Groovy-将时间戳字符串转换为大纪元时间（以毫秒为单位）

Question

我有一个时间戳字符串，如下所示：

String build_time=2017-11-20T21:27:03Z

我想根据PST时区将其转换为以毫秒为单位的纪元时间，因此我的结果是：

long build_time_ms=1511299623000

我怎样才能做到这一点？

Answer 1

您可以使用java的java.time.*软件包来实现。以下是工作脚本和通过docker运行groovy的输出。我没有在Jenkins中尝试过，脚本可能需要添加适当的def语句来避免管道序列化问题

脚本

import java.time.*

// build time as string
build_time='2017-11-20T21:27:03Z'

// parse and get epoch
time=Date.parse("yyyy-MM-dd'T'HH:mm:ss'Z'", build_time)

// get epoch milis
epoch_milis = time.getTime()

// create UTC local time
local_dt = LocalDateTime.ofInstant(Instant.ofEpochMilli(epoch_milis), ZoneId.of('UTC'));

// created zoned time out of UTC time
zoned_dt = local_dt.atZone(ZoneId.of('America/Los_Angeles'))

// get offset in milis
offset_ms = zoned_dt.getOffset().getTotalSeconds() * 1000

// add to UTC epoc
local_timestamp = epoch_milis + offset_ms

println "Time is ${local_timestamp}"

脚本输出，在常规REPL中运行

$ docker run --rm -it groovy
Nov 21, 2017 3:37:26 AM java.util.prefs.FileSystemPreferences$1 run
INFO: Created user preferences directory.
Groovy Shell (2.4.12, JVM: 1.8.0_141)
Type ':help' or ':h' for help.
----------------------------------------------------------------------------------------------------------------------------------------------------------------
groovy:000> import java.time.*
===> java.time.*
groovy:000> 
groovy:000> // build time as string
===> true
groovy:000> build_time='2017-11-20T21:27:03Z'
===> 2017-11-20T21:27:03Z
groovy:000> 
groovy:000> // parse and get epoch
===> true
groovy:000> time=Date.parse("yyyy-MM-dd'T'HH:mm:ss'Z'", build_time)
===> Mon Nov 20 21:27:03 UTC 2017
groovy:000> 
groovy:000> // get epoch milis
===> true
groovy:000> epoch_milis = time.getTime()
===> 1511213223000
groovy:000> 
groovy:000> // create UTC local time
===> true
groovy:000> local_dt = LocalDateTime.ofInstant(Instant.ofEpochMilli(epoch_milis), ZoneId.of('UTC'));
===> 2017-11-20T21:27:03
groovy:000> 
groovy:000> // created zoned time out of UTC time
===> true
groovy:000> zoned_dt = local_dt.atZone(ZoneId.of('America/Los_Angeles'))
===> 2017-11-20T21:27:03-08:00[America/Los_Angeles]
groovy:000> 
groovy:000> // get offset in milis
===> true
groovy:000> offset_ms = zoned_dt.getOffset().getTotalSeconds() * 1000
===> -28800000
groovy:000> 
groovy:000> // add to UTC epoc
===> true
groovy:000> local_timestamp = epoch_milis + offset_ms
===> 1511184423000
groovy:000> 
groovy:000> println "Time is ${local_timestamp}"
Time is 1511184423000

另外，在您的示例中，您将给出1511299623000 ms的结果，这似乎比时间戳提前24小时，请查看javascript控制台，并输入示例中的信息

new Date('2017-11-20T21:27:03Z')
>> Tue Nov 21 2017 08:27:03 GMT+1100 (AEDT)

new Date(1511299623000)
>> Wed Nov 22 2017 08:27:03 GMT+1100 (AEDT)