获取两个日期之间的所有周开始日期

Question

我想显示两个日期之间所有周的开始日期。

假设，我选择的开始日期为 8th Dec 2015 - 30th Dec 2015，那么它应该 return 结果：

6th Dec 2015
13th Dec 2015
20th Dec 2015
27th Dec 2015

Answer 1

如果您使用 JodaTime library (or willing to switch to it), which is a personal preference of mine, you can use their dayOfWeek() function to do this. It returns a LocalDate.Property object which you can then manipulate to get the minimum value（实际上是一周的开始）。

要获取您想要的日期和return该周的最短日期，请尝试以下操作：

LocalDate myDate = getSelectedDate();
return myDate.dayOfWeek().withMinimumValue();

要获取结束日期之前的所有日期，您可以循环：

List<LocalDate> weekDates = new ArrayList<>();
LocalDate tmp = getFirstDate().dayOfWeek().withMinimumValue();
// Loop until we surpass end date
while(tmp.isBefore(getEndDate())) {
   weekDates.add(tmp);
   tmp = tmp.plusWeeks(1);
}