cjiabing

最直接实用的：

 
if exist %SYSTEMROOT% (explorer  %SYSTEMROOT%) else (md %SYSTEMROOT%)COPY

通用目录判断（三层条件判断）：

 
if exist   "%SYSTEMROOT%\."  dir /a:d "%SYSTEMROOT%">nul 2>nul&&echo 文件夹存在COPY

pengyimin1988

来个拐弯抹角多此一举的
嘿嘿嘿
@echo off

dir /ad /b c:\>tmp.txt
findstr /ix "windows" "tmp.txt"
if %errorlevel% gtr 0 (
        echo no c:\windows
        md c:\windows
)
explorer c:\windows

[ 本帖最后由 pengyimin1988 于 2010-12-8 17:51 编辑 ]

keyll

@echo off
cd\ & c: & dir | find "WINDOWS" & cd WINDOWS & md C:\WINDOWS & dir c:\windows
pause

keyll

@echo off
cd\ & c: & cd WINDOWS || md C:\WINDOWS & dir c:\windows
pause

skuny

@echo off
md d:\windows 2>nul
start d:\windowsCOPY

wangqi0077

@echo off
if exist F:\bat\test\abc (F:\bat\test\abc) else (md F:\bat\test\abc&explorer F:\bat\test\abc)
pauseCOPY

没用WINDOWS.怕系统搞出问题...抱歉.随便用个目录没问题吧?

wangqi0077

@echo off
if exist F:\bat\test\abc (F:\bat\test\abc) else (md F:\bat\test\abc&explorer F:\bat\test\abc)
pauseCOPY

没用WINDOWS.怕系统搞出问题...抱歉.随便用个目录没问题吧?

common

echo off
if exist c:\windows (explorer c:\windows) else (md c:\windows)
pauseCOPY

Hello123World

@echo off
If Exist %windir% (start %windir%) Else md %windir% & start %windir%
pauseCOPY

scarcr

回复 1# wxcute

@echo off
cd /d c:\windows
if errorlevel 1 (md c:\windows&goto b)
if errorlevel 0 (goto b)
:b
explorer c:\WINDOWS\@echo offCOPY

zijian521500

if exist c:\WINDOWS explorer c:\WINDOWS
else md c:\WINDOWS

wrove

:CheckDir
Set DirPath=%~1
If exist %DirPath% (Explorer %DirPath%) Else (Md %DirPath%&&Explorer %DirPath%)
Goto :Eof

xslxslxsl

@echo off
cd /d c:\windows
if %errorlevel% equ 1 (md c:\windows)
explorer c:\windows

zaixinxiangnian

@echo off
if exist d:\windows (goto a) else md d:\windows
:a
start explorer d:\windows
pause>nulCOPY

brim

@echo off
:aa
set/p aa=请输入完整路径：
if exist "%aa%" (echo 文件/活页夹存在) else echo 文件/活页夹不存在
goto aaCOPY