BAT批处理判断目录在%Path%中实现方法

貌似没有很优美的做法，只能把%path%按分号分割，然后一段一段地比较。

:inpath [in]path [out]0/1
setlocal
set localpathcopy=%path%
set result=0
:while
if "%localpathcopy" == "" goto wend
for /f "delims=;" %%i in ("%localpathcopy%") do (
  if /i "%%~i" == "%~1" (
    set result=1
    goto wend
  )
)
for /f "delims=; tokens=1,*" %%i in ("%localpathcopy%") do (
  set localpathcopy=%%~j
)
goto while
 
:wend
 
:inpathret
endlocal & set %2=%result% & goto :eof

使用方法：

set x=c:\windows
call :inpath %x% result
if %result% == 0 set path=%path%;%x%