如何将ISO 8601格式的DateTime转换为Java中的另一个时区? [英] How to convert ISO 8601 formatted DateTime to another time zone in Java?
问题描述
我当前的日期:
日期utc: 2018-06-06T16:30:00Z (采用UTC的ISO 8601)
或
日期ISO: 2018-06-06T11:30:00-05:00 (ISO 8601)
或
日期时代: 1528302600000 (Epoch/Unix时间戳)
My current date:
Date utc: 2018-06-06T16:30:00Z (ISO 8601 in UTC)
OR
Date iso: 2018-06-06T11:30:00-05:00 (ISO 8601)
OR
Date epoch: 1528302600000 (Epoch/Unix Timestamp)
我希望将上面的DateTime转换为其他时区(例如GMT + 5:30).我不确定从以上三种时间中会收到哪种时间格式.那么,我可以使用一个通用方法将上面的代码转换为另一个时区,并返回Java 8中的java.util.Date吗?
I wish to convert the above DateTime to some another time zone areas (like GMT+5:30). And I'm not sure which time format I'll receive from above three. So can I've a generic method which can convert above to some another time zone returning java.util.Date in Java 8?
我做了这样的事情,但是没有成功
I did Something like this, But it didn't worked out
public Date convertDateToLocalTZ(Date iso8601, ZoneId toZoneId) {
Date dateTime = null;
if (iso8601 != null && toZoneId != null) {
Instant instant = iso8601.toInstant();
LocalDateTime localDateTime = instant.atZone(toZoneId).toLocalDateTime();
dateTime = Date.from(localDateTime.atZone(toZoneId).toInstant());
return dateTime;
}
return dateTime;
}
推荐答案
Since question is tagged java-8
use java.time
API.
更新:对于添加了2018-06-06T11:30:00-05:00
的问题的第4版.
UPDATE: For version 4 of question where 2018-06-06T11:30:00-05:00
was added.
要解析1528302600000
,请将其解析为long
,然后使用
To parse 1528302600000
, you parse it into a long
, then use Instant.ofEpochMilli()
.
要解析类似2018-06-06T11:30:00-05:00
的格式,可以使用 ZonedDateTime
.两者都可以解析2018-06-06T16:30:00Z
.
To parse a format like 2018-06-06T11:30:00-05:00
, you can using OffsetDateTime
or ZonedDateTime
. Both can also parse 2018-06-06T16:30:00Z
.
要将时区专门更改为特定的偏移量(例如GMT+5:30
),请使用 ZoneOffset
,例如 ZoneOffset.of("+05:30")
或 ZoneId
,例如 ZoneId.of("GMT+05:30")
.
注释1: GMT+5:30
无效.
注释2:要更改区域的时区,以纪念夏令时,请使用例如ZoneId.of("Asia/Kolkata")
.
To change the time zone specifically to a particular offset like GMT+5:30
, use ZoneOffset
, e.g. ZoneOffset.of("+05:30")
, or ZoneId
, e.g. ZoneId.of("GMT+05:30")
.
Note 1: GMT+5:30
is not valid.
Note 2: To change to the time zone of a region, honoring Daylight Savings Time, use e.g. ZoneId.of("Asia/Kolkata")
.
要解析所有3种输入格式,甚至支持像2018-06-06T11:30-05:00[America/Chicago]
这样的扩展格式,请使用ZonedDateTime
,并对历元数进行特殊处理.
To parse all 3 input formats, and even support the extended format like 2018-06-06T11:30-05:00[America/Chicago]
, use ZonedDateTime
, with special handling for the epoch number.
public static ZonedDateTime parseToZone(String text, ZoneId zone) {
if (text.indexOf('-') == -1)
return Instant.ofEpochMilli(Long.parseLong(text)).atZone(zone);
return ZonedDateTime.parse(text).withZoneSameInstant(zone);
}
The caller can then decide if only the offset, not the full time zone, should be used, by converting it to OffsetDateTime
using toOffsetDateTime()
.
测试
ZoneId india = ZoneId.of("Asia/Kolkata");
System.out.println(parseToZone("2018-06-06T16:30:00Z", india));
System.out.println(parseToZone("2018-06-06T11:30:00-05:00", india));
System.out.println(parseToZone("1528302600000", india));
System.out.println(parseToZone("1528302600000", india).toOffsetDateTime());
输出
2018-06-06T22:00+05:30[Asia/Kolkata]
2018-06-06T22:00+05:30[Asia/Kolkata]
2018-06-06T22:00+05:30[Asia/Kolkata]
2018-06-06T22:00+05:30
原始答案
使用 ofEpochMilli()
1528302600000
的a>方法.
然后使用 atZone()
转换为您所需的时区.
Use the parse()
method with 2018-06-06T16:30:00Z
.
Use the ofEpochMilli()
method with 1528302600000
.
Then use atZone()
to convert to your desired time zone.
演示
Instant instant1 = Instant.parse("2018-06-06T16:30:00Z");
Instant instant2 = Instant.ofEpochMilli(1528302600000L);
ZoneId india = ZoneId.of("Asia/Kolkata");
ZonedDateTime date1 = instant1.atZone(india);
ZonedDateTime date2 = instant2.atZone(india);
System.out.println(instant1);
System.out.println(instant2);
System.out.println(date1);
System.out.println(date2);
输出
2018-06-06T16:30:00Z
2018-06-06T16:30:00Z
2018-06-06T22:00+05:30[Asia/Kolkata]
2018-06-06T22:00+05:30[Asia/Kolkata]
To print the result in human format, use a DateTimeFormatter
.
DateTimeFormatter indiaFormatter = DateTimeFormatter.ofLocalizedDateTime(FormatStyle.LONG)
.withLocale(Locale.forLanguageTag("en-IN"));
DateTimeFormatter hindiFormatter = DateTimeFormatter.ofLocalizedDateTime(FormatStyle.LONG)
.withLocale(Locale.forLanguageTag("hi-IN"));
System.out.println(date1.format(indiaFormatter));
System.out.println(date1.format(hindiFormatter));
输出
6 June 2018 at 10:00:00 PM IST
6 जून 2018 को 10:00:00 अपराह्न IST
这篇关于如何将ISO 8601格式的DateTime转换为Java中的另一个时区?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!