两个time.Time对象之间的时差 [英] Difference between two time.Time objects
问题描述
Go的新功能。问题可能是基本的。
Very new to the 'Go'. Question might be basic one.
我有两个time.Time对象，我想获取两者之间在小时/分钟/秒方面的差异。可以说：
I have two time.Time objects and I want to get the difference between the two in terms of hours/minutes/seconds. Lets say:
t1 = 2016-09-09 19:09:16 +0530 IST
t2 = 2016-09-09 19:09:16 +0530 IST
在上述情况下，由于差异为0。它应该给我00:00:00。考虑另一种情况：
In above case, since the difference is 0. It should give me 00:00:00. Consider another case:
t1 = 2016-09-14 14:12:48 +0530 IST
t2 = 2016-09-14 14:18:29 +0530 IST
在这种情况下，差值为00： 05:41。我查看了 https://godoc.org/time ，但无法从中获得任何好处。
In this case, difference would be 00:05:41. I looked at the https://godoc.org/time but could not make anything out of it.
推荐答案
您可以使用 Time.Sub（） 来获取2个 time.Time 值，结果将是 time.Duration 。
You may use Time.Sub() to get the difference between the 2 time.Time values, result will be a value of time.Duration.
打印时， time.Duration 会智能格式化自身：
When printed, a time.Duration formats itself "intelligently":
t1 := time.Now()
t2 := t1.Add(time.Second * 341)
fmt.Println(t1)
fmt.Println(t2)
diff := t2.Sub(t1)
fmt.Println(diff)
输出：
2009-11-10 23:00:00 +0000 UTC
2009-11-10 23:05:41 +0000 UTC
5m41s
如果你想t时间格式 HH：mm：ss ，您可以构造 time.Time 值并使用其 Time.Format（） 方法：
If you want the time format HH:mm:ss, you may constuct a time.Time value and use its Time.Format() method like this:
out := time.Time{}.Add(diff)
fmt.Println(out.Format("15:04:05"))
输出：
00:05:41
尝试去游乐场上的示例。
当然，这仅在时差少于一天的情况下有效。如果差异可能更大，那就另当别论了。结果必须包括几天，几个月和几年。复杂性显着增加。有关详细信息，请参见此问题：
Of course this will only work if the time difference is less than a day. If the difference may be bigger, then it's another story. The result must include days, months and years. Complexity increases significnatly. See this question for details:
此处显示的解决方案通过显示带有签名的函数来解决此问题：
The solution presented there solves this issue by showing a function with signature:
func diff(a, b time.Time) (year, month, day, hour, min, sec int)
即使您的时间在24小时以内（在这种情况下，年），您也可以使用它，月和天将为 0 ）。
You may use that even if your times are within 24 hours (in which case year, month and day will be 0).
这篇关于两个time.Time对象之间的时差的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
