java - 如何获取两个日期之间相差几周

Question

我是java新手。我有两个日期，例如 Fri Sep 25 00:00:00 IST 2015 以及2015 年 10 月 23 日星期五 00:00:00 IST。我试图获得周差，因此输出将是:-

Sep 25-Oct 1 2015, Oct 2-8 2015, Oct 9-15 2015, Oct 16-21 2015, Oct 22-23 2015

请帮助我!我不想使用 joda 时间

Answer 1

根据http://www.leveluplunch.com/java/examples/number-of-weeks-between-two-dates/ 在 Java 8 中:

public void weeks_between_two_dates_in_java_with_java8 () {

    LocalDate startDate = LocalDate.of(2005, Month.JANUARY, 1);
    LocalDate endDate = LocalDate.of(2006, Month.JANUARY, 1);

    long weeksInYear = ChronoUnit.WEEKS.between(startDate, endDate);

    assertEquals(52, weeksInYear);
}

Java 8 有非常好的日期和时间 API，如您所见 http://www.joda.org/joda-time/

Joda-Time is the de facto standard date and time library for Java. From Java SE 8 onwards, users are asked to migrate to java.time (JSR-310).