java - 如何使用 Joda 时间库计算下一个生日

Question

我有两个日期，格式如下 出生日期假设 1995/04/09 和当前日期 2016/07/24 那么我怎样才能获得到下一个生日的剩余月份和天数

public String getNextBirthdayMonths() {
     LocalDate dateOfBirth = new LocalDate(startYear, startMonth, startDay);
     LocalDate currentDate = new LocalDate();

     Period period = new Period(dateOfBirth, currentDate);
     PeriodFormatter periodFormatter = new PeriodFormatterBuilder()
                              .appendMonths().appendSuffix(" Months ")
                              .appendDays().appendSuffix(" Days ")
                              .printZeroNever().toFormatter();

        String nextBirthday = periodFormatter.print(period);
        return "" + nextBirthday;
}

请任何人帮助我提前致谢

Answer 1

根据您的问题，您想使用 Joda 计算下一个生日。 下面的代码将帮助您给出即将到来的生日月份。

   LocalDate dateOfBirth = new LocalDate(1995, 4, 9);
   LocalDate currentDate = new LocalDate();
   // Take birthDay  and birthMonth  from dateOfBirth 
   int birthDay = dateOfBirth.getDayOfMonth();
   int birthMonth = dateOfBirth.getMonthOfYear();
   // Current year's birthday
   LocalDate currentYearBirthDay = new LocalDate().withDayOfMonth(birthDay)
                        .withMonthOfYear(birthMonth);
   PeriodType monthDay = PeriodType.yearMonthDayTime().withYearsRemoved();
   PeriodFormatter periodFormatter = new PeriodFormatterBuilder()
        .appendMonths().appendSuffix(" Months ").appendDays()
        .appendSuffix(" Days ").printZeroNever().toFormatter();
   if (currentYearBirthDay.isAfter(currentDate)) {
       Period period = new Period(currentDate, currentYearBirthDay,monthDay );
       String currentBirthday = periodFormatter.print(period);
       System.out.println(currentBirthday );
   } else {
        LocalDate nextYearBirthDay =currentYearBirthDay.plusYears(1);
        Period period = new Period(currentDate, nextYearBirthDay ,monthDay );
        String nextBirthday = periodFormatter.print(period);
        System.out.println(nextBirthday);
   }

输出:

8 Months 16 Days