将多行字符串作为参数传递给Windows中的脚本

my_script.bat "This is line 1.\nThis is line 2.\nThis is line 3."

echo %1

my_script.bat< input.txt

@echo off
setlocal enableextensions enabledelayedexpansion
set "input="
for /f "delims=" %%a in (input.txt) do set "input=!input!%%a"
echo %input%

my_script.bat -< input.txt

@echo off
setlocal enableextensions enabledelayedexpansion
set "input="
for /f "delims=" %%a in ('findstr "^" ^<&3') do set "input=!input!%%a"
echo %input%