說明如何使用 PowerShell 計算資料夾與檔案的大小。
說明
路徑下所有檔案的大小
get-childitem | select name, @{Name='FileSize'; Exp = {"{0:N0}" -f ($_.Length / 1KB)}}
資料夾檔案總和
(get-childitem c:\users\sdwh\ | measure Length -s).sum / 1MB
路徑下檔案與資料夾的檔案數以及檔案大小總和
結果會自動輸出至目前目錄下的 folder_sizes.csv
$directory = Get-Location
$global:report = @()
function Process-Folder {
param (
[string]$folderPath
)
$folderInfo = [PSCustomObject]@{
FullPath = $folderPath
FileCounts = (Get-ChildItem -Path $folderPath -File).Count
FolderCounts = (Get-ChildItem -Path $folderPath -Directory).Count
'TotalSize(MB)' = [math]::Round((Get-ChildItem -Path $folderPath -File | Measure-Object -Property Length -Sum).Sum / 1MB, 2)
}
$global:report += $folderInfo
$subfolders = Get-ChildItem -Path $folderPath -Directory
foreach ($subfolder in $subfolders) {
Process-Folder -folderPath $subfolder.FullName
}
}
Process-Folder -folderPath $directory
$global:report | Export-Csv -Path "folder_sizes.csv" -NoTypeInformation
⭐資料夾比較 (左、右側專有;共用但雜湊不同)
function Get-DirectoryContentsInfo {
[CmdletBinding()]
param (
[Parameter(Mandatory = $true)]
[string]$currentDirectory
)
$hash = @{}
Get-ChildItem -Path $currentDirectory -Recurse | ForEach-Object {
$relativePath = $_.FullName.Replace($currentDirectory, '')
$hash[$relativePath] = @{
Size = ($_.Length / 1KB)
Hash = (Get-FileHash -Algorithm SHA1 -Path $_.FullName).Hash
}
}
return $hash
}
function Compare-HashTables {
[CmdletBinding()]
param (
[Parameter(Mandatory = $true)]
[HashTable]$hash1,
[Parameter(Mandatory = $true)]
[HashTable]$hash2
)
$set1 = New-Object 'System.Collections.Generic.HashSet[string]'
$set2 = New-Object 'System.Collections.Generic.HashSet[string]'
$keys1 = $hash1.Keys
$keys2 = $hash2.Keys
foreach ($key in $keys1) { $set1.Add($key) }
foreach ($key in $keys2) { $set2.Add($key) }
$set1Copy = New-Object 'System.Collections.Generic.HashSet[string]' $set1
$set2Copy = New-Object 'System.Collections.Generic.HashSet[string]' $set2
$set1.IntersectWith($set2)
$set1Copy.ExceptWith($set2)
$set2Copy.ExceptWith($set1)
return [PSCustomObject]@{
LeftOnly = $set1Copy
RightOnly = $set2Copy
Both = $set1
}
}
function Compare-FilesAndExport {
param (
[Hashtable]$left,
[Hashtable]$right,
[String]$path
)
$results = @()
$left.Keys | ForEach-Object {
$item = $_
if (!$right.ContainsKey($item)) {
$results += [PSCustomObject]@{
Status = "Left"
FullPath = $item
Size = $left[$item].Size
Hash = $left[$item].Hash
Size2 = $null
Hash2 = $null
}
} else {
if ($left[$item].Hash -eq $right[$item].Hash) {
$results += [PSCustomObject]@{
Status = "Same"
FullPath = $item
Size = $left[$item].Size
Hash = $left[$item].Hash
Size2 = $null
Hash2 = $null
}
} else {
$results += [PSCustomObject]@{
Status = "Different"
FullPath = $item
Size = $left[$item].Size
Hash = $left[$item].Hash
Size2 = $right[$item].Size
Hash2 = $right[$item].Hash
}
}
}
}
$right.Keys | ForEach-Object {
$item = $_
if (!$left.ContainsKey($item)) {
$results += [PSCustomObject]@{
Status = "Right"
FullPath = $item
Size = $right[$item].Size
Hash = $right[$item].Hash
Size2 = $null
Hash2 = $null
}
}
}
$results | Sort-Object -Property Status | Export-Csv -Path $path -NoTypeInformation
}
$left = get-DirectoryContentsInfo 'D:\dir1'
$right = get-DirectoryContentsInfo 'D:\dir2'
$res = compare-HashTables $left $right
Compare-FilesAndExport $left $right "output.csv"
相關連結
Powershell 使用物件與資料結構 (Array, Hash)