String 在Windows中替换多个文件中的多个模式的选项

Win2003服务器中的源文件夹包含150000个文件，大小约为4GB。需要递归地替换XML文件中的一些模式

$files = Get-ChildItem "source_folder" -Filter *.xml -Recurse
Write-Host $files.count "files present in source" 
foreach ($file in $files) {
      (Get-Content $file.PSPath) | 
          Foreach-Object { $_ -replace "string1", "replacement1" } | Foreach-Object { $_ -replace "string2", "replacement2" } | Set-Content $file.PSPath  
       Write-Host $file.PSPath " modified" 
}

---

此代码需要一个多小时才能完成。实现这一目标的最佳方式是什么？减少所需时间的选项有哪些？使用PERL做这件事更好吗？建议会有很大帮助

您可以使用perl一行程序—类似于：

perl -p -i -e 's/oldstring/newstring/g' `grep -ril --include *.xml oldstring *`

如果要保留原始文件的备份，请执行以下操作：

perl -p -i'.bak' -e 's/oldstring/newstring/g' `grep -ril --include *.xml oldstring *`

---

您可以使用perl单行程序—类似于：

perl -p -i -e 's/oldstring/newstring/g' `grep -ril --include *.xml oldstring *`

如果要保留原始文件的备份，请执行以下操作：

perl -p -i'.bak' -e 's/oldstring/newstring/g' `grep -ril --include *.xml oldstring *`

---

虽然我没有相同的资源来测试这一点，但我怀疑如果您避免使用这么多管道，它会运行得更快，比如：

$files = Get-ChildItem "source_folder" -Filter *.xml -Recurse
Write-Host $files.count "files present in source" 
foreach ($file in $files) {
    $s = Get-Content $file.PSPath
    $s = $s -replace "string1", "replacement1") -replace "string2", "replacement2" 
    Set-Content $file.PSPath  -Value $s
    Write-Host $file.PSPath " modified" 
}

foreach ($file in $files) {
      $content = [System.IO.File]::ReadAllText($file).Replace("val1","val2")
    [System.IO.File]::WriteAllText($file, $content) 
       Write-Host $file.PSPath " modified" 
}

    $files = Get-ChildItem "C:\temp" -Filter *.xml -Recurse -File
    foreach ($file in $files) 
    {

    (Get-Content $file.FullName) | Foreach-Object {
        $_ -replace 'something1', 'something1aa' `
           -replace 'something2', 'something2bb' `
           -replace 'something3', 'something3cc' `
           -replace 'something4', 'something4dd' `
           -replace 'something5', 'something5dsf' `
           -replace 'something6', 'something6dfsfds'
        } | Set-Content $file.FullName

        Write-Host $file.FullName " analysed" 
    }

管道机制有一些开销，这应该避免。我很想听听这对你的案子有多大影响

---

还有一点，最好在Set Content命令中添加一个

-Encoding

值，以控制输出文件的编码方式

虽然我没有相同的资源来测试这一点，但我怀疑如果你避开这么多管道，它会运行得更快，比如：

$files = Get-ChildItem "source_folder" -Filter *.xml -Recurse
Write-Host $files.count "files present in source" 
foreach ($file in $files) {
    $s = Get-Content $file.PSPath
    $s = $s -replace "string1", "replacement1") -replace "string2", "replacement2" 
    Set-Content $file.PSPath  -Value $s
    Write-Host $file.PSPath " modified" 
}

foreach ($file in $files) {
      $content = [System.IO.File]::ReadAllText($file).Replace("val1","val2")
    [System.IO.File]::WriteAllText($file, $content) 
       Write-Host $file.PSPath " modified" 
}

    $files = Get-ChildItem "C:\temp" -Filter *.xml -Recurse -File
    foreach ($file in $files) 
    {

    (Get-Content $file.FullName) | Foreach-Object {
        $_ -replace 'something1', 'something1aa' `
           -replace 'something2', 'something2bb' `
           -replace 'something3', 'something3cc' `
           -replace 'something4', 'something4dd' `
           -replace 'something5', 'something5dsf' `
           -replace 'something6', 'something6dfsfds'
        } | Set-Content $file.FullName

        Write-Host $file.FullName " analysed" 
    }

管道机制有一些开销，这应该避免。我很想听听这对你的案子有多大影响

---

还有一点，最好在Set Content命令中添加一个

-Encoding

值，以控制输出文件的编码方式

首先，您应该为此使用.NET类。 单凭这一点就可以节省你很多时间。另外，您确实应该使用v3版本替换（即.replace方法）。它更快

所以看起来是这样的：

$files = Get-ChildItem "source_folder" -Filter *.xml -Recurse
Write-Host $files.count "files present in source" 
foreach ($file in $files) {
    $s = Get-Content $file.PSPath
    $s = $s -replace "string1", "replacement1") -replace "string2", "replacement2" 
    Set-Content $file.PSPath  -Value $s
    Write-Host $file.PSPath " modified" 
}

foreach ($file in $files) {
      $content = [System.IO.File]::ReadAllText($file).Replace("val1","val2")
    [System.IO.File]::WriteAllText($file, $content) 
       Write-Host $file.PSPath " modified" 
}

    $files = Get-ChildItem "C:\temp" -Filter *.xml -Recurse -File
    foreach ($file in $files) 
    {

    (Get-Content $file.FullName) | Foreach-Object {
        $_ -replace 'something1', 'something1aa' `
           -replace 'something2', 'something2bb' `
           -replace 'something3', 'something3cc' `
           -replace 'something4', 'something4dd' `
           -replace 'something5', 'something5dsf' `
           -replace 'something6', 'something6dfsfds'
        } | Set-Content $file.FullName

        Write-Host $file.FullName " analysed" 
    }

---

首先，您应该为此使用.NET类。 单凭这一点就可以节省你很多时间。另外，您确实应该使用v3版本替换（即.replace方法）。它更快

所以看起来是这样的：

$files = Get-ChildItem "source_folder" -Filter *.xml -Recurse
Write-Host $files.count "files present in source" 
foreach ($file in $files) {
    $s = Get-Content $file.PSPath
    $s = $s -replace "string1", "replacement1") -replace "string2", "replacement2" 
    Set-Content $file.PSPath  -Value $s
    Write-Host $file.PSPath " modified" 
}

foreach ($file in $files) {
      $content = [System.IO.File]::ReadAllText($file).Replace("val1","val2")
    [System.IO.File]::WriteAllText($file, $content) 
       Write-Host $file.PSPath " modified" 
}

    $files = Get-ChildItem "C:\temp" -Filter *.xml -Recurse -File
    foreach ($file in $files) 
    {

    (Get-Content $file.FullName) | Foreach-Object {
        $_ -replace 'something1', 'something1aa' `
           -replace 'something2', 'something2bb' `
           -replace 'something3', 'something3cc' `
           -replace 'something4', 'something4dd' `
           -replace 'something5', 'something5dsf' `
           -replace 'something6', 'something6dfsfds'
        } | Set-Content $file.FullName

        Write-Host $file.FullName " analysed" 
    }

---

尝试按如下方式修改代码：

$files = Get-ChildItem "source_folder" -Filter *.xml -Recurse
Write-Host $files.count "files present in source" 
foreach ($file in $files) {
    $s = Get-Content $file.PSPath
    $s = $s -replace "string1", "replacement1") -replace "string2", "replacement2" 
    Set-Content $file.PSPath  -Value $s
    Write-Host $file.PSPath " modified" 
}

foreach ($file in $files) {
      $content = [System.IO.File]::ReadAllText($file).Replace("val1","val2")
    [System.IO.File]::WriteAllText($file, $content) 
       Write-Host $file.PSPath " modified" 
}

    $files = Get-ChildItem "C:\temp" -Filter *.xml -Recurse -File
    foreach ($file in $files) 
    {

    (Get-Content $file.FullName) | Foreach-Object {
        $_ -replace 'something1', 'something1aa' `
           -replace 'something2', 'something2bb' `
           -replace 'something3', 'something3cc' `
           -replace 'something4', 'something4dd' `
           -replace 'something5', 'something5dsf' `
           -replace 'something6', 'something6dfsfds'
        } | Set-Content $file.FullName

        Write-Host $file.FullName " analysed" 
    }

---

尝试按如下方式修改代码：

$files = Get-ChildItem "source_folder" -Filter *.xml -Recurse
Write-Host $files.count "files present in source" 
foreach ($file in $files) {
    $s = Get-Content $file.PSPath
    $s = $s -replace "string1", "replacement1") -replace "string2", "replacement2" 
    Set-Content $file.PSPath  -Value $s
    Write-Host $file.PSPath " modified" 
}

foreach ($file in $files) {
      $content = [System.IO.File]::ReadAllText($file).Replace("val1","val2")
    [System.IO.File]::WriteAllText($file, $content) 
       Write-Host $file.PSPath " modified" 
}

    $files = Get-ChildItem "C:\temp" -Filter *.xml -Recurse -File
    foreach ($file in $files) 
    {

    (Get-Content $file.FullName) | Foreach-Object {
        $_ -replace 'something1', 'something1aa' `
           -replace 'something2', 'something2bb' `
           -replace 'something3', 'something3cc' `
           -replace 'something4', 'something4dd' `
           -replace 'something5', 'something5dsf' `
           -replace 'something6', 'something6dfsfds'
        } | Set-Content $file.FullName

        Write-Host $file.FullName " analysed" 
    }