使用Powershell重命名文件

Question

i have files in following format: Starts with 400 or Z400

• 40011111.mus
• 40011112.mus
• Z40011112.mus

I need to rename as following: Starts with Z100

• Z10011111.mus
• Z10011112.mus
• Z10011112.mus

Currently i have the following powershell function. but it adds Z as prefix. how do i undate the code so that it adds Z when necessary and changes 400 to 100?

function renameFiles{
    echo " Start Rename Files" 
    get-childitem -path $mapfolder | 
        Where-Object {$_.extension -eq ".ditamap"} | 
        foreach-object {
           echo "  Renaming: $_ --> Z$_"
           ren "$mapfolder\$_" "$mapfolder\Z$_"
    }
}

Answer 1

不要使用echo而是要使用某种东西，例如if或switch来处理各种情况：

function Rename-DitmapFile { get-childitem -path $mapfolder -Filter *.ditmap | foreach-object { switch ($_) { {$_.name.startswith('4')} {Rename-Item -Path $_.FullName -NewName ($_.Name -replace '4','Z1')} {$_.name.startswith('Z4')} {Rename-Item -Path $_.FullName -NewName ($_.Name -replace 'Z4','Z1')} } } }