OffsetDateTime解析

Question

需要从格式中解析日期时间2016-06-24T13:39:44.687680.

第一步使用,尝试用行解析没有微秒的时间.

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

有例外

Exception in thread "main" java.time.format.DateTimeParseException: Text '2011-12-03T10:15:30' could not be parsed: Unable to obtain OffsetDateTime from TemporalAccessor: {},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

试着DateTimeFormatter用TimeZone

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

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

Answer 1

OffsetDateTime表示具有偏移的日期时间.要创建一个OffsetDateTime,您需要一个区域偏移.

在ISO-8601日历系统中与UTC/Greenwich偏移的日期时间,例如2007-12-03T10:15:30 + 01:00.

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

例如:

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

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

ISO-8601日历系统中具有时区的日期时间,例如2007-12-03T10:15:30 + 01:00欧洲/巴黎.

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

例如:

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

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.

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

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

例如:

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

Answer 2

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