java.time.format.DateTimeParseException at LocalDateTime.parse
java.time.format.DateTimeParseException at LocalDateTime.parse
提问于 2018-03-02 09:30:03
为什么下面的代码：
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
public class TestProject {
public static void main(String[] args) {
String dateString = "2018-03-01T14:52:48Z";
DateTimeFormatter dtf = DateTimeFormatter.ISO_INSTANT;
LocalDateTime localDateTime = LocalDateTime.parse(dateString, dtf);
}
}投掷：
Exception in thread "main" java.time.format.DateTimeParseException: Text '2018-03-01T14:52:48Z' could not be parsed: Unable to obtain LocalDateTime from TemporalAccessor: {NanoOfSecond=0, InstantSeconds=1519915968, MilliOfSecond=0, MicroOfSecond=0},ISO of type java.time.format.Parsed
at java.base/java.time.format.DateTimeFormatter.createError(DateTimeFormatter.java:1959)
at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1894)
at java.base/java.time.LocalDateTime.parse(LocalDateTime.java:492)
at org.bdshadow.TestProject.main(TestProject.java:11)
Caused by: java.time.DateTimeException: Unable to obtain LocalDateTime from TemporalAccessor: {NanoOfSecond=0, InstantSeconds=1519915968, MilliOfSecond=0, MicroOfSecond=0},ISO of type java.time.format.Parsed
at java.base/java.time.LocalDateTime.from(LocalDateTime.java:461)
at java.base/java.time.format.Parsed.query(Parsed.java:235)
at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1890)
... 2 more
Caused by: java.time.DateTimeException: Unable to obtain LocalDate from TemporalAccessor: {NanoOfSecond=0, InstantSeconds=1519915968, MilliOfSecond=0, MicroOfSecond=0},ISO of type java.time.format.Parsed
at java.base/java.time.LocalDate.from(LocalDate.java:396)
at java.base/java.time.LocalDateTime.from(LocalDateTime.java:456)
... 4 more日期的字符串表示形式完全类似于DateTimeFormatter.ISO_INSTANT：INSTANT的javadocs。而且它在java 9：INSTANT中没有改变
回答 2
Stack Overflow用户
回答已采纳
发布于 2018-03-02 09:36:45
我相信这是因为ISO_INSTANT是用来解析Instant的
正如javadoc所述：
这是一个特殊的案例格式化程序，旨在允许人类可读形式的
java.time.Instant。
此代码适用于：
String dateString = "2018-03-01T14:52:48Z";
DateTimeFormatter dtf = DateTimeFormatter.ISO_INSTANT;
Instant instant = Instant.from(dtf.parse(dateString));要使它成为本地时间，您可以使用以下命令：
LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, ZoneId.systemDefault())这是对这些错误的一个很好的解释：Java SE 8 TemporalAccessor.from issues when used with a java.time.Instant object
Stack Overflow用户
发布于 2018-03-02 09:36:31
LocalDateTime不使用t contain Zone in self. If you need parse string with zone useZonedDateTime`：
DateTimeFormatter dtf = DateTimeFormatter.ISO_INSTANT.withZone(ZoneId.systemDefault());
ZonedDateTime dateTime = ZonedDateTime.parse(dateString, dtf);页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/49066258
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