[文件操作] 批处理如何实现文件版本更替，并保留最新文件？

del /p *#*.pdf
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dir 'E:\Test\*.pdf' | sort{1*($_.BaseName -split '#(\d+)$')[1]} -Desc | group{($_.BaseName -split '#\d+$')[0]} | ?{$_.Count-1} | %{del $_.Group[1..($_.Count-1)] -WhatIf; ren $_.Group[0] -NewName ($_.Group[0].Name -replace '#\d+(\.pdf)$','$1') -WhatIf }
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@echo off
PowerShell -exec ByPass -c "dir -Literal 'E:\Test' -filter *.pdf | sort{1*($_.BaseName -split '#(\d+)$')[1]} -Desc | group{$_.BaseName -replace '#\d+$'} | ?{$_.Count-1} | %%{ $f = $_.Group | select -Exp fullName; del -Literal $f[1..($_.Count-1)] -WhatIf; mv -Literal $f[0] -Dest ($f[0] -replace '#\d+(\.pdf)$','$1') -WhatIf}"
pause
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@echo off
setlocal enabledelayedexpansion
REM 循环所有pdf文件
for /f "delims=" %%i in ('dir /b *.pdf ^| sort') do (
	for /f "tokens=1,2 delims=#." %%a in ("%%i") do (
		set "curFileName=%%a"
		set "curVer=%%b"
		if "!curVer!"=="pdf" set "curVer=0"
	)
	if "!lastFileName!"=="" set "lastFile=%%i"&set "lastFileName=!curFileName!"&set "lastVer=!curVer!"
	if "!curFileName!"=="!lastFileName!" (
		REM 删掉ECHO
		if !curVer! lss !lastVer!  ECHO del "%%i"&set "curVer=!lastVer!"
		REM 删掉ECHO
		if !curVer! gtr !lastVer! ECHO del "!lastFile!"&set "lastFile=%%i"
		set "lastFileName=!curFileName!"&set "lastVer=!curVer!"
	) else ( 
		echo ---^> !lastFileName!最新版本:!lastVer!
		REM 删掉ECHO
		ECHO rename "!lastFileName!#!lastVer!.pdf" "!lastFileName!.pdf"
		set "lastFile=%%i"&set "lastFileName=!curFileName!"&set "lastVer=!curVer!"
		echo --------------------------------------------------
	)
)
echo ---^> !lastFileName!最新版本:!lastVer!
REM 删掉ECHO
ECHO rename "!lastFileName!#!lastVer!.pdf" "!lastFileName!.pdf"
echo --------------------------------------------------
pause
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