在java中将本地时区转换为GMT [英] Conversion of local time zone to GMT in java

问题描述

我尝试将当地时区的转换日期转换为GMT，我做了类似的事情

Am trying convert date which is in local time zone to GMT, i did some thing like this

SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
        sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
        String gmtStrDate = sdf.format(Calendar.getInstance().getTime());

        System.out.println("GMT 1"+gmtStrDate);

        Date gmtDate = sdf.parse(gmtStrDate);

        System.out.println("GMT 2"+gmtDate);

我在GMT tz获得GMT 1 o / p但是GMT 2 o / p再次变为当地时区...可以告诉我为什么？

i am getting GMT 1 o/p in GMT tz but GMT 2 o/p is again changing to local time zone...Can any tel me why?

要获得格林尼治标准时间的GMT 2 o / p，我确实喜欢这样：

to get the GMT 2 o/p in GMT i did like this :

日历日历= Calendar.getInstance（TimeZone.getTimeZone（GMT））;
calendar.setTime（gmtDate）;

Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT")); calendar.setTime(gmtDate);

        System.out.println("GMT 3 = "+calendar.getTime());

但GMT 3o / p仍在本地tz。请在此建议。

but still GMT 3o/p am getting in local tz. Please suggest on this.

推荐答案

import java.util.*;
import java.text.*;
public class CurrentTimeToGMT{
  public static void main(String args[]){
    Date date = new Date();
    DateFormat gmtFormat = new SimpleDateFormat();
    TimeZone gmtTime = TimeZone.getTimeZone("GMT");
    gmtFormat.setTimeZone(gmtTime);
    System.out.println("Current Time: "+date);
    System.out.println("GMT Time: " + gmtFormat.format(date));

  }
}

输出

Current Time: Wed Mar 10 11:21:18 IST 2010

GMT Time: 3/10/10 5:51 AM

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