@echo off & SetLocal EnableDelayedExpansion
set /p p=输入1改名，输入2还原：
if "%p%"=="2" goto 2
set Str=abcdefghijklmnopqrstuvwxyz0123456789

for /f "delims=" %%a in ('dir /b') do (echo %%a
	for /l %%l in (1 1 12) do (
		set /a n = !random! %% 36
		call set r=%%str:~!n!,1%%!r!
	)
	if not "%%a"=="%~nx0" (
		if not "%%a"=="文件名.txt" (
			ren "%%a" !r!
			echo %%a^|!r! >>文件名.txt	
		)
	)
	set r=
)
pause
exit

:2
for /f "tokens=1,2 delims=|" %%a in (文件名.txt) do (ren %%b %%a)
del 文件名.txt
pause
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