How to display date time as local time without the timezone at the end?

问题

EDIT: Due to some seeming confusion, let me clarify. If at all possible I want the solution to be done IN freemarker and not in java.

I have a datetime string that looks like this: 2019-03-12T16:02:00+02:00 I have to show this in a specific format like this: EEEE dd. MMMM yyyy HH:mm However, if I do it like this it shows the time as 14:02 instead of 16:02. It converts the datetime to UTC and then displays it. How do I make it display the hours and minutes as is, just without "utc" at the end? Or any timezone for that matter. Tuesday 12. March 2019 16:02 is the desired output.

I do not know the timezone of the recipient.

Using iso_local_nz gives me the american standard display which is STILL wrong.

Thank you in advance.

I have tried just about all I can think of from here: https://freemarker.apache.org/docs/ref_builtins_date.html#ref_builtin_date_iso.

departureScheduled?datetime.iso?string("EEEE dd. MMMM yyyy HH:mmz")?capitalize

The configuration I use is the following:

config = new Configuration(Configuration.VERSION_2_3_28);
config.setTemplateLoader(new S3TemplateLoader());
config.setDefaultEncoding("UTF-8");
config.setLocalizedLookup(false);
config.setLocale(Locale.forLanguageTag("NO"));
config.setTemplateExceptionHandler(TemplateExceptionHandler.RETHROW_HANDLER);

The string being fed in is the string I provided above.

回答1:

Use the class java.time.OffsetDateTime in order to handle the offset:

public static void main(String[] args) {
    String t = "2019-03-12T16:02:00+02:00";
    OffsetDateTime odt = OffsetDateTime.parse(t);
    System.out.println(odt.format(DateTimeFormatter.ofPattern("EEEE dd. MMMM yyyy HH:mm")));
}

This prints Dienstag 12. März 2019 16:02, translation depends on your system default Locale.

Note that your desired output will not be produced by correct code, because 12th March 2019 was a Tuesday and not a Monday.

回答2:

This is by far not a good solution, but it works for the one case I have where the time I want to show is in the original string before it is parsed.

departureScheduled?keep_before("+")?datetime.iso?string("EEEE dd. MMMM yyyy HH:mm")?capitalize

Note the keep_before("+").

The solution above works by removing whatever is after the + in 2019-03-12T16:02:00+02:00. Then, the datetime parser assumes that the time is in UTC. Thus, I avoid the entire issue by instead using a built in string manipulation function that returns the substring that will not be modified further: 2019-03-12T16:02:00(+00:00). The bracket shows how it is interpreted.

If anybody has a better answer I will mark that as correct, but in a few days time, if no answer has been given, I will mark this as correct for anyone who might have the same problem.

来源：https://stackoverflow.com/questions/56985317/how-to-display-date-time-as-local-time-without-the-timezone-at-the-end

标签

java

datetime

timezone

freemarker