerSocket(5678);
while (true){
Socket client=server.accept();
ChildTh child=new ChildTh(client);//用socket实例初始化具体的处理线程对象
//使用Runnable接口和使用extends Thread的区别：
// 如果是使用Runnable接口，需要这么写：
new Thread(child).start();
//注意：不能写成：child.run();
// 如果使用extends Thread，只需要child.start()就可以，因为start()是Thread的方法
}
}
}
============================================================
//处理线程类：
package com.socket.multiserver;
import java.io.*;
import java.net.*;
public class ChildTh implements Runnable{
private Socket client;
public ChildTh(Socket client){
this.client=client;
}
public void run(){
try{
BufferedReader in=new BufferedReader(new InputStreamReader(client.getInputStream()));
PrintWriter ut=new PrintWriter(client.getOutputStream());
while(true){
String str=in.readLine();
System.out.println(str);
out.println("has receive....");
out.flush();
if(str.equals("end"))
break;
}
client.close();
}catch(Exception e){
System.out.println("error in the close the socket!");
e.printStackTrace();
}
finally{
}
}
}
===========================================================
//客户端
package com.socket.multiserver;
import java.net.*;
import java.io.*;
public class MyMultiClient{
static Socket client;
public static void main(String[] args)throws Exception{
client=new Socket(InetAddress.getLocalHost(),5678);
BufferedReader in=new BufferedReader(new InputStreamReader(client.getInputStream()));
PrintWriter ut=new PrintWriter(client.getOutputStream());
//从标准输入接收数据
BufferedReader wt=new BufferedReader(new InputStreamReader(System.in));
while(true){
String str=wt.readLine();
//String str = "jonathan";
out.println(str);
out.flush();
if(str.equals("end")){
break;
}
System.out.println(in.readLine());
}
client.close();
}
}