在Powershell中格式化来自不同时区的时间/日期 [英] Formatting Time/Date from different time zones in Powershell

问题描述

我需要使用 Powershell 将 UTC 时间/日期输出转换为 ISO 8601(或类似)格式的东部标准时间，以便在 DOS 批处理文件中使用.

I need to convert UTC time/date output to Eastern Standard Time in ISO 8601 (or similar) format using Powershell for use in a DOS Batch file.

我对 Powershell 的经验很少，但以前修改过各种 DOS 批处理文件的现有 Powershell 命令.Powershell 可以轻松地从多个时区输出时间/日期，但不清楚它是否可以轻松地以数字格式显示该输出.

I have very little experience with Powershell, but have previously modified existing Powershell commands for various DOS batch files. Powershell can easily output time/date from numerous time zones, but it's not clear if it can readily display that output in a numerical format.

在DOS批处理文件中，可以调用Powershell以这种格式显示UTC时间--

In a DOS batch file, Powershell can be called to display UTC time in this format --

echo | powershell (get-date).ToUniversalTime().ToString('yyyy-MM-ddTHH:mm:ss')

我需要调用其他时区，但输出是拼写为FullDateTimePattern" --

I need to call upon other time zones, but the output is 'FullDateTimePattern' which is spelled out --

echo | Powershell [System.TimeZoneInfo]::ConvertTimeBySystemTimeZoneId((Get-Date), 'Line Islands Standard Time')

我希望之前的命令可以(以某种方式)合并在一起，或者如果可以将Get-Date -format"说明符之一应用于第二个代码示例，或者是否可以将偏移值应用于UTC 时间/日期输出，或者是否有其他一些简单的代码解决方案(或实用程序)可以合并到 DOS 批处理文件中.

I was hoping that the previous commands could (somehow) be merged together, or if one of the 'Get-Date -format' specifiers could be applied to the second code sample, or if an offset value could be applied to the UTC time/date output, or if there is some other easy code solution (or utility) that I could incorporate into a DOS batch file.

推荐答案

将当前 UTC [datetime] 即时转换为指定格式的东部标准时间:

To convert the current UTC [datetime] instant to Eastern Standard Time with the specified format:

powershell.exe -c "[System.TimeZoneInfo]::ConvertTimeBySystemTimeZoneId([datetime]::UtcNow, 'Eastern Standard Time').ToString('yyyy-MM-ddTHH:mm:ss')"

请注意以下额外改进:

• 不需要 echo |:当使用带有(可能隐含)-Command/-c 的命令调用 PowerShell 时，完成该命令后它会自动退出.(顺便说一句，echo | 不只是发送一个 换行符，它发送字符串 ECHO is on.，然后是一个换行符；要仅发送换行符，您必须使用 echo.|

• No need for echo |: When PowerShell is invoked with a command with (possibly implied) -Command / -c, it automatically exits after completing that command. (As an aside, echo | doesn't send just a newline, it sends the string ECHO is on., followed by a newline; to send just a newline, you'd have to use echo. |

Option -c (-Command) 被显式使用，不仅是为了使意图更清晰，而且还便于以后向 PowerShell 的潜在过渡Core，其中 -Command 不再是默认值(-File 是).

Option -c (-Command) is used explicitly, not just to make the intent clearer, but also to ease potential later transition to PowerShell Core, where -Command is no longer the default (-File is).

虽然您的特定命令可以在没有双引号 ("...") 的情况下工作，但通常最好使用它们，以便包含 cmd.exe 的命令 元字符 - 例如，& - 不要破坏.

While your specific command would work without the enclosing double quotes ("..."), it's generally better to use them, so that commands that include cmd.exe metacharacter - e.g., & - don't break.

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