两个Joda LocalDateTimes的差异 [英] Difference of two Joda LocalDateTimes

问题描述

我有2个Joda LocalDateTime 个对象，需要产生一个表示它们之间差异的第3个：

I've got 2 Joda LocalDateTime objects and need to produce a 3rd that represents the difference between them:

LocalDateTime start = getStartLocalDateTime();
LocalDateTime end = getEndLocalDateTime();

LocalDateTime diff = ???

我能想到的唯一方法是精心遍历每个日期/时间字段并执行各自的减去操作：

The only way I can figure is to painstakingly go through each date/time field and performs its respective minus operation:

LocalDateTime diff = end;

diff.minusYears(start.getYear());
diff.minusMonths(start.getMonthOfYear());
diff.minusDays(start.getDayOfMonth());
diff.minusHours(start.getHourOfDay());
diff.minusMinutes(start.getMinuteOfHour());
diff.minusSeconds(start.getSecondsOfMinute());

最终结果只是调用 diff 's toString（）方法并获得有意义的东西。例如，如果 start.toString（）生成2012/02 / 08T15：05：00，并且 end.toString（）生产2012/02 / 08T16：00：00，然后 diff.toString（）将是差异（55分钟），可能看起来像2012/02 / 08T00：55 ：00。

The end result would simply be to call diff's toString() method and get something meaningful. For instance if start.toString() produces 2012/02/08T15:05:00, and end.toString() produces 2012/02/08T16:00:00, then diff.toString() would be the difference (55 minutes) and might look like 2012/02/08T00:55:00.

而且，如果这是一个可怕的滥用 LocalDateTime ，那么我只需要知道如何取两者之间的时差，将差异化为易于阅读（人性化）的格式。

And, if this is a terrible abuse of LocalDateTime, then I just need to know how to take the time difference between the two and put that difference into an easy-to-read (human friendly) format.

提前致谢！

推荐答案

您可以使用org.joda.time.Period类。了解更多关于org.joda.time.Period的信息

You can use org.joda.time.Period class for this. Read more about org.joda.time.Period

示例：

LocalDateTime endOfMonth = now.dayOfMonth().withMaximumValue();
LocalDateTime firstOfMonth = now.dayOfMonth().withMinimumValue();
Period.fieldDifference(firstOfMonth, endOfMonth)

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