public void runServer(){
			ExecutorService pool=Executors.newFixedThreadPool(CONCURRENT_ACCESS);
			ServerSocket ss = null;
			try {
				ss = new ServerSocket(PORT);
			} catch (IOException e1) {
				e1.printStackTrace();
			}
			try {
				while(isrunable){
				System.out.println("Ѿɹ ڼ"+PORT+" ˿");
				Socket clientSocket=ss.accept();//ʼ
				//Ϊû䴦߳
				pool.submit(new UserAgentThread(clientSocket));
//				new Thread(new UserAgentThread(clientSocket)).start();
				
				
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
	
	}