batch-file - If Exist And Else 批量

Question

我将如何在其中添加和 Else 选项来表示：
您没有 java 开发工具包，请选择选项 4？

FOR /R "C:\Program Files" %%a IN (.) DO (
    IF EXIST "%%~a\javac.exe" ECHO You Have The Java Dev Kit Ignore Option 4
) 

Answer 1

您需要搜索所有子目录以确定它是否存在。

set found=0
FOR /R "C:\Program Files" %%a IN (.) DO (
    IF EXIST "%%~a\javac.exe" set found=1
)
if %found%==0 (
   ECHO You don't have the java dev kit please select option 4
) ELSE (
   echo Found javac.exe
)

Answer 2

SET found=0
FOR /R "C:\Program Files" %%a IN (.) DO (
    IF EXIST "%%~a\javac.exe" ( ECHO You Have The Java Dev Kit Ignore Option 4 
    SET found=1)
) 
IF %found%==0 ( ECHO You don't have the java dev kit please select option 4 )

如果你想要 ELSE，你必须使用(和)括号。