批处理字符串去空格实现代码

@echo off
:: 去掉左空格
::
::
set "str= ab c&>! "
for /f "tokens=*" %%i in ("%str%") do echo "☆%%i☆"
pause
goto :eof

@echo off
:: 去掉左空格
::
::
set "str= ab c&>! "
:intercept
if "%str:~0,1%"==" " set "str=%str:~1%"&goto intercept
echo "☆%str%☆"
pause
goto :eof

@echo off
:: 去掉右空格
::
::
set "str= ab c&>! "
:intercept
if "%str:~-1%"==" " set "str=%str:~0,-1%"&goto intercept
echo "☆%str%☆"
pause
goto :eof

@echo off
:: 去掉首尾空格空格
::
::
set "str= ab c&>! "
:intercept_left
if "%str:~0,1%"==" " set "str=%str:~1%"&goto intercept_left
:intercept_right
if "%str:~-1%"==" " set "str=%str:~0,-1%"&goto intercept_right
echo "☆%str%☆"
pause
goto :eof

@echo off
:: 去掉所有空格空格
::
::
set "str= ab c&>! "
set "str=%str: =%"
echo "☆%str%☆"
pause
goto :eof
@echo %dbg% off