我从应用程序中获取的时间戳已调整为用户的TimeZone。因此,如果用户输入的是美国东部标准时间下午6:12,我将获得格林尼治标准时间2:12。我需要的是一种撤消转换的方法,这样用户输入的时间就是我发送到WebServer请求的时间。这是我的完成方式:
// Get TimeZone of userTimeZone currentTimeZone = sc_.getTimeZone();Calendar currentDt = new GregorianCalendar(currentTimeZone, EN_US_LOCALE);// Get the Offset from GMT taking DST into accountint gmtOffset = currentTimeZone.getOffset( currentDt.get(Calendar.ERA), currentDt.get(Calendar.YEAR), currentDt.get(Calendar.MONTH), currentDt.get(Calendar.DAY_OF_MONTH), currentDt.get(Calendar.DAY_OF_WEEK), currentDt.get(Calendar.MILLISECOND));// convert to hoursgmtOffset = gmtOffset / (60*60*1000);System.out.println("Current User's TimeZone: " + currentTimeZone.getID());System.out.println("Current Offset from GMT (in hrs):" + gmtOffset);// Get TS from User InputTimestamp issuedDate = (Timestamp) getACPValue(inputs_, "issuedDate");System.out.println("TS from ACP: " + issuedDate);// Set TS into CalendarCalendar issueDate = convertTimestampToJavaCalendar(issuedDate);// Adjust for GMT (note the offset negation)issueDate.add(Calendar.HOUR_OF_DAY, -gmtOffset);System.out.println("Calendar Date converted from TS using GMT and US_EN Locale: " + DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT) .format(issueDate.getTime()));代码的输出为:(用户输入时间:5/1/2008 6:12 PM(美国东部标准时间)
当前用户的时区:EST
与GMT的当前偏移量(以小时为单位):-4(通常为-5,DST调整除外)
ACP的TS:2008-05-01 14:12:
00.0日历日期使用GMT和US_EN语言环境从TS转换而来:08/5/1下午6:12(GMT)



