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?
(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.)
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");
note that there is a appendSuffix that takes a variants parameter if you need to make it more flexible.
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.
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.)