计算两个日期之间相差的月数

	/**
     * 计算两个日期之间相差的月数
     * @param date1
     * @param date2
     * @return
     */
    private int getMonths(Date date1, Date date2){
        int iMonth = 0;
        int flag = 0;
        try{
            Calendar objCalendarDate1 = Calendar.getInstance();
            objCalendarDate1.setTime(date1);

            Calendar objCalendarDate2 = Calendar.getInstance();
            objCalendarDate2.setTime(date2);

            if (objCalendarDate2.equals(objCalendarDate1))
                return 0;
            if (objCalendarDate1.after(objCalendarDate2)){
                Calendar temp = objCalendarDate1;
                objCalendarDate1 = objCalendarDate2;
                objCalendarDate2 = temp;
            }
            if (objCalendarDate2.get(Calendar.DAY_OF_MONTH) < objCalendarDate1.get(Calendar.DAY_OF_MONTH))
                flag = 1;

            if (objCalendarDate2.get(Calendar.YEAR) > objCalendarDate1.get(Calendar.YEAR))
                iMonth = ((objCalendarDate2.get(Calendar.YEAR) - objCalendarDate1.get(Calendar.YEAR))
                        * 12 + objCalendarDate2.get(Calendar.MONTH) - flag)
                        - objCalendarDate1.get(Calendar.MONTH);
            else
                iMonth = objCalendarDate2.get(Calendar.MONTH)
                        - objCalendarDate1.get(Calendar.MONTH) - flag;

        } catch (Exception e){
        	e.printStackTrace();
        }
        return iMonth;
    }