JodaTime向下舍入到最近的四分之一小时 [英] JodaTime rounding down to nearest quarter of hour

问题描述

如果时间是10:36，我想将时间四舍五入到10:30.如果时间是1050，我想将时间四舍五入到10:45.等等...我不确定该怎么做.有什么想法吗?

If the time is 10:36 I would like to round the time down to 10:30. If the time is 1050 I would like to round the time down to 10:45. etc... I am not sure how to do this. Any ideas?

推荐答案

如何?

public static LocalTime roundToQuarterHour(LocalTime time) {
  int oldMinute = time.getMinuteOfHour();
  int newMinute = 15 * (int) Math.round(oldMinute / 15.0);
  return time.plusMinutes(newMinute - oldMinute);
}

(由于存在withMinuteOfHour方法，因此似乎有些复杂，但是请记住，我们可能会四舍五入到60，并且withMinuteOfHour(60)是无效的.)

(It may seem slightly overcomplicated since there's a withMinuteOfHour method, but keep in mind that we might round to 60, and withMinuteOfHour(60) is invalid.)

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