問題描述

在上面的代碼中，我想將服務器的時區(qū) (GMT-02:00) 的日期轉(zhuǎn)換為我的設備 (GMT-03:00) 的時區(qū).但我總是有相同的服務器日期.我做錯了什么?

In that code above I want to transform a Date by the TimeZone of Server (GMT-02:00) to TimeZone from my Device (GMT-03:00). But I Always have the same Date of the server. What I doing wrong?

時區(qū) timeZoneServer = TimeZone.getTimeZone(timeZoneServerString);長時間 = new Long(Long.valueOf(timeInMilis));

TimeZone timeZoneServer = TimeZone.getTimeZone(timeZoneServerString); Long time = new Long(Long.valueOf(timeInMilis));

        Calendar calendarDateServer =   Calendar.getInstance(timeZoneServer);
        calendarDateServer.setTimeInMillis(time);
        long miliServer = calendarDateServer.getTimeInMillis();

        TimeZone timeZoneMeu = TimeZone.getDefault();
        Calendar meuCalendario =  new GregorianCalendar();
        meuCalendario.setTimeZone(timeZoneMeu);

        meuCalendario.setTimeInMillis(miliServer);  
        Date transformedDate = meuCalendario.getTime();


        return transformedDate; 

推薦答案

我做錯了什么?

您假設 Date 有一個時區(qū)作為開始.它沒有.Calendar 可以，但 Date 自 Unix 紀元以來只有 毫秒.它不知道日歷系統(tǒng)或時區(qū).這只是一個時間點.

You're assuming that a Date has a time zone to start with. It doesn't. A Calendar does, but a Date is just milliseconds since the Unix epoch. It doesn't know about calendar systems or time zones. It's just a point in time.

不清楚你想對結(jié)果做什么 - 但如果它是格式化顯示的問題，只需使用 SimpleDateFormat 并在 that 上設置時區(qū)而是.

It's not clear what you want to do with the result - but if it's a matter of formatting it for display, just use SimpleDateFormat and set the time zone on that instead.

我還強烈建議您使用 Joda Time 而不是內(nèi)置類型...這是一個更更明智的 API.

I would also strongly recommend that you use Joda Time instead of the built-in types... it's a much more sensible API.

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