Java进行并发多连接socket编程
Java多个客户端同时连接服务端，在现实生活中用得比较多。同时执行多项任务，第一想到的当然是多线程了。下面用多线程来实现并发多连接。

import java.net.*;import java.io.*;public class ThreadServer extends Thread{    private Socket client;    public ThreadServer(Socket c)    {        this.client=c;    }    public void run()    {        try        {            BufferedReader in=new BufferedReader(new InputStreamReader(client.getInputStream()));            PrintWriter out=new PrintWriter(client.getOutputStream());            //Mutil User but can't parallel            while (true)            {                String str=in.readLine();                System.out.println(str);                out.println("has receive....");                out.flush();                if (str.equals("end"))                    break;            }            client.close();        }        catch (IOException ex)        {        }        finally        {        }    }    public static void main(String[] args)throws IOException    {        ServerSocket server=new ServerSocket(8000);        while (true)        {            //transfer location change Single User or Multi User            ThreadServer mu=new ThreadServer(server.accept());            mu.start();        }    }}