计算Java 8中两个日期之间的天数 [英] Calculate days between two dates in Java 8
问题描述
我知道有很多关于如何获得的问题,但我想要和使用新的Java 8 Date api的例子。我也知道JodaTime库,但我想要一种没有外部库的工作方式。
I know there are lots of questions on SO about how to get, but I want and example using new Java 8 Date api. I also know JodaTime library, but I want a work way without external libraries.
函数需要抱怨这些限制:
Function needs to complain with these restrictions:
- 防止日期保存时间错误
- 输入是两个Date的对象(没有时间,我知道localdatetime,但我需要处理日期实例)
推荐答案
如果您想要逻辑日历日,请使用 来自 方法api / java / time / temporal / ChronoUnit.htmlrel =noreferrer>
: java.time.temporal.ChronoUnit
If you want logical calendar days, use DAYS.between()
method from java.time.temporal.ChronoUnit
:
LocalDate dateBefore;
LocalDate dateAfter;
long daysBetween = DAYS.between(dateBefore, dateAfter);
如果你想要文字24小时,(持续时间),您可以使用 持续时间
而不是:
If you want literal 24 hour days, (a duration), you can use the Duration
class instead:
LocalDate today = LocalDate.now()
LocalDate yesterday = today.minusDays(1);
// Duration oneDay = Duration.between(today, yesterday); // throws an exception
Duration.between(today.atStartOfDay(), yesterday.atStartOfDay()).toDays() // another option
有关更多信息,请参阅本文档(以及其他文档:Oracle的Java 8)。
For more information, refer to this document (and other documents re:Java 8 from Oracle).
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