如何获得不同时区的当地时间？

我想使用Java代码获取不同时区的本地时间。 根据传递给函数的时区，我需要该时区的本地时间。 怎么做到这一点？

Answer 1

java.util.TimeZone tz = java.util.TimeZone.getTimeZone("GMT+1"); java.util.Calendar c = java.util.Calendar.getInstance(tz); System.out.println(c.get(java.util.Calendar.HOUR_OF_DAY)+":"+c.get(java.util.Calendar.MINUTE)+":"+c.get(java.util.Calendar.SECOND)); 

Answer 2

我建议您查看Joda Time，它是标准Java日期和时间API的替代方案（但非常受欢迎）：

http://joda-time.sourceforge.net/index.html

使用Joda Time，我认为这就是你的意思：

 import org.joda.time.DateTime; import org.joda.time.DateTimeZone; public class TimeZoneDemo { public static void main(String[] args) { DateTime now = new DateTime(System.currentTimeMillis(), DateTimeZone.forID("UTC")); System.out.println("Current time is: " + now); } } 

您只需要知道相关时区的标准ID，例如UTC。

Answer 3

Java 1.8在java.time包中为您提供了一些新类：

 package learning.java8; import java.time.Instant; import java.time.ZoneId; import java.time.ZonedDateTime; import java.time.format.DateTimeFormatter; import org.junit.Test; public class JavaTimeLT { @Test public void zonedDataTimeExample() { final ZoneId zoneId = ZoneId.of("Europe/Zurich"); final ZonedDateTime zonedDateTime = ZonedDateTime.ofInstant(Instant.now(), zoneId); System.out.println(zonedDateTime.format(DateTimeFormatter.ISO_ZONED_DATE_TIME)); } } 

Answer 4

我编写了以下程序以获得所有可用时区的时间，看看这是否有帮助……

 String[] zoneIds = TimeZone.getAvailableIDs(); for (int i = 0; i < zoneIds.length; i++) { TimeZone tz = TimeZone.getTimeZone(zoneIds[i]); System.out.print(tz.getID() + " " + tz.getDisplayName()); Calendar calTZ = new GregorianCalendar(tz); calTZ.setTimeInMillis(new Date().getTime()); Calendar cal = Calendar.getInstance(); cal.set(Calendar.YEAR, calTZ.get(Calendar.YEAR)); cal.set(Calendar.MONTH, calTZ.get(Calendar.MONTH)); cal.set(Calendar.DAY_OF_MONTH, calTZ.get(Calendar.DAY_OF_MONTH)); cal.set(Calendar.HOUR_OF_DAY, calTZ.get(Calendar.HOUR_OF_DAY)); cal.set(Calendar.MINUTE, calTZ.get(Calendar.MINUTE)); cal.set(Calendar.SECOND, calTZ.get(Calendar.SECOND)); cal.set(Calendar.MILLISECOND, calTZ.get(Calendar.MILLISECOND)); System.out.println( " "+cal.getTime()); 

Answer 5

检查一下。 希望它会有所帮助。

  TimeZone tz = TimeZone.getTimeZone("Asia/Shanghai"); Calendar cal = Calendar.getInstance(); int LocalOffSethrs = (int) ((cal.getTimeZone().getRawOffset()) *(2.77777778 /10000000)); int ChinaOffSethrs = (int) ((tz.getRawOffset()) *(2.77777778 /10000000)); TimeZone tz1 = TimeZone.getTimeZone("US/Central"); String ss =cal.getTimeZone().getDisplayName(); System.out.println("Local Time Zone : " + ss); System.out.println("China Time : " + tz.getRawOffset()); System.out.println("Local Offset Time from GMT: " + LocalOffSethrs); System.out.println("China Offset Time from GMT: " + ChinaOffSethrs); cal.add(Calendar.MILLISECOND,-(cal.getTimeZone().getRawOffset())); //cal.add(Calendar.HOUR,- LocalOffSethrs); cal.add(Calendar.MILLISECOND, tz.getRawOffset()); Date dt = new Date(cal.getTimeInMillis()); System.out.println("After adjusting offset Acctual China Time :" + dt); 

Answer 6

 import java.text.SimpleDateFormat; import java.util.GregorianCalendar; SimpleDateFormat dateFormat = new SimpleDateFormat(); dateFormat.setTimeZone(TimeZone.getTimeZone("Asia/Seoul")); GregorianCalendar cal = Calendar.getInstance(); cal.add(Calendar.DATE, 0); System.out.println(dateFormat.format( cal.getTime())); 

Answer 7

在Java 8中，您可以使用ZonedDateTime.now(ZoneId zone)方法：

 ZonedDateTime zonedDateTime = ZonedDateTime.now(ZoneId.of("Asia/Tokyo")); LocalTime localTime = zonedDateTime.toLocalTime(); System.out.println(localTime);