我知道用PowerShell创建目录有三种方法:

Method 1: PS C:\> New-Item -ItemType Directory -path "C:\livingston"

Method 2: PS C:\> [system.io.directory]::CreateDirectory("C:\livingston")

Method 3: PS C:\> md "C:\livingston"

试试-Force参数:

New-Item -ItemType Directory -Force -Path C:\Path\That\May\Or\May\Not\Exist

可以先使用Test-Path -PathType容器进行检查。

请参阅新项目MSDN帮助文章了解更多详细信息。

从你的情况来看，听起来你需要每天创建一个“修订#”文件夹，里面有一个“报告”文件夹。如果是这样的话，你只需要知道下一个版本号是什么。编写一个函数来获取下一个修订号Get-NextRevisionNumber。或者你可以这样做:

foreach($Project in (Get-ChildItem "D:\TopDirec" -Directory)){
    # Select all the Revision folders from the project folder.
    $Revisions = Get-ChildItem "$($Project.Fullname)\Revision*" -Directory

    # The next revision number is just going to be one more than the highest number.
    # You need to cast the string in the first pipeline to an int so Sort-Object works.
    # If you sort it descending the first number will be the biggest so you select that one.
    # Once you have the highest revision number you just add one to it.
    $NextRevision = ($Revisions.Name | Foreach-Object {[int]$_.Replace('Revision','')} | Sort-Object -Descending | Select-Object -First 1)+1

    # Now in this we kill two birds with one stone.
    # It will create the "Reports" folder but it also creates "Revision#" folder too.
    New-Item -Path "$($Project.Fullname)\Revision$NextRevision\Reports" -Type Directory

    # Move on to the next project folder.
    # This untested example loop requires PowerShell version 3.0.
}

PowerShell 3.0安装。

这里有一个对我有用的简单方法。它会检查路径是否存在，如果不存在，它不仅会创建根路径，还会创建所有子目录:

$rptpath = "C:\temp\reports\exchange"

if (!(test-path -path $rptpath)) {new-item -path $rptpath -itemtype directory}

我希望能够方便地让用户为PowerShell创建一个默认配置文件来覆盖一些设置，并以以下一行程序结束(多个语句是可以的，但可以粘贴到PowerShell并立即执行，这是主要目标):

cls; [string]$filePath = $profile; [string]$fileContents = '<our standard settings>'; if(!(Test-Path $filePath)){md -Force ([System.IO.Path]::GetDirectoryName($filePath)) | Out-Null; $fileContents | sc $filePath; Write-Host 'File created!'; } else { Write-Warning 'File already exists!' };

为了可读性，以下是我在.ps1文件中如何做的:

cls; # Clear console to better notice the results
[string]$filePath = $profile; # Declared as string, to allow the use of texts without plings and still not fail.
[string]$fileContents = '<our standard settings>'; # Statements can now be written on individual lines, instead of semicolon separated.
if(!(Test-Path $filePath)) {
  New-Item -Force ([System.IO.Path]::GetDirectoryName($filePath)) | Out-Null; # Ignore output of creating directory
  $fileContents | Set-Content $filePath; # Creates a new file with the input
  Write-Host 'File created!';
}
else {
  Write-Warning "File already exists! To remove the file, run the command: Remove-Item $filePath";
};

当指定-Force标志时，如果文件夹已经存在，PowerShell将不会报错。

一行程序:

Get-ChildItem D:\TopDirec\SubDirec\Project* | `
  %{ Get-ChildItem $_.FullName -Filter Revision* } | `
  %{ New-Item -ItemType Directory -Force -Path (Join-Path $_.FullName "Reports") }

顺便说一下，要调度任务，请查看这个链接:调度后台任务。