Five66

目录结构:
测试\a\MP3\MP3\b\MP3\c

放在测试文件夹里运行的结果:
测试\a\aMP3\MP3MP3\b\bMP3\c

@echo off 

set "name=mp3"
set n=6144

set m=%n%
for /r /d %%i in (mp?) do (
set p=%%i
call set "_%%n%%=%%p%%"
set /a n-=1
)

for /l %%i in (%n%,1,%m%) do (
set vn=%%i
call :aaa
)

echo,&pause&exit/b

:aaa
setlocal enabledelayedexpansion
if /i "!_%vn%:~-4!" == "\!name!" (
for /f "delims=" %%o in ("!_%vn%:~0,-4!") do set dadada=%%~no
echo,&echo,rename "!_%vn%!" to "!dadada!!_%vn%:~-3!"
rename "!_%vn%!" "!dadada!!_%vn%:~-3!"
)
endlocal
goto :eof
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