|  |  | 
 |  |  |         calo.setTime(oldDate); | 
 |  |  |         caln.setTime(newDate); | 
 |  |  |         if(type==0||type==1){ | 
 |  |  |             return    calculateDaysBetweenDates(caln, calo) + 1; | 
 |  |  |             return    calculateDaysBetweenDates(caln, calo) ; | 
 |  |  |         }else if(type==2){ | 
 |  |  |             return    calculateMonthsBetweenDates(caln, calo) + 1; | 
 |  |  |  | 
 |  |  |             int day = caln.get(Calendar.DATE); | 
 |  |  |             if(day == 1){ | 
 |  |  |                 return    calculateMonthsBetweenDates(caln, calo) + 1; | 
 |  |  |             }else{ | 
 |  |  |                 return    calculateMonthsBetweenDates(caln, calo); | 
 |  |  |             } | 
 |  |  |  | 
 |  |  |         }else if(type==3){ | 
 |  |  |             return    calculateYearsBetweenDates(caln, calo) + 1; | 
 |  |  |         } | 
 |  |  | 
 |  |  |         return sdfLongTimePlus.parse(sdfLongTimePlus.format(date)); | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     public static void main(String[] args) { | 
 |  |  |         try { | 
 |  |  |             System.out.println(RandomStringUtils.randomNumeric(3)); | 
 |  |  |         } catch (Exception ex) { | 
 |  |  |             ex.printStackTrace(); | 
 |  |  |         } | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     /** | 
 |  |  |      * | 
 |  |  | 
 |  |  |         String nowDateString = dateTypeToString(new Date(), fFormatStr); | 
 |  |  |         return nowDateString; | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |  | 
 |  |  |     /** | 
 |  |  |      * @ author zhangyong @ 获取当月的第一天,2009-05-01 | 
 |  |  | 
 |  |  |         cal.add(Calendar.MINUTE,minutes); | 
 |  |  |         return cal.getTime(); | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |  | 
 |  |  |     /** | 
 |  |  |      * 计算多少自然年/月/日后的日期 | 
 |  |  |      * @param startDate 开始日期 | 
 |  |  |      * @param type  0=日;1=月;2=年; | 
 |  |  |      * @param cycle 周期  X月 | 
 |  |  |      * @return | 
 |  |  |      */ | 
 |  |  |     public static Date afterDateByType(Date startDate,Integer type,Integer cycle){ | 
 |  |  |         Calendar calendar = Calendar.getInstance(); | 
 |  |  |         calendar.setTime(startDate); | 
 |  |  |         if(type==0){ | 
 |  |  |             calendar.add(Calendar.DATE, cycle); | 
 |  |  |         }else if(type==1){ | 
 |  |  |             calendar.add(Calendar.MONTH, cycle); | 
 |  |  |         }else if(type == 2) { | 
 |  |  |             calendar.add(Calendar.YEAR, cycle); | 
 |  |  |         } | 
 |  |  |         return calendar.getTime(); | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |  | 
 |  |  |  | 
 |  |  |     public static Integer monthDays(Date date){ | 
 |  |  |         Calendar calendar = Calendar.getInstance(); | 
 |  |  |         calendar.setTime(date); | 
 |  |  |         // 获取当前年份、月份(注意月份从0开始计算) | 
 |  |  |         int year = calendar.get(Calendar.YEAR); | 
 |  |  |         int month = calendar.get(Calendar.MONTH) + 1; | 
 |  |  |         // 根据年份和月份判断闰年情况 | 
 |  |  |         boolean isLeapYear = (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0); | 
 |  |  |  | 
 |  |  |         // 根据不同月份设定每个月的天数 | 
 |  |  |         switch (month) { | 
 |  |  |             case 2: | 
 |  |  |                 if (isLeapYear) { | 
 |  |  |                     return 29; | 
 |  |  |                 } else { | 
 |  |  |                     return 28; | 
 |  |  |                 } | 
 |  |  |             case 4: | 
 |  |  |             case 6: | 
 |  |  |             case 9: | 
 |  |  |             case 11: | 
 |  |  |                  return 30; | 
 |  |  |             default: | 
 |  |  |                  return 31; | 
 |  |  |         } | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |  | 
 |  |  |     /** | 
 |  |  |      * 拼接日期数据 | 
 |  |  |      * @param date | 
 |  |  |      * @param optType   1:每日开始 2:每日结束 3:昨日结束 | 
 |  |  |      * @return | 
 |  |  |      */ | 
 |  |  |     public static Date getMontageDate(Date date ,Integer optType) { | 
 |  |  |         String strShortDate = DateUtil.dateToString(date,"yyyy-MM-dd"); | 
 |  |  |         if(optType.equals(1)){ | 
 |  |  |             return DateUtil.StringToDate(strShortDate +" 00:00:00"); | 
 |  |  |         }else if(optType.equals(2)){ | 
 |  |  |             return DateUtil.StringToDate(strShortDate +" 23:59:59"); | 
 |  |  |         }else if(optType.equals(3)){ | 
 |  |  |             strShortDate = DateUtil.dateToString(DateUtil.getDateBetween(date,-1),"yyyy-MM-dd"); | 
 |  |  |             return DateUtil.StringToDate(strShortDate +" 23:59:59"); | 
 |  |  |         }else{ | 
 |  |  |             return null; | 
 |  |  |         } | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |  | 
 |  |  |     public static void main(String[] args) { | 
 |  |  | //       System.out.println(DateUtil.DateToStr(DateUtil.afterDateByType( | 
 |  |  | //               DateUtil.stringToDate("2024-02-01","yyyy-MM-dd") | 
 |  |  | //               ,1,1),"yyyy-MM-dd HH:mm:ss")); | 
 |  |  |  | 
 |  |  | //        System.out.println( DateUtil.daysBetweenDates(DateUtil.stringToDate("2024-02-29","yyyy-MM-dd"), | 
 |  |  | //                DateUtil.stringToDate("2024-02-01","yyyy-MM-dd")) | 
 |  |  | //        ); | 
 |  |  | // | 
 |  |  | //        System.out.println(DateUtil.calculateBetween(DateUtil.StringToDate("2024-02-29 23:59:59"),DateUtil.StringToDate("2024-02-01 00:00:00"),0)); | 
 |  |  |  | 
 |  |  |  | 
 |  |  |         System.out.println( | 
 |  |  |                 DateUtil.DateToStr( | 
 |  |  |  | 
 |  |  |                 DateUtil.getMontageDate(DateUtil.StringToDate("2024-02-29 21:59:59"),1) ,"yyyy-MM-dd HH:mm:ss" | 
 |  |  |                 ) | 
 |  |  |         ); | 
 |  |  |  | 
 |  |  |  | 
 |  |  |  | 
 |  |  |         System.out.println( | 
 |  |  |  | 
 |  |  |                 DateUtil.DateToStr( | 
 |  |  |  | 
 |  |  |                         DateUtil.getMontageDate(DateUtil.StringToDate("2024-02-29 21:59:59"),2) ,"yyyy-MM-dd HH:mm:ss" | 
 |  |  |                 ) | 
 |  |  |  | 
 |  |  |         ); | 
 |  |  |  | 
 |  |  |         System.out.println( | 
 |  |  |  | 
 |  |  |                 DateUtil.DateToStr( | 
 |  |  |  | 
 |  |  |                         DateUtil.getMontageDate(DateUtil.StringToDate("2024-02-29 21:59:59"),3) ,"yyyy-MM-dd HH:mm:ss" | 
 |  |  |                 ) | 
 |  |  |  | 
 |  |  |         ); | 
 |  |  |  | 
 |  |  | //        Calendar calo = Calendar.getInstance(); | 
 |  |  | //        Calendar caln = Calendar.getInstance(); // ,"yyyy-MM-dd HH:mm:ss" | 
 |  |  | //        caln.setTime(DateUtil.StringToDate("2024-02-29 23:59:59")); | 
 |  |  | //        calo.setTime(DateUtil.StringToDate("2024-02-01 00:00:00")); | 
 |  |  | //        System.out.println( DateUtil.calculateDaysBetweenDates(calo,caln)); | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |  | 
 |  |  | } |