这是什么时间戳格式？

Question

我一直在试图弄清楚这是什么时间戳：

2021-01-06T11:00:00.459907-07:00

特别是 .459907，我一直在网上寻找，但一直找不到。

Answer 1

ISO 8601

格式为国际标准ISO 8601。长话短说在最下面link

.459907 是几分之一秒。另一种描述方式是上午 11 点后时间为 459907 微秒（百万分之一秒）。时间部分之前的固定字母 T（我想是时间）是 ISO 8601 的特征。

您的字符串还包括一个日期，2021 年 1 月 6 日，以及与 UTC 的负 7 小时 00 分钟的偏移量。例如，这样的偏移量将在每年的这个时候在 America/Edmonton 和 America/Denver 时区（山区时间）中使用。偏移量 -07:00 表示时间比 UTC 晚 7 小时。所以相应的 UTC 时间将是 18:00:00.459907.

Link

Wikipedia article: ISO 8601

Answer 2

在奥莱 V.V。已经描述了这个日期时间字符串的格式。这个回答对他的回答进行了补充。

大多数语言都有库来解析这种日期时间字符串 directly/indirectly 例如在 Java 中，您可以将此字符串解析为 OffsetDateTime，从而从中检索个人信息。

演示：

import java.time.Duration;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;
import java.time.temporal.ChronoField;
import java.util.concurrent.TimeUnit;

public class Main {
    public static void main(String[] args) {
        OffsetDateTime odt = OffsetDateTime.parse("2021-01-06T11:00:00.459907-07:00");
        long nanos = odt.getNano();
        System.out.println(odt + " has " + nanos + " nanoseconds");
        System.out.println(odt + " has " + odt.get(ChronoField.MICRO_OF_SECOND) + " microseconds");
        System.out.println(odt + " has " + odt.get(ChronoField.MILLI_OF_SECOND) + " milliseconds");
        System.out.println(nanos + " nanoseconds = " + TimeUnit.NANOSECONDS.toMicros(nanos) + " microseconds");
        System.out.println(nanos + " nanoseconds = " + TimeUnit.NANOSECONDS.toMillis(nanos) + " milliseconds");
        System.out.println(odt + " has a zone-offset of " + odt.getOffset() + " from UTC");
        System.out.println("Month: " + odt.getMonth());
        System.out.println("Day of month: " + odt.getDayOfMonth());
        System.out.println("Weekday name: " + odt.getDayOfWeek());
        System.out.println("Week of the year: " + odt.get(ChronoField.ALIGNED_WEEK_OF_YEAR));
        System.out
                .println("In terms of UTC, " + odt + " can be represented as " + odt.atZoneSameInstant(ZoneOffset.UTC));

        OffsetDateTime odtWithNextCompleteSecond = OffsetDateTime.parse("2021-01-06T11:00:01-07:00");
        System.out.println("After " + Duration.between(odt, odtWithNextCompleteSecond).toNanos()
                + " nanoseconds, this time will change to " + odtWithNextCompleteSecond);
    }
}

输出：

2021-01-06T11:00:00.459907-07:00 has 459907000 nanoseconds
2021-01-06T11:00:00.459907-07:00 has 459907 microseconds
2021-01-06T11:00:00.459907-07:00 has 459 milliseconds
459907000 nanoseconds = 459907 microseconds
459907000 nanoseconds = 459 milliseconds
2021-01-06T11:00:00.459907-07:00 has a zone-offset of -07:00 from UTC
Month: JANUARY
Day of month: 6
Weekday name: WEDNESDAY
Week of the year: 1
In terms of UTC, 2021-01-06T11:00:00.459907-07:00 can be represented as 2021-01-06T18:00:00.459907Z
After 540093000 nanoseconds, this time will change to 2021-01-06T11:00:01-07:00

任何具有 Java 工作知识的人都可以从 Trail: Date Time.

了解日期时间 API

这是什么时间戳格式？

What time stamp format is this?

timestamp

datetime-format

ISO 8601

Link