Handle DST in UTC time using Groovy

Question

I am trying to convert milliseconds time to date-time (yyyy-MM-dd'T'HH:mm:ss'Z') format in UTC.

def StartDateTimeNew = testCase.testSuite.project.getPropertyValue("StartDateTime").toLong()
def Startdate = new Date(StartDateTimeNew).format("yyyy-MM-dd'T'HH:mm:ss'Z'", TimeZone.getTimeZone('UTC'));
log.info Startdate

'StartDateTime' value is '1503478800000'

The output i am getting is :-

Tue Aug 22 18:13:59 IST 2017:INFO:2017-08-23T09:00:00Z

But i want to handle DST in the output :-

Tue Aug 22 18:13:59 IST 2017:INFO:2017-08-23T10:00:00Z

How about this - https://stackoverflow.com/questions/10545960/how-to-tackle-daylight-savings-using-timezone-in-java — Rao, Aug 22 '17 at 13:31
How to know the timezone name? like for EST we have 'America/New_York', What name used for UTC? — rAJ, Aug 23 '17 at 07:12
Date format is different, not tried. I want some simple change in my existing code. The link you provided is good but cannot find the UTC timezone name. — rAJ, Aug 23 '17 at 07:25
Raj, how are you testing it now? there is no `DST` active now? — Rao, Aug 23 '17 at 09:50
The time i receive in Output is 1 hr less than actual UK time. — rAJ, Aug 23 '17 at 13:47
This works `def Startdate = new Date(StartDateTimeNew).format("yyyy-MM-dd'T'HH:mm:ss'Z'", TimeZone.getTimeZone('GMT+1'));` — rAJ, Aug 24 '17 at 12:24

score 0 · Answer 1 · answered Aug 22 '17 at 13:42

If you're on Java 8, I'd highly recommend using its new java.time API instead of java.util.Date

import java.time.*
import java.time.format.DateTimeFormatter

// this converts the millis to the ZonedDateTime representation
def currentZone = ZoneId.systemDefault() // or whatever the appropriate zone is
def startdate = ZonedDateTime.ofInstant(Instant.ofEpochMilli(startDateTimeLong), currentZone)

// to format in UTC
def fmt = startdate.format(DateTimeFormatter.ISO_OFFSET_DATE_TIME.withZone(ZoneId.of('UTC')))

Handle DST in UTC time using Groovy

1 Answers1