java - Java 中用于小写 HTTP 值的区域设置

Question

当用户的默认区域设置为土耳其语时，i 会小写为 ı。这是有问题的，因为我想在我的 Accept-Language header 中包含用户的语言和国家/地区代码，但是 OkHttp only allows ASCII header values 。我意识到 Accept-Language 历来不区分大小写，但我必须与不属于我的服务器交互，该服务器需要仅小写的 Accept-Language header 值(value)观。对于像这样的仅机器小写，我应该使用什么区域设置？

Answer 1

我还没有找到任何官方 Java 文档讨论保证机器不变的小写行为。

Apple's documentation谈论 en_US_POSIX:

If you're working with fixed-format dates, you should first set the locale of the date formatter to something appropriate for your fixed format. In most cases the best locale to choose is en_US_POSIX, a locale that's specifically designed to yield US English results regardless of both user and system preferences. en_US_POSIX is also invariant in time (if the US, at some point in the future, changes the way it formats dates, en_US will change to reflect the new behavior, but en_US_POSIX will not), and between platforms (en_US_POSIX works the same on iPhone OS as it does on OS X, and as it does on other platforms).

en_US_POSIX 在 Java 中可用 new Locale("en", "US", "POSIX")。我不知道这有什么保证。