好的,以下是一个概述Java 8日期功能,并给出实现一个使用Stream流生成从指定日期到当前日期的所有日期/时间范围的例子。
Java 8引入了新的日期/时间API,它提供了更好的API设计、类型安全、线程安全和可读性,提高了代码的健壮性和可维护性。这个API包含了java.time包,其中包含了LocalDate、LocalDateTime、LocalTime、ZonedDateTime等各种日期和时间相关的类和方法。这些新的API也提供了流式API设计,可以使用Stream流来实现需要的日期/时间范围。
/**
* 获取日期区间
*
* @param startDate 开始日期
* @param endDate 结束日期
* @return {@link List}<{@link LocalDate}>
*/
public List<LocalDate> getLocalDateRanges(LocalDate startDate, LocalDate endDate) {
return Stream.iterate(startDate, d -> d.plusDays(1))
.limit(ChronoUnit.DAYS.between(startDate, endDate) + 1)
.collect(Collectors.toList());
}
/**
* 获取时间区间
*
* @param startDateTime 开始日期时间
* @param endDateTime 结束日期时间
* @return {@link List}<{@link LocalDateTime}>
*/
public static List<LocalDateTime> getLocalDateTimeRanges(LocalDateTime startDateTime, LocalDateTime endDateTime) {
return Stream.iterate(startDateTime, d -> d.plusDays(1))
.limit(ChronoUnit.DAYS.between(startDateTime.toLocalDate(), endDateTime.toLocalDate()) + 1)
.collect(Collectors.toList());
}
public static void main(String[] args) {
List<LocalDateTime> localDateTimeRanges = getLocalDateTimeRanges(LocalDateTime.of(2023, 5, 1, 0, 0), LocalDateTime.now());
System.out.println(localDateTimeRanges);
}
[2023-05-01T00:00, 2023-05-02T00:00, 2023-05-03T00:00, 2023-05-04T00:00, 2023-05-05T00:00, 2023-05-06T00:00, 2023-05-07T00:00, 2023-05-08T00:00, 2023-05-09T00:00, 2023-05-10T00:00, 2023-05-11T00:00, 2023-05-12T00:00, 2023-05-13T00:00, 2023-05-14T00:00, 2023-05-15T00:00, 2023-05-16T00:00, 2023-05-17T00:00, 2023-05-18T00:00, 2023-05-19T00:00, 2023-05-20T00:00, 2023-05-21T00:00, 2023-05-22T00:00, 2023-05-23T00:00, 2023-05-24T00:00, 2023-05-25T00:00, 2023-05-26T00:00, 2023-05-27T00:00, 2023-05-28T00:00, 2023-05-29T00:00, 2023-05-30T00:00, 2023-05-31T00:00, 2023-06-01T00:00]