中国DOS联盟

chgcase.exe
Filename & directory case convertion.
http://cdebrock.free.fr/

chgcase.exe directory1 directory* file1 file*
-u: change to uppercase
-l: change to lowercase
-c: capitalize (first letter only: my file.ext -> My file.ext)
-C: capitalize (all words: my file.ext -> My File.ext)
-d: process directories only
-f: process files only
-v: verbose mode
Wildcards are ok.
Filters are applied in this order: u l c C.
-d and -f are default (process files AND directories)

ex.:
chgcase -v -l -c -f *
Lowercase then capitalize all files (not directories).
chgcase -v -u -c -d *
Uppercase then capitalize all directories (not files).

@echo off

set SrcDir=C:\test\aa

for %%a in ("%SrcDir%\*.*") do (

  set "str=%%~nxa"

  setlocal enabledelayedexpansion

  for %%a in (A B C D E F G H I J K L M N O P Q R S T U V W X Y Z) do (

    set str=!str:%%a=%%a!

  )

  ren "%%a" "!str!"

)