spring boot convert datetime with timezone to '0' timezone in server

Question

I want to store all date time and when a user wants to get information. The server must to return data with datetime and 3rd party devices (like Android , IOS, Web apps) should convert that datetime for specific timezone. The basic goal is store all date timezone with "0" timezone

Answer 1

You can use Java8 ZonedDateTime to get time in UTC. My assumption is 0 timezone means UTC

ZonedDateTime.now(ZoneOffset.UTC);// This will give current time in UTC

To convert ZontedDateTime , You can put GMT,US/Central etc in the config file

public static ZonedDateTime getDateinTimeZone(String timeZone,String dateInSting )
{
    return ZonedDateTime.parse(dateInSting).now(ZoneId.of(timeZone));
}