Freemarker print dates in different time zones
I am using Freemarker version 2.3.20.
I have a data structure that contains two dates, one in local time and one in utc.
// 2017-07-17 18:30 UTC
ZonedDateTime utcTime = ZonedDateTime.of(2017, 7, 17, 18, 30, 0, 0, ZoneId.of("UTC"));
// 2017-07-17 20:30 (+02:00)
ZonedDateTime localTime = utcTime.withZoneSameInstant(ZoneId.of("Europe/Berlin"));
Freemarker can only handle java.util.Date
, so I am passing in dates.
Map<String, Object> mapping = new HashMap<String, Object>();
mapping.put("departureTimeLocal", Date.from(localTime.toInstant()));
mapping.put("departureTimeUtc", Date.from(utcTime.toInstant()));
In my template, I would like to write something like:
Departure (local): ${departureTimeLocal?string['HH:mm']}
Departure (UTC) : ${departureTimeUtc?string['HH:mm']}
And as a result, I would like to see:
Departure (local): 20:30
Departure (UTC) : 18:30
I am currently seeing:
Departure (local): 20:30
Departure (UTC) : 20:30 <#-- timestamp interpreted in local time -->
I have also tried something like:
Departure (converted): ${(departureTimeLocal?string['yyyy-MM-dd HH:mm'] + ' UTC')?datetime['yyyy-MM-dd HH:mm z']?string['HH:mm']}
--> Departure (converted): 22:30
What would be the best way to archive something like this?
Yes, I know: java.util.Date
it doesn't actually have a timezone (print only) and localTime/utcTime.toInstant()
both maps refer to the same moments at zulu time.
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With freemarker 2.3.20 you can use iso inline date:
${departureTimeUtc?time?iso_utc_m_nz}
This built-in module has been deprecated as of freemarker 2.3.21 and replaced with:
${departureTimeUtc?time?string.iso_m_nz_u}
Meaning iso_m_nz_u
:
-
iso
: use ISO 8601: 2004 format -
m
: accurate to the minute -
nz
: no time zone -
u
: use UTC instead of the default timezone.
A complete list of options can be found here .
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