例子中是系統預設的日期格式

public static boolean isSameDate(Date date1, Date date2) {
           try {
            Calendar cal1 = Calendar.getInstance();
               cal1.setTime(date1);

               Calendar cal2 = Calendar.getInstance();
               cal2.setTime(date2);

               boolean isSameYear = cal1.get
 
(Calendar.YEAR) == cal2
                       .get(Calendar.YEAR);
               boolean isSameMonth = isSameYear
                       && cal1.get(Calendar.MONTH) == cal2.get(Calendar.MONTH);
               boolean isSameDate = isSameMonth
                       && cal1.get(Calendar.DAY
 
_OF_MONTH) == cal2
                               .get(Calendar.DAY_OF_MONTH);

               return isSameDate;
        } catch (Exception e) {
            log.error("[RatingEngine] error occurred: ERROR ", e);
        }
        return false;


       }

@Test
    public void test8(){
        Date
 
 date =new Date();
        System.out.println(date);
        System.out.println(isSameDate(date,new Date()));
    }

Tue Oct 17 09:38:24 CST 2017
true

else

public boolean isBeforeMonth(String beforeMonth, String currentMonth) {
        // TODO Auto-generated method stub
          Date bm=DateUtil.parse(beforeMonth, "yyyy-MM");
          Date cm=DateUtil.parse(currentMonth,"yyyy-MM");
          Calendar cmCal=Calendar.getInstance();
          Calendar bmCal=Calendar.getInstance();
          cmCal.setTime(cm);
          cmCal.add(Calendar.MONTH,-1);
          cm=cmCal.getTime();
          bmCal.setTime(bm);
          bmCal.getTime();
          boolean isSameYear = cmCal.get(Calendar.YEAR) == bmCal
                   .get(Calendar.YEAR);
           boolean isSameMonth = isSameYear
                   && cmCal.get(Calendar.MONTH) == bmCal.get(Calendar.MONTH);
         /*if(DateUtil.isSameDate(bm, cm)){
              return true;
          }*/
        return isSameMonth;
    }