ZoneId ID的本地化名称 [英] Localized name of ZoneId's ID

问题描述

我有一个希望用户选择的时区列表.因此，我以为我可以调用java.time.ZoneId.getAvailableZoneIds()并在它们上使用方法getDisplayName.这导致很多重复的条目，例如

I have a list of time zones that I want the user to choose from. So, I thought I can just call java.time.ZoneId.getAvailableZoneIds() and use the method getDisplayName on them. This results in a lot of duplicate entries like

欧洲中部时间

Central European Time

即使我添加了时区偏移量，它们也不是没有道理的.但是，ZoneId的ID可以区分条目，但是我如何对它们进行本地化? ID始终为英文，例如

Even if I add the time zone offset they are not unqiue. However, the ID of a ZoneId distinguishes the entries but how can I localize them? The IDs are always in English like

欧洲/罗马

Europe/Rome

推荐答案

可以通过在ZoneId实例上调用getDisplayName来获得显示名称的本地化版本.这将需要对getAvailableZoneIds():

It's possible to get a localized version of the display name by calling getDisplayName on a ZoneId instance. That would require iteration over the result of getAvailableZoneIds():

ZoneId.getAvailableZoneIds().stream()
        .map(ZoneId::of)
        .map(zid -> zid.getDisplayName(TextStyle.FULL, Locale.GERMAN))
        .distinct()
        .forEach(System.out::println);

请注意TextStyle参数可更改每个区域标题的大小，而.distinct()方法可获取唯一的结果.

Note the TextStyle argument to change the size of each zone's title and the .distinct() method to get unique results.

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