Powershell Move-Item Rename If File Exists

问题

I have a powershell script that takes all of the files in one directory, renames the first one and moves it, and then goes to the next file. Sometimes there will be multiple files that get renamed to the same name (because of the system that it's going to, not ideal and will have to change) and was overwriting files that shouldn't have been getting overwritten with -force. I need all of the files to move but also have unique names so we have them available in the destination location. Is there an easy way to have it automatically rename so it would look like:

123.txt 123(1).txt 123(2).txt

or

123.txt 123_1.txt 123_2.txt

回答1:

There's no built-in way to do that. Give this a try:

$src = "d:\temp"
$dest = "d:\temp1"
$num=1

Get-ChildItem -Path $src -Filter *.txt -Recurse | ForEach-Object {

    $nextName = Join-Path -Path $dest -ChildPath $_.name

    while(Test-Path -Path $nextName)
    {
       $nextName = Join-Path $dest ($_.BaseName + "_$num" + $_.Extension)    
       $num+=1   
    }

    $_ | Move-Item -Destination $nextName
}

来源：https://stackoverflow.com/questions/16839787/powershell-move-item-rename-if-file-exists