Java Calendar:获取时区时间

2022-01-11 00:00:00 date calendar java

以下作品(显示UTC时间)

The following works (shows UTC time)

TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
System.out.println(new Date());

但这不(显示当地时间)

but this doesn't (shows local time)

    Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
    System.out.println(cal.getTime());
    System.out.println(new Date());

有什么简单的东西我错过了吗?

Is there something simple, that I'm missing?

推荐答案

您正在打印 Date.toString()，总是使用默认时区.

You're printing out the result of Date.toString(), which always uses the default time zone.

我建议你使用 DateFormat 相反，它更适合格式化日期.Date.toString 实际上只适用于调试 - 它无法控制格式.

I suggest you use DateFormat instead, which is better suited for formatting dates. Date.toString is really only suitable for debugging - it provides no control over the format.

或者，使用 Joda Time 进行所有日期和时间操作 - 这是一个更好的 API 开始:)

Alternatively, use Joda Time for all your date and time operations - it's a much better API to start with :)

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