| | |
| | | import java.text.DateFormatSymbols; |
| | | import java.text.ParseException; |
| | | import java.text.SimpleDateFormat; |
| | | import java.time.LocalDate; |
| | | import java.time.Period; |
| | | import java.util.Calendar; |
| | | import java.util.Date; |
| | | import java.util.Enumeration; |
| | |
| | | calo.setTime(oldDate); |
| | | caln.setTime(newDate); |
| | | if(type==0||type==1){ |
| | | return calculateDaysBetweenDates(caln, calo) ; |
| | | return calculateDaysBetweenDates(caln, calo) + 1 ; |
| | | }else if(type==2){ |
| | | |
| | | int day = caln.get(Calendar.DATE); |
| | |
| | | return calendar.getTime(); |
| | | } |
| | | |
| | | /** |
| | | * 获取指定日期的下个月第一天 |
| | | * @param date |
| | | * @return |
| | | */ |
| | | public static Date getNextMonthFirst(Date date){ |
| | | Calendar calendar = Calendar.getInstance(); |
| | | calendar.setTime(date); |
| | | calendar.add(Calendar.MONTH, 1); // 将日历的月份增加1 |
| | | calendar.set(Calendar.DAY_OF_MONTH, 1); // 设置为下个月的第一天 |
| | | return calendar.getTime(); |
| | | } |
| | | |
| | | |
| | | |
| | | |
| | | public static String afterDateToStr(Integer days){ |
| | | Date date = new Date(); |
| | |
| | | } |
| | | |
| | | |
| | | /** |
| | | * 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.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)); |
| | | |
| | | |
| | | // 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)); |
| | | // 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" |
| | | // ) |
| | | |
| | | // ); |
| | | |
| | | LocalDate startDate= LocalDate.of(2021,2,28); |
| | | LocalDate endDate =LocalDate.of(2022,4,5); |
| | | Period period = Period.between(startDate,endDate); |
| | | int months = period.getYears()* 12 + period.getMonths(); |
| | | System.out.println("Months between the two dates: " + months); |
| | | |
| | | |
| | | /* Calendar calo = Calendar.getInstance(); |
| | | Calendar caln = Calendar.getInstance(); // ,"yyyy-MM-dd HH:mm:ss" |
| | | caln.setTime(DateUtil.StringToDate("2024-03-06 23:59:59")); |
| | | calo.setTime(DateUtil.StringToDate("2024-02-05 00:00:00")); |
| | | System.out.println( DateUtil.calculateMonthsBetweenDates(calo,caln));*/ |
| | | |
| | | // System.out.println( |
| | | // DateUtil.DateToStr( |
| | | // DateUtil.getNextMonthFirst(new Date()) |
| | | // ,"yyyy-MM-dd HH:mm:ss") |
| | | // |
| | | // ); |
| | | // System.out.println( |
| | | // DateUtil.DateToStr( |
| | | // DateUtil.getNextMonthFirst( |
| | | // DateUtil.StringToDate("2024-12-29 21:59:59") |
| | | // ) |
| | | // ,"yyyy-MM-dd HH:mm:ss") |
| | | // |
| | | // ); |
| | | |
| | | |
| | | |
| | | } |
| | | |
| | | |