Ruby时区字符串到Java时区

Question

I have a ruby process that writes to DB timezones according to ruby TimeZone Class so at the table I get strings such as:

• "Pacific Time (US & Canada)"
• "Eastern Time (US & Canada)"
• "UTC"
• "Paris"

and so on .. Is there a way (not hard coded map) to read those strings and convert them into java Timezone instance ?

Answer 1

The authoritative source for Rails time zone names to standard TZDB/IANA time zone identifiers is the TimeZone.MAPPING constant in the Rails source code here . If you are able to access this mapping in your Rails code, then you don't need to hardcode anything.

If rather (as it appears in the question comments) that you need to do the translation in your Java code, then you'll have to parse this mapping from the Rails code into something usable in your Java code, and periodically check for changes. Thankfully, the Rails developers don't seem to change this list often.

I don't know of a Java library that already does this for you, but .NET developers can take advantage of my TimeZoneConverter library, which imports this mapping. If you want to write your own code for this, feel free to translate my LoadRailsMapping function from C# to Java.

See also my notes on Rails time zone names at the bottom of the timezone tag wiki .