如何使用java-8转换以utc秒为单位的时间和以秒为单位的时区偏移量? [英] How to convert time in utc second and timezone offset in second to date using java-8?

问题描述

我有一个以utc秒为单位的日期，其时区以sec为单位.我想使用java8 ZoneOffset类将其转换为格式为yyyy-mm-dd的日期字符串.以下是时间(以秒为单位)和偏移量

I have a date in utc second and its time zone offset in sec. I would like to convert it to date string in format yyyy-mm-dd using java8 ZoneOffset class. Below is the time in seconds and offset

long time = 1574962442,
long offset = 3600

现在我想使用java-8 DateTime API以以下格式获取日期吗?

Now i want to obtain date in below format using java-8 DateTime API ?

 String date = 2019-11-28 // in yyyy-MM-dd

推荐答案

您可以使用即时以获取

You can use Instant from java-8 DateTime API to obtains an OffsetDateTime of Instant from epoch seconds with offset seconds

OffsetDateTime offsetDateTime = Instant.ofEpochSecond(time)
                                .atOffset(ZoneOffset.ofTotalSeconds(offset));

然后从中获取 LocalDate 它

LocalDate localdate = offsetDateTime.toLocalDate();  //2019-11-28

如果要以字符串格式输出，请使用 DateTimeFormatter

If you want string formatted output use DateTimeFormatter

String output = localdate.format(DateTimeFormatter.ISO_LOCAL_DATE);

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