问题

I want to convert a ZonedDateTime to a String in the format of ("dd/MM/yyyy - hh:mm"). I know this is possible in Joda-Time other types, just using their toString("dd/MM/yyyy - hh:mm")....But this doesn't work with ZonedDateTime.toString().

How can I format a `ZonedDateTime` to a `String`?

EDIT:

I tried to print the time in another timezone and the result appears to be the same always:

ZonedDateTime date = ZonedDateTime.now();
ZoneId la = ZoneId.of("America/Los_Angeles");
ZonedDateTime date2 = date.of(date.toLocalDateTime(), la);

// 24/02/2017 - 04:53
System.out.println(DateTimeFormatter.ofPattern("dd/MM/yyyy - hh:mm").format(date));
// same result as the previous one
// 24/02/2017 - 04:53
System.out.println(DateTimeFormatter.ofPattern("dd/MM/yyyy - hh:mm").format(date2));

And I am not in the same timezone as Los Angeles.

EDIT 2:

Found how to change the timezones:

// Change this:
ZonedDateTime date2 = date.of(date.toLocalDateTime(), la); // incorrect!
// To this:
ZonedDateTime date2 = date.withZoneSameInstant(la);

回答1:

You can use java.time.format.DateTimeFormatter. https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html

Here there is an example

ZonedDateTime date = ZonedDateTime.now();

System.out.println(DateTimeFormatter.ofPattern("dd/MM/yyyy - hh:mm").format(date));

回答2:

Many thanks for above. Here it is in scala where localDateTime.now always Zulu/UTC time.

import java.time.format.DateTimeFormatter
import java.time.LocalDateTime
import java.time.ZoneId

val ny = ZoneId.of("America/New_York")
val utc = ZoneId.of("UTC")
val dateTime = LocalDateTime.now.atZone(utc)

val nyTime = DateTimeFormatter.
      ofPattern("yyyy-MMM-dd HH:mm z").
      format(dateTime.withZoneSameInstant(ny))

来源：https://stackoverflow.com/questions/42425393/how-to-format-a-zoneddatetime-to-a-string

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java