如果你必须只使用标准JDK类，你可以使用这个:

/**
* Converts the given <code>date</code> from the <code>fromTimeZone</code> to the
* <code>toTimeZone</code>.  Since java.util.Date has does not really store time zome
* information, this actually converts the date to the date that it would be in the
* other time zone.
* @param date
* @param fromTimeZone
* @param toTimeZone
* @return
*/
public static Date convertTimeZone(Date date, TimeZone fromTimeZone, TimeZone toTimeZone)
{
long fromTimeZoneOffset = getTimeZoneUTCAndDSTOffset(date, fromTimeZone);
long toTimeZoneOffset = getTimeZoneUTCAndDSTOffset(date, toTimeZone);


return new Date(date.getTime() + (toTimeZoneOffset - fromTimeZoneOffset));
}


/**
* Calculates the offset of the <code>timeZone</code> from UTC, factoring in any
* additional offset due to the time zone being in daylight savings time as of
* the given <code>date</code>.
* @param date
* @param timeZone
* @return
*/
private static long getTimeZoneUTCAndDSTOffset(Date date, TimeZone timeZone)
{
long timeZoneDSTOffset = 0;
if(timeZone.inDaylightTime(date))
{
timeZoneDSTOffset = timeZone.getDSTSavings();
}


return timeZone.getRawOffset() + timeZoneDSTOffset;
}

功劳归于这个帖子。

如果有人需要这个，如果你需要将一个XMLGregorianCalendar时区从UTC转换为你当前的时区，那么你所需要做的就是将时区设置为0，然后调用toGregorianCalendar()——它将保持相同的时区，但Date知道如何将它转换为你的时区，所以你可以从那里获取数据。

XMLGregorianCalendar xmlStartTime = DatatypeFactory.newInstance()
.newXMLGregorianCalendar(
((GregorianCalendar)GregorianCalendar.getInstance());
xmlStartTime.setTimezone(0);
GregorianCalendar startCalendar = xmlStartTime.toGregorianCalendar();
Date startDate = startCalendar.getTime();
XMLGregorianCalendar xmlStartTime = DatatypeFactory.newInstance()
.newXMLGregorianCalendar(startCalendar);
xmlStartTime.setHour(startDate.getHours());
xmlStartTime.setDay(startDate.getDate());
xmlStartTime.setMinute(startDate.getMinutes());
xmlStartTime.setMonth(startDate.getMonth()+1);
xmlStartTime.setTimezone(-startDate.getTimezoneOffset());
xmlStartTime.setSecond(startDate.getSeconds());
xmlStartTime.setYear(startDate.getYear() + 1900);
System.out.println(xmlStartTime.toString());

结果:

2015-08-26T12:02:27.183Z
2015-08-26T14:02:27.183+02:00

将日期转换为字符串，并使用SimpleDateFormat。

    SimpleDateFormat readFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
readFormat.setTimeZone(TimeZone.getTimeZone("GMT" + timezoneOffset));
String dateStr = readFormat.format(date);
SimpleDateFormat writeFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
Date date = writeFormat.parse(dateStr);

这段代码在我正在开发的应用程序中很有帮助:

    Instant date = null;
Date sdf = null;
String formatTemplate = "EEE MMM dd yyyy HH:mm:ss";
try {
SimpleDateFormat isoFormat = new SimpleDateFormat("EEE MMM dd yyyy HH:mm:ss");
isoFormat.setTimeZone(TimeZone.getTimeZone(ZoneId.of("US/Pacific")));
sdf = isoFormat.parse(timeAtWhichToMakeAvailable);
date = sdf.toInstant();


} catch (Exception e) {
System.out.println("did not parse: " + timeAtWhichToMakeAvailable);
}


LOGGER.info("timeAtWhichToMakeAvailable: " + timeAtWhichToMakeAvailable);
LOGGER.info("sdf: " + sdf);
LOGGER.info("parsed to: " + date);

在这里你可以得到日期像"2020-03-11T20:16:17"返回"11/Mar/2020 - 20:16"

 private String transformLocalDateTimeBrazillianUTC(String dateJson) throws  ParseException {
String localDateTimeFormat = "yyyy-MM-dd'T'HH:mm:ss";
SimpleDateFormat formatInput = new SimpleDateFormat(localDateTimeFormat);


//Here is will set the time zone
formatInput.setTimeZone(TimeZone.getTimeZone("UTC-03"));


String brazilianFormat = "dd/MMM/yyyy - HH:mm";
SimpleDateFormat formatOutput = new SimpleDateFormat(brazilianFormat);
Date date = formatInput.parse(dateJson);
return formatOutput.format(date);
}

这个答案可能是最短的，它只使用Date类:

long current = new Date().getTime() + 3_600_000;              //e.g. your JVM time zone +1 hour (3600000 milliseconds)
System.out.printf("%1$td.%1$tm.%1$tY %1$tH:%1$tM\n", current);//european time format

但是，如果可以的话，用更现代的方式来做同样的事情。

package org.example;


import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;


public class time {
public static void main(String[] args) {
SimpleDateFormat sdf=new SimpleDateFormat("yyyy/MM/dd HH:mm");
sdf.setTimeZone(TimeZone.getTimeZone("Asia/Jakarta"));
Date date=new Date();
sdf.format(date);
System.out.println(sdf.format(date));
}
}