code: public static int getDiffMonth(Date start, Date end) {
  //        Calendar startCalendar = Calendar.getInstance();
  //        startCalendar.setTime(start);
  //        Calendar endCalendar = Calendar.getInstance();
  //        endCalendar.setTime(end);
  //        Calendar temp = Calendar.getInstance();
  //        temp.setTime(end);
  //        temp.add(Calendar.DATE, 1);
  //        int year = endCalendar.get(Calendar.YEAR)
  //                - startCalendar.get(Calendar.YEAR);
  //        int month = endCalendar.get(Calendar.MONTH)
  //                - startCalendar.get(Calendar.MONTH);
  //        if ((startCalendar.get(Calendar.DATE) == 1)
  //                && (temp.get(Calendar.DATE) == 1)) {
  //            return year * 12 + month + 1;
  //        } else if ((startCalendar.get(Calendar.DATE) != 1)
  //                && (temp.get(Calendar.DATE) == 1)) {
  //            return year * 12 + month + 1;
  //        } else if ((startCalendar.get(Calendar.DATE) == 1)
  //                && (temp.get(Calendar.DATE) != 1)) {
  //            return year * 12 + month + 1;
  //        } else {
  //            return (year * 12 + month - 1) < 0 ? 0 : (year * 12 + month);
  //        }
      	Calendar startCalendar = Calendar.getInstance();
  		startCalendar.setTime(start);
  		Calendar endCalendar = Calendar.getInstance();
  		endCalendar.setTime(end);
  		return (endCalendar.get(Calendar.YEAR) - startCalendar.get(Calendar.YEAR)) * 12
  				+ endCalendar.get(Calendar.MONTH) - startCalendar.get(Calendar.MONTH);
      }
docs: 获取两个时间相差月份