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 strDate1
     * @param strDate2
     * @return
     */
    public static int dispersionMonth2(String strDate1, String strDate2) ...{
        int iMonth = 0;
        int flag = 0;
        try ...{
            Calendar objCalendarDate1 = Calendar.getInstance();
            objCalendarDate1.setTime(DateFormat.getDateInstance().parse(strDate1));

            Calendar objCalendarDate2 = Calendar.getInstance();
            objCalendarDate2.setTime(DateFormat.getDateInstance().parse(strDate2));

            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) ...{
        }
        return iMonth;
    }