java - 使用 java.time.DayOfWeek 设置 Calendar.DAY_OF_WEEK

Question

目前我有一些代码可以在基于 java8 java.time.DayOfWeek 对象的日历上设置 DAY_OF_WEEK。由于这些类型的整数值未对齐，即

Calendar.SUNDAY == 1

where as

DayOfWeek.SUNDAY == 7

我想知道是否有推荐的方法可以从一种转换为另一种。目前我正在这样做。

calendar.set(Calendar.DAY_OF_WEEK, dayOfWeek.getValue() == 7 ? 1 : dayOfWeek.getValue() + 1);

Answer 1

我还需要将日历天数转换为 DayOfWeek 并返回:

fun dayOfWeekToCalendarDay(day: DayOfWeek): Int {
    return (day.value % 7) + 1
}

fun calendarDayToDayOfWeek(calendarDay: Int): DayOfWeek {
    val temp = (calendarDay + 6) % 7
    return if (temp == 0) DayOfWeek.SUNDAY else DayOfWeek.of(temp)
}