public static String presenceValueToDisplayString(int value)
	{
		switch(value){
	    	case Presence.ONLINE:	return "电脑在线";
	    	case Presence.BUSY:		return "电脑忙碌";
	    	case Presence.AWAY:		return "电脑离开";
	    	case Presence.OFFLINE:	return "离线";
	    	case Presence.ROBOT:	return "机器人在线";
	    	default:	return "未知状态";
    	}
	}