问如何检查文件扩展名并相应地在windows批处理文件中使用默认程序打开

EN

:loop         
cd c:/Program Files (x86)/Adobe/Acrobat Reader DC/Reader
set dir1=folder location
for %%X IN ("%dir1%\*.*") DO ( 
taskkill /f /im "AcroRd32.exe"
taskkill /f /im "Powerpnt.exe"
taskkill /f /im "Winword.exe"
echo %%X
IF %%X EXIST "%dir1%\*.pdf" ( 
start /max AcroRd32.exe /A "pagemode=FullScreen" "%%X"
timeout /t 5
)
Else IF %%X EXIST "%dir1%\*.pptx" (
"C:\Program Files (x86)\Microsoft Office\root\Office16\Powerpnt.exe" /S "%%X"
 timeout /t 5
 )
 ELSE IF %%X EXIST "%dir1%\*.docx" (
 start /max "C:\Program Files (x86)\Microsoft  Office\root\Office16\Winword.exe"  "%%X"
 timeout /t 5
 )
 )
 goto loop