Joda 时间：计算到下一个完整间隔的时间

问题描述

我正在实施一个应用程序，用户可以在其中创建具有截止日期的任务并重复它们，例如每 x 天、每 x 周、每 x 个月等重复一次。

当任务到期时，我想根据定义的时间间隔计算下一个（重复）到期日期。我的实施几周有效，但几个月无效，因为我无法将几个月转换为分钟。

AlarmHelper.java

// Works
static LocalDateTime getNextWeeklyIntervalDate(LocalDateTime creationTime,LocalDateTime dueTime,int intervalInWeeks) {
    int intervalInMinutes = Weeks.weeks(intervalInWeeks).toStandardMinutes().getMinutes();
    int timePassed = Minutes.minutesBetween(creationTime,dueTime).getMinutes();
    int rest = timePassed % intervalInMinutes;
    int minutesToNextFullInterval = intervalInMinutes - rest;
    return dueTime.plusMinutes(minutesToNextFullInterval );
}

// How to implement this analogous to weekly,but for monthly intervals? toStandardMinutes() does not exist for months  
static LocalDateTime getNextMonthlyIntervalDate(LocalDateTime creationTime,int intervalInMonth) {
    int intervalInMinutes = Months.months(intervalInMonth).toStandardMinutes().getMinutes(); // toStandardMinutes() does not exist
}

AlarmHelperTest.java

// User created the task on 01.01.2021 (January 1st,2021) and want to repeat it weekly.
// So the intervals are 08.01.2021,15.01.2021 etc.
// In the test the task is due on 12.01.2021,which means the next weekly interval is fulfilled on 15.01.2021.

//The test passes
 @Test
 public void TestGetNextWeeklyIntervalDate() {
    LocalDateTime creation = createLocalDateTime("01.01.2021 06:30:00");
    LocalDateTime due = createLocalDateTime("12.01.2021 05:30:00");
    LocalDateTime expected = createLocalDateTime("15.01.2021 06:30:00");
    LocalDateTime result = AlarmHelper.getNextWeeklyIntervalDate(creation,due,1);
    assertEquals(expected,result);
}

解决方法

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java java jodatime