如何使 java.sql.Timestamp UTC 时间?

问题描述

public static void main(String[] args) {

    LocalDateTime ldt = LocalDateTime.now();

    ZonedDateTime zdt = ZonedDateTime.of(ldt, ZoneId.systemDefault());

    Instant instant = Instant.from(zdt);

    Timestamp timestamp = Timestamp.from(instant);

    System.out.println(ldt + "
");

    System.out.println(zdt + "
");

    System.out.println(instant + "
");

    System.out.println(timestamp + "
");
}

然后打印出来:

2017-05-07T18:13:26.969

2017-05-07T18:13:26.969-04:00[America/New_York]

2017-05-07T22:13:26.969Z

2017-05-07 18:13:26.969

如何使 SQL Timestamp 与 Instant 的保存时间相同?我需要能够从任何地方获取 Timestamp 并将其转换为它碰巧在世界那个地方的任何时间.问题是它一直保存与我的系统时钟设置的时间相同.

How can I make an SQL Timestamp save with the same time as the Instant? I need to be able to get the Timestamp from anywhere and convert it to whatever time it happens to be in that part of the world. The problem is that it keeps saving as the same time as whatever my system clock happens to be set at.

推荐答案

你最好从 LocalDateTime 中获取 Timestamp，而不是从 Instant.

You are best to get a Timestamp from a LocalDateTime, rather than from an Instant.

第一步是获取您的 ZonedDateTime 并将其转换为 GMT:

The first step is to take your ZonedDateTime and convert it to GMT:

ZonedDateTime gmt = zdt.withZoneSameInstant(ZoneId.of("GMT"));

然后您可以通过 LocalDateTime 将其转换为 Timestamp:

Then you can convert it to a Timestamp via a LocalDateTime:

Timestamp timestamp = Timestamp.valueOf(gmt.toLocalDateTime());

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