java - 如何使用 Joda time libaray 计算下一个生日

Question

我有两个日期格式，例如出生日期假设 1995/04/09 和当前日期 2016/07/24 那么我怎样才能得到下一个生日的剩余月份和日期

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谢谢

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个月16天

Answer 2

我会找到下一个生日日期

LocalDate today = new LocalDate();
LocalDate birthDate = new LocalDate(1900, 7, 12);

int age = new Period(birthDate, today).getYears();

LocalDate nextBirthday = birthDate.plusYears(age + 1);

然后计算距离该日期还有多长时间（以月和日为单位）

PeriodType monthsAndDays = PeriodType.yearMonthDay().withYearsRemoved();
Period leftToBirthday = new Period(today, nextBirthday, monthsAndDays);

PeriodFormatter periodFormatter = new PeriodFormatterBuilder()
        .appendMonths().appendSuffix(" Months ")
        .appendDays().appendSuffix(" Days ")
        .toFormatter();

return periodFormatter.print(leftToBirthday);

Answer 3