Java OffsetDateTime 解析

OffsetDateTime parsing

提问by dmitryvim

Need to parse Date time from format 2016-06-24T13:39:44.687680.

需要从格式解析日期时间2016-06-24T13:39:44.687680。

First step using, tried to parse time without microseconds with line.

使用的第一步，尝试用线解析没有微秒的时间。

System.out.println(OffsetDateTime.parse("2011-12-03T10:15:30", DateTimeFormatter.ISO_LOCAL_DATE_TIME));

Having exception

有异常

Exception in thread "main" java.time.format.DateTimeParseException: Text '2011-12-03T10:15:30' could not be parsed: Unable to obtain OffsetDateTime from TemporalAccessor: {},ISO resolved to 2011-12-03T10:15:30 of type java.time.format.Parsed
    at java.time.format.DateTimeFormatter.createError(DateTimeFormatter.java:1920)
    at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1855)
    at java.time.OffsetDateTime.parse(OffsetDateTime.java:402)
    at timeread.TimeReading.main(TimeReading.java:18)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
Caused by: java.time.DateTimeException: Unable to obtain OffsetDateTime from TemporalAccessor: {},ISO resolved to 2011-12-03T10:15:30 of type java.time.format.Parsed
    at java.time.OffsetDateTime.from(OffsetDateTime.java:370)
    at java.time.format.Parsed.query(Parsed.java:226)
    at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1851)
    ... 7 more
Caused by: java.time.DateTimeException: Unable to obtain ZoneOffset from TemporalAccessor: {},ISO resolved to 2011-12-03T10:15:30 of type java.time.format.Parsed
    at java.time.ZoneOffset.from(ZoneOffset.java:348)
    at java.time.OffsetDateTime.from(OffsetDateTime.java:359)
    ... 9 more

Tried to use DateTimeFormatterwith TimeZone

尝试DateTimeFormatter与TimeZone

System.out.println(OffsetDateTime.parse("2011-12-03T10:15:30", DateTimeFormatter.ISO_LOCAL_DATE_TIME.withZone(ZoneId.systemDefault())));

The similar exception

类似的例外

Exception in thread "main" java.time.format.DateTimeParseException: Text '2011-12-03T10:15:30' could not be parsed: Unable to obtain OffsetDateTime from TemporalAccessor: {InstantSeconds=1322892930},ISO,Europe/Moscow resolved to 2011-12-03T10:15:30 of type java.time.format.Parsed
    at java.time.format.DateTimeFormatter.createError(DateTimeFormatter.java:1920)
    at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1855)
    at java.time.OffsetDateTime.parse(OffsetDateTime.java:402)
    at timeread.TimeReading.main(TimeReading.java:18)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
Caused by: java.time.DateTimeException: Unable to obtain OffsetDateTime from TemporalAccessor: {InstantSeconds=1322892930},ISO,Europe/Moscow resolved to 2011-12-03T10:15:30 of type java.time.format.Parsed
    at java.time.OffsetDateTime.from(OffsetDateTime.java:370)
    at java.time.format.Parsed.query(Parsed.java:226)
    at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1851)
    ... 7 more
Caused by: java.time.DateTimeException: Unable to obtain ZoneOffset from TemporalAccessor: {InstantSeconds=1322892930},ISO,Europe/Moscow resolved to 2011-12-03T10:15:30 of type java.time.format.Parsed
    at java.time.ZoneOffset.from(ZoneOffset.java:348)
    at java.time.OffsetDateTime.from(OffsetDateTime.java:359)
    ... 9 more

采纳答案by Alexey Romanov

OffsetDateTime.parserequires a string containing an offset (+/-hh:mm), which "2011-12-03T10:15:30"doesn't have. Parse it with LocalDateTime.parseand convert the result using OffsetDateTime.of.

OffsetDateTime.parse需要一个包含偏移量 ( +/-hh:mm)的字符串，它"2011-12-03T10:15:30"没有。解析它LocalDateTime.parse并使用 转换结果OffsetDateTime.of。

回答by Wilson

OffsetDateTimeis a representation of a date-time with an offset. To create a OffsetDateTime, you need an zone offset.

OffsetDateTime是具有偏移量的日期时间的表示。要创建OffsetDateTime，您需要一个区域偏移量。

A date-time with an offset from UTC/Greenwich in the ISO-8601 calendar system, such as 2007-12-03T10:15:30+01:00.

在 ISO-8601 日历系统中与 UTC/格林威治有偏移的日期时间，例如 2007-12-03T10:15:30+01:00。

see: https://docs.oracle.com/javase/8/docs/api/java/time/OffsetDateTime.html

见：https: //docs.oracle.com/javase/8/docs/api/java/time/OffsetDateTime.html

For example:

例如：

OffsetDateTime.parse("2011-12-03T10:15:30+01:00", DateTimeFormatter.ISO_OFFSET_DATE_TIME);

If you try to parse a date time with ZoneId, you should use ZonedDateTime.

如果您尝试使用 解析日期时间ZoneId，则应使用ZonedDateTime.

A date-time with a time-zone in the ISO-8601 calendar system, such as 2007-12-03T10:15:30+01:00 Europe/Paris.

ISO-8601 日历系统中带有时区的日期时间，例如 2007-12-03T10:15:30+01:00 Europe/Paris。

see: https://docs.oracle.com/javase/8/docs/api/java/time/ZonedDateTime.html

见：https: //docs.oracle.com/javase/8/docs/api/java/time/ZonedDateTime.html

For example:

例如：

ZonedDateTime.parse("2011-12-03T10:15:30", DateTimeFormatter.ISO_LOCAL_DATE_TIME.withZone(ZoneId.systemDefault()));

If what you need is a datetime without a time-zone in the ISO-8601 calendar system, you can use LocalDateTime.

如果您需要的是 ISO-8601 日历系统中没有时区的日期时间，则可以使用LocalDateTime.

A date-time without a time-zone in the ISO-8601 calendar system, such as 2007-12-03T10:15:30.

ISO-8601 日历系统中没有时区的日期时间，例如 2007-12-03T10:15:30。

see: https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html

见：https: //docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html

For example:

例如：

LocalDateTime.parse("2016-06-24T13:39:44.687680", DateTimeFormatter.ISO_LOCAL_DATE_TIME);