Question

我想从startDate和endDate中找出它多少天。从我的json响应中，我可以在String中找回它们：

String startDate = "Fri, 10 Jan 2015 23:10:04 +0000";
String endDate = "Mon, 26 Jan 2015 11:26:04 +0000";

我如何使用joda计算并让我回到正确的天数（因此：numOfDays = endDate - startDate）??

public int getNumberOfDays(String startDate, String endDate) {
    String pattern = "EEE, dd MMM yyyy HH:mm:ss +xxxx";
    .....

    // quick test on startDate
    DateTime dateTime = DateTime.parse(startDate, DateTimeFormat.forPattern(pattern));
    System.out.println("The day should be 10 but it yields 9 --> " + dateTime.getDayOfMonth());

}

Answer 1

使用天类Joda资料库

Days days=Days.daysBetween(startDate.toLocalDate(), endDate.toLocalDate()).getDays();
int noOfDays=days.getDays();

作为替代方案，我们也可以使用 Java 8 日期和时间API

public void days_between_two_dates_in_java_with_java8 () {

    LocalDate startDate = LocalDate.now().minusDays(1);
    LocalDate endDate = LocalDate.now();

    long days = Period.between(startDate, endDate).getDays();


    // or 

    long days2 = ChronoUnit.DAYS.between(startDate, endDate);

}

使用joda查找从开始到结束的天数差异？

1 个答案: