[文本处理] 请教批处理前辈如何批量删除文本内容？

@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! lss 2 echo %%i
        if !n! gtr 5 echo %%i
    ))>abc
    del %%a
    ren abc %%a
)
pause
复制代码

@echo off&setlocal enabledelayedexpansion
for %%z in (*.txt) do (
    set /p tmp=<"%%z"
    (echo !tmp!
    more +5 "%%z")>abc
    move>nul abc "%%z"
)
pause
复制代码

@echo off&setlocal enabledelayedexpansion
for %%z in (*.txt) do (
    (for /f "tokens=1* delims=:" %%a in ('findstr /n .* %%z^|findstr /v ^[2-5]:') do echo %%b)>abc
    move>nul abc "%%z"
)
pause
复制代码