Question

我在几毫秒内从服务器获取时间并尝试在本地时间转换它。我想把它传递给我使用Java的PrettyTime：

PrettyTime p = new PrettyTime();
long millisec = 1522034539973;

    String time = p.format(new Date(millisec));

但结果是从提供的UTC时间到currentTime的相对时间; 我需要的是将millisec转换为本地时间，以毫秒为单位。请帮助！

PS：我正在使用Android

Answer 1

Your code is correct.

If you are indeed directly using the millisecond value that you get from the server, then I suspect that something is coded incorrectly on the server side.

Keep in mind that Dates represent instants in time, and do not contain time zones.

Current "milliseconds" represents, as the documentation says, "the difference, measured in milliseconds, between the current time and midnight, January 1, 1970 UTC(coordinated universal time)" - thus, the offset from the "epoch date" in milliseconds.

Dates don't have timezones until you format them for a particular zone - they just contain this millisecond offset.

So, if you are getting a time other than the one that you expect, either the server is sending the incorrect value, or PrettyTime is inferring the incorrect local timezone when you call format(). PrettyTime appears to use the currently configured Locale, so that's probably not the issue.

I suggest that you test whether the server time is the problem by testing PrettyTime with a locally generated date, something like this:

Date now = new Date();
System.out.println(p.format(now));

If you really want to convince yourself that everything is ok client-side, try this:

Date now = new Date();
long msec = now.getTime();
Date theDate = new Date(msec);
System.out.println(p.format(theDate));

also, to find out what the server is actually sending you, https://currentmillis.com can show you the current time in millis, and convert millis to human-readable formats.

Answer 2

You can try to get time from java.util.Calendar. Here is a example:

Calendar.getInstance(TimeZone.getDefault()).getTimeInMillis()

Also you can get time by specific locale:

Calendar.getInstance(Locale.getDefault()).getTimeInMillis()

如何将miliSec中的时间从UTc转换为miliSec中的本地时间

2 个答案: