壓縮/解壓縮
| 指令 | 說明 |
|---|
| Compress-Archive | 壓縮 |
| Expand-Archive | 解壓縮 |
2個指令的常用參數相似，見以下說明。
壓縮整個資料夾
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Compress-Archive -Path C:\Folder -DestinationPath C:\Archive.zip
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壓縮多個檔案
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Compress-Archive -Path C:\Folder\file.docx, C:\Folder\picture.png -DestinationPath C:\Archive.zip
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更新壓縮檔(Update)/強制覆蓋(Force)
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Compress-Archive -Path C:\Folder\*.txt -Update -DestinationPath C:\Archive.zip
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Compress-Archive -Path C:\Folder\*.txt -Force -DestinationPath C:\Archive.zip
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指定壓縮層級(CompressionLevel)
| level | description |
|---|
| Fastest | 最快速方式壓縮。(檔案較大) |
| NoCompression | 不壓縮 |
| Optimal | 最佳化壓縮，此方式為預設值。(檔案較小) |
若要減少壓縮時間，可以Fastest壓縮層級進行壓縮
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| Compress-Archive -Path C:\Folder -CompressionLevel Fastest -DestinationPath C:\Archive.zip
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指名檔案名稱(LiteralPath)
大部分狀況下使用-Path可順利進行壓縮，若遇檔案名稱含有特殊字元或萬用字元等狀況，無法順利壓縮時，可改用-LiteralPath參數
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| Compress-Archive -LiteralPath D:\StrangeFileName.jpg -DestinationPath D:\MyArchive.zip
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加密壓縮(7-Zip)
powershell內建的Compress-Archive指令並無加密功能，改用7-Zip可在壓縮時加上密碼。
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| $7zipPath = "$env:ProgramFiles\7-Zip\7z.exe"
if (-not (Test-Path -Path $7zipPath -PathType Leaf)) {
throw "7 zip file '$7zipPath' not found"
}
Set-Alias 7zip $7zipPath
$Source = "c:\BackupFrom\backMeUp.txt"
$Target = "c:\BackupFolder\backup.zip"
$pass = [System.Web.Security.Membership]::GeneratePassword(10,2)
7zip a -mx=9 $Target $Source -p$pass
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Exit Codes from 7-Zip
| Code | Meaning |
|---|
| 0 | No error |
| 1 | Warning (Non fatal error(s)). For example, one or more files were locked by some other application, so they were not compressed. |
| 2 | Fatal error |
| 7 | Command line error |
| 8 | Not enough memory for operation |
| 255 | User stopped the process |