@echo off & setlocal enabledelayedexpansion
:deal
for /f "delims=" %%a in ("%~1") do (
	set fn=%%~na
	set ext=%%~xa
	for /f "tokens=1-3* delims=，" %%i in ("!fn!") do (
		set /a n=%random%%%1000& set m=000!n!
		set bnum=B!date:~2,2!!date:~5,2!!date:~8,2!!m:~-3!
		ren "%~1" "!fn!，!bnum!!ext!"
	)
)
shift
if "%~1" neq "" goto deal
pause & exit /b
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