线程池server

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;


public class Server
{
//服务器端口
    private static final int SERVERPORT = 54321; 
    //客户端连接
    private static List<Socket> mClientList = new ArrayList<Socket>(); 
    //线程池
    private ExecutorService mExecutorService;  
    //ServerSocket对象
    private ServerSocket mServerSocket;  
    //开启服务器
    public static void main(String[] args)
{
new Server();
}
public Server()
{
try
{
//设置服务器端口
mServerSocket = new ServerSocket(SERVERPORT);
//创建一个线程池
mExecutorService = Executors.newCachedThreadPool();
System.out.println("start...");
//用来临时保存客户端连接的Socket对象
Socket client = null;
while (true)
{
//接收客户连接并添加到list中
client = mServerSocket.accept(); 
mClientList.add(client);
//开启一个客户端线程
mExecutorService.execute(new ThreadServer(client));
}
}
catch (IOException e)
{
e.printStackTrace();
}
}   
    //每个客户端单独开启一个线程
static class ThreadServer implements Runnable
{
private Socket mSocket;
private BufferedReader mBufferedReader;
private PrintWriter mPrintWriter;
private String mStrMSG;


public ThreadServer(Socket socket) throws IOException
{
this.mSocket = socket;
mBufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
mStrMSG = "user:"+this.mSocket.getInetAddress()+" come total:" + mClientList.size();
sendMessage();
}
public void run()
{
try
{
while ((mStrMSG = mBufferedReader.readLine()) != null)
{
if (mStrMSG.trim().equals("exit"))
{
//当一个客户端退出时
mClientList.remove(mSocket);
mBufferedReader.close();
mPrintWriter.close();
mStrMSG = "user:"+this.mSocket.getInetAddress()+" exit total:" + mClientList.size();
mSocket.close();
sendMessage();
break;
}
else
{
mStrMSG = mSocket.getInetAddress() + ":" + mStrMSG;
sendMessage();
}
}
}
catch (IOException e)
{
e.printStackTrace();
}
}
//发送消息给所有客户端
private void sendMessage() throws IOException
{
System.out.println(mStrMSG);
for (Socket client : mClientList)
{
mPrintWriter = new PrintWriter(client.getOutputStream(), true);
mPrintWriter.println(mStrMSG);
}
}
}
}