PowerShell 技能连载 - 从目录结构中删除所有文件

有些任务听起来复杂，实际上并没有那么复杂。假设我们需要清除一个目录结构，移除所有文件，而留下空白的文件夹。我们进一步假设有一些文件位于白名单上，不应移除。如果用 PowerShell，那么实现起来很容易：

# Task:
# remove all files from a folder structure, but keep all folders,
# and keep all files on a whitelist

$Path = "c:\sample"
$WhiteList = "important.txt", "something.csv"

Get-ChildItem -Path $Path -File -Exclude $WhiteList -Recurse -Force |
    # remove -WhatIf if you want to actually delete files
# ATTENTION: test thoroughly before doing this!
# you may want to add -Force to Remove-Item to forcefully remove files
    Remove-Item -WhatIf