Calendar计算两个日期相差几个月

1.只考虑月，不考虑日，年相减乘以12，加月相减

public static int betweenMonthByTwoCalendar(Calendar startCalendar,Calendar endCalendar){ 
		//判断日期大小 
		if(startCalendar.after(endCalendar)){ 
			Calendar temp = startCalendar; 
			startCalendar = endCalendar; 
			endCalendar = temp; 
		} 
		int startYear = startCalendar.get(Calendar.YEAR); 
		int endYear = endCalendar.get(Calendar.YEAR); 
		int startMonth = startCalendar.get(Calendar.MONTH); 
		int endMonth = endCalendar.get(Calendar.MONTH); 
		int monthNum = (endYear - startYear)*12+(endMonth-startMonth); 
		return monthNum; 
	}