How to convert time in YYYY-MM-DDTHH:mm:ss.SSSZ format to default timezone?
RFC 3339 describes a specific ISO 8601 'profile' for date/time representation.
If using 3rd-party open-source libraries is an option, take a look at Joda-Time's ISODateTimeFormat
utility class.
Otherwise, if you need to roll out your own code it's not enough to use a SimpleDateFormat
because of the way ISO 8601/RFC 3339 represents timezone information.
If all you need to parse is in 'Z' (Zulu or UTC), then it's relatively simple:
String input = "2011-08-11T01:23:45.678Z";
TimeZone utc = TimeZone.getTimeZone("UTC");
SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
f.setTimeZone(utc);
GregorianCalendar cal = new GregorianCalendar(utc);
cal.setTime(f.parse(input));
System.out.println(cal.getTime());
Should print out "2011-08-11T01:23:45.678Z" in your local time zone.
If you need to handle arbitrary timezones in RFC 3339 then you'll need to extend the above to parse out the timezone designator and retrieve the corresponding Java TimeZone
instance. That shouldn't be too hard if it's just whole hours +/- GMT, but in case of non-standard offsets you may have to create your own SimpleTimeZone
instance.
sunil
I am Mobile Developer and have developed on J2ME, Blackberry and Android.
Updated on August 11, 2020Comments
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sunil over 3 years
The time that I am getting is in the format "2011-07-31T08:16:37.733Z". Actually the Z should be the timezone and then that time is converted to local timezone. How do I actually convert this time to default timezone now.
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sunil over 12 yearsI have mentioned the format that the date is coming. That date is in RFC3339 format. If you have any idea of how to parse RFC3339 dates then please let me know.
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atzu over 12 yearsEdited above, was it helpful? This might help: cokere.com/RFC3339Date.txt