每个人都说使用chronounit。days。between但那只是委托给另一个你可以自己调用的方法。你也可以使用firstDate。直到(secondDate ChronoUnit.DAYS)。

这两种方法的文档实际上都提到了这两种方法，并说使用哪一种更易于阅读。

如果你想要逻辑日历日，请使用java.time.temporal.ChronoUnit中的days .between()方法:

LocalDate dateBefore;
LocalDate dateAfter;
long daysBetween = DAYS.between(dateBefore, dateAfter);

如果你想要24小时的天，(一个duration)，你可以使用duration类:

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

更多信息请参考本文档。

从现在开始计算圣诞节前的天数，试试这个

System.out.println(ChronoUnit.DAYS.between(LocalDate.now(),LocalDate.of(Year.now().getValue(), Month.DECEMBER, 25)));

根据VGR的评论，以下是你可以使用的方法:

ChronoUnit.DAYS.between(firstDate, secondDate)

DAYS.between

你可以使用DAYS。from java.time.temporal.ChronoUnit

e.g.

import java.time.temporal.ChronoUnit;
...

long totalDaysBetween(LocalDate dateBefore, LocalDate dateAfter) {
    return DAYS.between(dateBefore, dateAfter);

import java.time.LocalDate;
import java.time.temporal.ChronoUnit;

LocalDate dateBefore =  LocalDate.of(2020, 05, 20);
LocalDate dateAfter = LocalDate.now();
    
long daysBetween =  ChronoUnit.DAYS.between(dateBefore, dateAfter);
long monthsBetween= ChronoUnit.MONTHS.between(dateBefore, dateAfter);
long yearsBetween= ChronoUnit.YEARS.between(dateBefore, dateAfter);
    
System.out.println(daysBetween);