本地日期对象之间的天差 [英] Days difference between local date objects

问题描述

LocalDate today=LocalDate.now();

活动日期为: eventDate = LocalDate.of(year，monthOfYear，dayOfMonth); (来自日期选择器对话框)

And the event date is: eventDate=LocalDate.of(year, monthOfYear,dayOfMonth); (from the date picker dialog)

我正在尝试计算它们之间的天差...我发现的最短的东西是:

I'm trying to calculate the days difference between them... The shortest thing I have found is this:

int DaysDifference = Period.between(eventToDisplay.getEventDate(),today).getDays();

第一个对象是"today"，第二个对象是"eventToDisplay.getEventDate()".它对我不起作用，它显示了错误的天数.

While the first object is "today", and the second one is "eventToDisplay.getEventDate()." It didn't work for me, it showed the wrong number of days.

我也试图这样做:

eventToDisplay.getEventDate().compareTo(today)

也没有工作...我还尝试了不使用joda-time的方法，因为我遇到了麻烦，因为我想用日期和时间来做...

Also didn't work... I have also tried to do it without joda-time, because I had troubles with it, because of what I'm trying to do with date and time...

我发现的其他事情又漫长又复杂，我认为也许有一种更好的方法，而无需手动操作.

The other things I have found are long and complicated, and I thought maybe there is a better way, without the joda-time.

我刚刚尝试过:

  Calendar now = Calendar.getInstance();
            Calendar chosenDate=Calendar.getInstance();
            chosenDate.set(eventToDisplay.getEventDate().getYear(),eventToDisplay.getEventDate().getMonth().getValue(),eventToDisplay.getEventDate().getDayOfMonth());
            long def=  chosenDate.getTimeInMillis() - now.getTimeInMillis();
            long DaysDifference  =TimeUnit.MILLISECONDS.toDays(def);

不是为我工作

这对我有用:

 LocalDate today=LocalDate.now();
            Calendar now = Calendar.getInstance();
            now.set(today.getYear(),today.getMonthValue(),today.getDayOfMonth());
            Calendar chosenDate=Calendar.getInstance();
            chosenDate.set(eventToDisplay.getEventDate().getYear(),eventToDisplay.getEventDate().getMonthValue(),eventToDisplay.getEventDate().getDayOfMonth());
            long def=  chosenDate.getTimeInMillis() - now.getTimeInMillis();
            long daysDifference =TimeUnit.MILLISECONDS.toDays(def);

推荐答案

您可以使用以下内容:

    Calendar now = Calendar.getInstance();

    Calendar end=Calendar.getInstance();
    end.set(<year>, <month>, <day>);

    long def=  end.getTimeInMillis() - now.getTimeInMillis();

    long days =TimeUnit.MILLISECONDS.toDays(def);

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