public void login(){
		if(isLogin){
			out.println("Ѿ¼");
			return;
		}
		User user = null;
		out.print("ĵ¼ǳƣ");
		String nickname = in.next();
		String ip = null;
		try {
			ip = InetAddress.getLocalHost().getHostAddress();
		} catch (UnknownHostException e) {
			e.printStackTrace();
		}
		user = new User(nickname, ip);
		LoginEvent event = EventBuilder.buildLoginEvent(user);
		eventContainer.push(event);
		this.currentUser = user;
		this.isLogin = true;
	}