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));
   }
}

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;
}

功劳归于这篇文章。

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));
   }
}

请注意，java.util.Date对象本身不包含任何时区信息—您不能在Date对象上设置时区。Date对象所包含的唯一内容是从“epoch”开始的毫秒数——1970年1月1日00:00:00 UTC。

如ZZ Coder所示，您可以在DateFormat对象上设置时区，以告诉它您希望在哪个时区显示日期和时间。

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);

在这里，您可以获得日期如“2020-03-11T20:16:17”并返回“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);
}