在Java中将秒数转换为HH：MM（无秒） [英] Convert number of seconds into HH:MM (without seconds) in Java

问题描述

我知道您可以使用 DateUtils.formatElapsedTime（秒）将秒数转换为字符串格式为 HH：MM：SS 。但有没有任何实用功能可以让我执行相同的转换，但没有秒？

例如，我想要转换 3665 秒进入 1:01 ，即使它正好是 1:01:05 。换句话说，只需删除秒部分。

强烈会更喜欢指向效用函数（如果存在）的答案而不是一堆家庭滚动算法。

解决方案

根据可用信息，您似乎想要格式化基于持续时间的值。幸运的是，自Java 8以来，现在有了一个新的 java.time API，其中包含持续时间类。 / p>

不幸的是，它没有（至少在最后一次检查时）支持格式化程序。

但是，你可以轻松自己滚动......

  protected static字符串格式（持续时间）{
长时间= duration.toHours（）; 
 long mins = duration.minusHours（hours）.toMinutes（）; 
返回String.format（％02d：％02d，小时，分钟）; 
} 
  

与...类似的东西使用...

  System.out.println（format（Duration.ofSeconds（3665）））; 
  

打印出 01:01 。

现在我知道你更喜欢实用工具方法，但是你不太可能找到适合你每个需求的东西，而且至少给你一个起点。此外，你总是可以提出拉动请求;）

I'm aware that you can use DateUtils.formatElapsedTime(seconds) to convert a number of seconds into a String with the format HH:MM:SS. But are there any utility functions that let me perform the same conversion but without the seconds?

For example, I want to convert 3665 seconds into 1:01, even though it's exactly 1:01:05. In other words, simply dropping the seconds part.

Would strongly prefer an answer that points to a utility function (if one exists) rather than a bunch of home rolled algorithms.

解决方案

Based on the available information, you seem to be wanting to format a duration based value. Lucky for us, since Java 8, there is now a new java.time API which includes a Duration class.

Unfortunately, it doesn't (at least the last time checked) support a formatter for it.

However, you could easily roll your own...

protected static String format(Duration duration) {
    long hours = duration.toHours();
    long mins = duration.minusHours(hours).toMinutes();
    return String.format("%02d:%02d", hours, mins);
}

Which when used with something like...

System.out.println(format(Duration.ofSeconds(3665)));

prints out 01:01.

Now I know you'd "prefer" utility methods, but you're unlikely to find something that fits your "every" need and this at least gives you a starting point. Besides, you could always make a pull request ;)

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