我在PowerShell中有相同的错误，并使用此隔离并修复了它

$PSDefaultParameterValues['*:Encoding'] = 'utf8'

老问题，新答案:

虽然“旧的”powershell写一个BOM，但新的平台不可知的变体确实表现不同:默认是“无BOM”，它可以通过switch配置:

-Encoding Specifies the type of encoding for the target file. The default value is utf8NoBOM. The acceptable values for this parameter are as follows: ascii: Uses the encoding for the ASCII (7-bit) character set. bigendianunicode: Encodes in UTF-16 format using the big-endian byte order. oem: Uses the default encoding for MS-DOS and console programs. unicode: Encodes in UTF-16 format using the little-endian byte order. utf7: Encodes in UTF-7 format. utf8: Encodes in UTF-8 format. utf8BOM: Encodes in UTF-8 format with Byte Order Mark (BOM) utf8NoBOM: Encodes in UTF-8 format without Byte Order Mark (BOM) utf32: Encodes in UTF-32 format.

来源:https://learn.microsoft.com/de-de/powershell/module/Microsoft.PowerShell.Utility/Out-File?view=powershell-7 我特别强调

更改多个文件扩展到UTF-8没有BOM:

$Utf8NoBomEncoding = New-Object System.Text.UTF8Encoding($False)
foreach($i in ls -recurse -filter "*.java") {
    $MyFile = Get-Content $i.fullname 
    [System.IO.File]::WriteAllLines($i.fullname, $MyFile, $Utf8NoBomEncoding)
}

我建议只使用Set-Content命令，不需要其他任何命令。

我系统中的powershell版本是:-

PS C:\Users\XXXXX> $PSVersionTable.PSVersion | fl


Major         : 5
Minor         : 1
Build         : 19041
Revision      : 1682
MajorRevision : 0
MinorRevision : 1682

PS C:\Users\XXXXX>

所以你需要跟随。

PS C:\Users\XXXXX> Get-Content .\Downloads\finddate.txt
Thursday, June 23, 2022 5:57:59 PM
PS C:\Users\XXXXX> Get-Content .\Downloads\finddate.txt | Set-Content .\Downloads\anotherfile.txt
PS C:\Users\XXXXX> Get-Content .\Downloads\anotherfile.txt
Thursday, June 23, 2022 5:57:59 PM
PS C:\Users\XXXXX>

现在，当我们检查文件，根据截图，它是utf8。 anotherfile.txt

    [System.IO.FileInfo] $file = Get-Item -Path $FilePath 
    $sequenceBOM = New-Object System.Byte[] 3 
    $reader = $file.OpenRead() 
    $bytesRead = $reader.Read($sequenceBOM, 0, 3) 
    $reader.Dispose() 
    #A UTF-8+BOM string will start with the three following bytes. Hex: 0xEF0xBB0xBF, Decimal: 239 187 191 
    if ($bytesRead -eq 3 -and $sequenceBOM[0] -eq 239 -and $sequenceBOM[1] -eq 187 -and $sequenceBOM[2] -eq 191) 
    { 
        $utf8NoBomEncoding = New-Object System.Text.UTF8Encoding($False) 
        [System.IO.File]::WriteAllLines($FilePath, (Get-Content $FilePath), $utf8NoBomEncoding) 
        Write-Host "Remove UTF-8 BOM successfully" 
    } 
    Else 
    { 
        Write-Warning "Not UTF-8 BOM file" 
    }  

如何使用PowerShell从文件中删除UTF8字节顺序标记(BOM)

使用.NET的UTF8Encoding类并将$False传递给构造函数似乎是可行的:

$MyRawString = Get-Content -Raw $MyPath
$Utf8NoBomEncoding = New-Object System.Text.UTF8Encoding $False
[System.IO.File]::WriteAllLines($MyPath, $MyRawString, $Utf8NoBomEncoding)