public void exit(){
		out.println("ȷҪ˳(Y/N)");
		String input = in.next();
		if(input.equalsIgnoreCase("y") || input.equalsIgnoreCase("yes")){
			if(isLogin){
				logout();
			}
			ExitEvent event = EventBuilder.buildExitEvent();
			eventContainer.push(event);
			exe.shutdownNow();
			isRunning = false;
			try {
				exe.awaitTermination(60, TimeUnit.SECONDS);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}