BAT:文件中替换字符(保留空格和换行)

@echo off
rem CMD:"color --help"
:: setting color:back white,content blue
color f9

::old string and replace string
set old_str=ip
set new_str=#ip

:FILE
set "souerce_path=D:\xxx\bat\my_test.txt"
for /f "tokens=1* delims=:" %%i in ('findstr /n .* "%souerce_path%"') do (
    set "lineContent=%%j"
    ::echo ==%%j==
    setlocal EnableDelayedExpansion
    if not "!lineContent!"=="" set "lineContent=!lineContent:%old_str%=%new_str%!"
    >>"temp.txt" echo.!lineContent!
    endlocal
)
move /y temp.txt "%souerce_path%"
goto END

:PATH
::files path
set "souerce_path=D:/xxx/bat"
cd /d "%souerce_path%"

:: dir /s /b /a-d *.txt  ::get all current and sub path file name with post .txt
for /f "delims="  %%a in ('dir /s /b /a-d *.txt') do ( 
    for /f "tokens=1* delims=:" %%i in ('findstr /n .* "%%a"') do (
        set "lineContent=%%j"
        ::echo ==%%j==
        ::here use "setlocal EnableDelayedExpansion" to keep content "!"
        setlocal EnableDelayedExpansion
        if not "!lineContent!"=="" set "lineContent=!lineContent:%old_str%=%new_str%!"
        >>"%%~dpnxas" echo.!lineContent!
        endlocal
    )
    del /s /q /f "%%a" >nul 
    ren *.txts *.txt
)
:END
echo   ---------ok----------
pause>nul