public static  int monthDiffs(Date endDate,Date startDate ){
		Calendar end = Calendar.getInstance();
		Calendar start = Calendar.getInstance();
		end.setTime(endDate);
		start.setTime(startDate);
		//相差的月數
	    int month = (end.get(Calendar.MONTH) + ( (end.get(Calendar.YEAR) - start.get(Calendar.YEAR))*12 ) - start.get(Calendar.MONTH));
		//int month = DateUtils.dateDiff('M', end, start);//相差的月數
		int startDays = DateUtils.getDayOfMonth(startDate);//專案開始日期的相應月份共有多少天
		int endDays = DateUtils.getDayOfMonth(endDate);//專案結束日期的相應月份共有多少天
		
		if(startDays== start.get(Calendar.DAY_OF_MONTH)){//開始日期是否是月末的最後一天
			if(endDays == end.get(Calendar.DAY_OF_MONTH)){//結束日期月末最後一天
				month++;
			}else{
				if(end.get(Calendar.DAY_OF_MONTH)>start.get(Calendar.DAY_OF_MONTH)){//結束日期當月天數 > 開始日期單月天數
					month++;
				}
			}
		}else{
			if(endDays==end.get(Calendar.DAY_OF_MONTH)){//結束日期月末最後一天
				month++;
			}else{
				if(end.get(Calendar.DAY_OF_MONTH)>start.get(Calendar.DAY_OF_MONTH)){
					month++;
				}
			}
		}
		return month;
	}