解析像“1h 30min"这样的时间字符串 [英] Parsing time strings like "1h 30min"

问题描述

任何人都知道一个 Java 库，它可以将诸如30min"或2h 15min"或2d 15h 30min"之类的时间字符串解析为毫秒(或某种 Duration 对象).Joda-Time 可以做这样的事情吗?

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/用更好的东西替换它.)

(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

您可能需要根据自己的格式稍微调整一下，但可以尝试以下方式:

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，如果您需要使其更灵活，则有一个 appendSuffix 带有 variants 参数.

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

更新:Joda Time 已经添加了 Period.toStandardDuration()，然后您可以使用 getStandardSeconds() 以秒为单位获取 long.

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的一天 24 小时/小时、60 分钟/小时等来自己计算时间戳(在这种情况下，利用DateTimeConstants 类以避免需要幻数.)

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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