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Windows PowerShell Character Encoding

发布时间 2023-06-27 01:36:04作者: UPeRVv

简述

背景

Win11 21H2(OS Build 22000.2057)

Windows PowerShell 5.1

$psversiontable 
~ > $psversiontable

Name                           Value
----                           -----
PSVersion                      5.1.22000.2003
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.22000.2003
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

0x03 Character Encoding

In general, Windows PowerShell uses the Unicode UTF-16LE encoding by default.

修改默认编码

  • $PSDefaultParameterValues
  • $OutputEncoding
    • The automatic variable $OutputEncoding affects the encoding PowerShell uses to communicate with external programs.
    • It has no effect on the encoding that the output redirection operators and PowerShell cmdlets use to save to files.

例：

  • $PSDefaultParameterValues['Out-File:Encoding'] = 'utf8'

相关 Cmdlet

Beginning in PowerShell 5.1, the redirection operators (> and >>) call the Out-File cmdlet.

具体表现：

  • Out-File and the redirection operators > and >> create UTF-16LE.
  • Set-Content and Add-Content use Default encoding.
  • New-Item -Type File -Value creates a BOM-less UTF-8 file.
  • Get-Content uses the Default ANSI encoding, in the absence of a BOM.

BOM (byte-order-mark)

In Windows PowerShell, any Unicode encoding, except UTF7, always creates a BOM.

PowerShell (v6 and higher) defaults to utf8NoBOM for all text output.

参考