解析时间字符串，如“1小时30分钟”， [英] Parsing time strings like "1h 30min"

问题描述

任何人都知道Java库可以解析时间字符串，例如30min或2h 15min或2d 15h 30min，作为毫秒（或某种Duration对象）。 Joda-Time可以这样做吗？

Anyone know of a Java library that can parse time strings such as "30min" or "2h 15min" or "2d 15h 30min" as milliseconds (or some kind of Duration object). Can Joda-Time do something like this?

（我有一个丑陋的长方法来维护这种解析，并希望摆脱它/用某些东西替换它那样做得更好。）

(I have an ugly long method to maintain that does such parsing and would like to get rid of it / replace it with something that does a better job.)

推荐答案

你可能不得不为自己的格式调整一下，但尝试一下沿着这些方向：

You'll probably have to tweak this a bit for your own format, but try something along these lines:

PeriodFormatter formatter = new PeriodFormatterBuilder()
    .appendDays().appendSuffix("d ")
    .appendHours().appendSuffix("h ")
    .appendMinutes().appendSuffix("min")
    .toFormatter();

Period p = formatter.parsePeriod("2d 5h 30min");

请注意，需要 appendSuffix 一个 variants 参数，如果你需要让它更灵活。

note that there is a appendSuffix that takes a variants parameter if you need to make it more flexible.

更新：Joda时间已经添加 Period.toStandardDuration（） ，从那里你可以使用 getStandardSeconds（） 以的形式获取经过的时间（以秒为单位）很长。

Update: Joda Time has since added Period.toStandardDuration(), and from there you can use getStandardSeconds() to get the elapsed time in seconds as a long.

如果您使用的是没有这些方法的旧版本，您仍然可以通过假设标准24小时/小时来自行计算时间戳一天，60分钟/小时等等（在这种情况下，利用 DateTimeConstants 类中的常量来避免需要幻数。）

If you're using an older version without these methods you can still calculate a timestamp yourself by assuming the standard 24/hr in a day, 60min/hr, etc. (In this case, take advantage of the constants in the DateTimeConstants class to avoid the need for magic numbers.)

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