Java 8 Timezone conversion when creating java.util.Date

Asked Sep 22 '15 at 00:55

Active Jun 30 '16 at 18:35

Viewed 35 times

My local server is running in the eastern timezone and I would like to save the date a user enters in UTC. So I have a method that does the conversion

 public static Date getDate(LocalDateTime date, int timeZoneOffset) {
     OffsetDateTime dt = date.atOffset(ZoneOffset.ofTotalSeconds(timeZoneOffset));
     System.out.println(dt);
     Instant instant = dt.atZoneSameInstant(ZoneId.of(ZoneOffset.UTC.toString())).toInstant();
     System.out.println(instant);
     Date d = new Date(instant.toEpochMilli());
     System.out.println(d);
     return d;
}

But the print out is this now:

2015-09-21T21:55-04:00 <- this is correct. input time with timezone offset EST

2015-09-22T01:55:00Z <- this is correct. input time in UTC

Mon Sep 21 21:55:00 EDT 2015 <- this is wrong cause it now reverted my UTC time back to EST/EDT time

Why is that? And how can I get the java.util.Date object from the UTC time?

Thanks Chris

edited Jun 20 '20 at 09:12

Community

asked Sep 22 '15 at 00:55

Christopher Rivera

A `Date` doesn't have a timezone. – Sotirios Delimanolis Sep 22 '15 at 00:58
I know that but the print out says EDT and when i check the database its saved in EDT and not UTC – Christopher Rivera Sep 22 '15 at 00:59
Why are you printing out its `toString` value? Use a `SimpleDateFormat` to format it with the appropriate timezone. – Sotirios Delimanolis Sep 22 '15 at 01:00
Well i am trying to figure out why in the db its saved as eastern timezone and not utc – Christopher Rivera Sep 22 '15 at 01:02
Is it stored as a timestamp or as a string? – Sotirios Delimanolis Sep 22 '15 at 01:03
If you are using datetimes, MySQL has no knowledge of time zones. It assumes its system's. – Sotirios Delimanolis Sep 22 '15 at 01:06
System timezone is utc – Christopher Rivera Sep 22 '15 at 01:07
Its a db in the cloud – Christopher Rivera Sep 22 '15 at 01:08

Java 8 Timezone conversion when creating java.util.Date

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