中国DOS联盟

@echo off&setlocal enabledelayedexpansion
for /f "delims=" %%i in ('dir /s /b *.txt') do (
     call :lp %%i
     for /f "delims=" %%j in ('dir /s /b *.txt') do if "%%~nj"=="!name!" set name=!name!%random:~,1%
ren "%%~dpnxi" "!name!.txt"
)
echo 改名全部完成！
pause>nul&goto :eof
:lp
for /f "delims=" %%i in (%~dpnx1) do (
     set a=%%i
     if not "!a:~10!"=="" set name=!a:~,10!&goto :eof
)

@echo off&setlocal enabledelayedexpansion
for /f "delims=" %%i in ('dir /s /b *.txt') do (
   set "name="
   for /f "delims=" %%a in ('type "%%i"') do (
      if not defined name set "name=%%a"
   )
   ren "%%i" "!name:~-10!%%~xi"
)
echo 改名全部完成！
pause>nul

@echo off&setlocal enabledelayedexpansion
for %%a in (*.txt) do (
   set n=0
   for /f "delims=" %%i in (%%a) do (
      set/a n+=1
      if !n! equ 1 set str=%%i&ren %%a !str:~0,10!.txt>nul 2>nul || ren %%a !str:~0,11!.txt
)
)
pause

@echo off&setlocal enabledelayedexpansion
for /f "delims=" %%i in ('dir /b *.txt') do (
   set n=0&set "name="
   for /f "delims=" %%a in ('type "%%i"') do (
      if not defined name set "name=%%a"
   )
   if exist "!name:~-10!%%~xi" (call :loop "%%i") else (
      ren "%%i" "!name:~-10!%%~xi"
    )
)
echo 改名全部完成！
pause>nul
exit
:loop
set /a n+=1
if exist "!name:~-10!%n%%~x1" goto loop
ren "%~1" "!name:~-10!%n%%~x1"
goto :eof