Java在时区之间转换数据/时间不准确
TimeZone.setDefault(TimeZone.getTimeZone("Europe/Moscow"));
System.out.println("Default Timezone: " + TimeZone.getDefault());
String date = "08/04/2016 00:00:00";
SimpleDateFormat simpleDateFormatMoscow = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
Date moscowDt = simpleDateFormatMoscow.parse(date);
System.out.println("Moscow Date: " + simpleDateFormatMoscow.format(moscowDt));
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
simpleDateFormat.setTimeZone(TimeZone.getTimeZone("Asia/Bangkok"));
System.out.println("Bangkok Date: " + simpleDateFormat.format(moscowDt));
Calendar calendar = new GregorianCalendar();
calendar.setTime(moscowDt);
calendar.setTimeZone(TimeZone.getTimeZone("Asia/Bangkok"));
System.out.println("Bangkok Date: " + simpleDateFormat.format(calendar.getTime()));
System.out.println("Test Timezone");
System.out.println(TimeZone.getTimeZone("America/New_York"));
System.out.println(TimeZone.getTimeZone("Europe/Moscow"));
System.out.println(TimeZone.getTimeZone("Asia/Bangkok"));
我试图用这段代码来转换莫斯科和曼谷之间的日期/时间。 结果如下：
默认时区：
sun.util.calendar.ZoneInfo [ID = “欧洲/莫斯科”，偏移= 14400000，dstSavings = 0，useDaylight =假，转换= 78，lastRule =空]
莫斯科日期：08/04/2016 00:00:00
// util日期/时间
曼谷日期：08/04/2016 03:00:00
//约达时间
曼谷日期：08/04/2016 03:00:00
但是，当我使用https://singztechmusings.wordpress.com/2011/06/23/java-timezone-correctionconversion-with-daylight-savings-time-settings/或谷歌时间转换日期/时间是
莫斯科日期：08/04/2016 00:00:00
曼谷日期：08/04/2016 04:00:00
任何人都可以告诉我使用java转换数据/时间的正确方法吗？ 谁能告诉我我做错了什么，为什么结果不准确？
你的Java有错误的时区偏移量：“offset = 14400000”是4小时，但是去年的莫斯科是UTC + 3。
用tzupdater升级你的java。
Java正在使用自己的时区数据，这是与主机操作系统无关的。 如果您没有使用最新版本的Java，原因可能不准确，因为两年前俄罗斯（欧洲/莫斯科）从夏令时切换到永久标准时间
这是首先使用当地时区进行操作的一种方法。
public static void main(String[] args) {
// Create a calendar object and set it time based on the local time zone
Calendar localTime = Calendar.getInstance();
localTime.set(Calendar.HOUR, 17);
localTime.set(Calendar.MINUTE, 15);
localTime.set(Calendar.SECOND, 20);
int hour = localTime.get(Calendar.HOUR);
int minute = localTime.get(Calendar.MINUTE);
int second = localTime.get(Calendar.SECOND);
// Print the local time
System.out.printf("Local time : %02d:%02d:%02dn", hour, minute, second);
// Create a calendar object for representing a Bangkok time zone. Then we set
//the time of the calendar with the value of the local time
Calendar BangkokTime = new GregorianCalendar(TimeZone.getTimeZone("Asia/Bangkok"));
BangkokTime.setTimeInMillis(localTime.getTimeInMillis());
hour = BangkokTime.get(Calendar.HOUR);
minute = BangkokTime.get(Calendar.MINUTE);
second = BangkokTime.get(Calendar.SECOND);
// Print the local time in Bangkok time zone
System.out.printf("Bangkok time: %02d:%02d:%02dn", hour, minute, second);
//Then do the same for the Moscow time zone
Calendar MoscowTime = new GregorianCalendar(TimeZone.getTimeZone("Europe/Moscow"));
MoscowTime.setTimeInMillis(localTime.getTimeInMillis());
hour = MoscowTime.get(Calendar.HOUR);
minute = MoscowTime.get(Calendar.MINUTE);
second = MoscowTime.get(Calendar.SECOND);
// Print the local time in Moscow time zone
System.out.printf("Moscow time: %02d:%02d:%02dn", hour, minute, second);
}