unix“是哪个java” Windows上的等效命令？ [英] unix "which java" equivalent command on windows?

问题描述

可能重复：

Possible Duplicate:
Is there an equivalent of ‘which’ on windows?

无法在Google上找到它，但只是想知道是否有办法通过Windows提示符中的等效命令显示java的位置。

Failed to find it on Google, but just wondering if there is a way to reveal location of java by an equivalent command from Windows prompt.

基本上我从客户端获得的信息是他没有设置JAVA_HOME但仍然可以运行java程序。我怀疑它必须是因为java的路径是在系统PATH环境变量中设置的，但是这个时间太长而无法快速迭代，也非常痛苦（必须挖掘子文件夹）。

Basically I have info from client that he doesn't set the JAVA_HOME but still can run java programs. I suspect it then must because the path to that java is set in the system PATH environment variable, but that is just too long to iterate in a quick way, also very painful (have to dig into sub-folders).

感谢您提前提出任何建议！

Thanks for any suggestion in advance!

推荐答案

您可以尝试：

c:\> for %i in (java.exe) do @echo.   %~$PATH:i
   C:\WINDOWS\system32\java.exe

这是命令的Windows 的一个功能，您可以使用获取/？来获取详细信息：

In addition, substitution of FOR variable references has been enhanced.
You can now use the following optional syntax:
    %~I         - expands %I removing any surrounding quotes (")
    %~fI        - expands %I to a fully qualified path name
    %~dI        - expands %I to a drive letter only
    %~pI        - expands %I to a path only
    %~nI        - expands %I to a file name only
    %~xI        - expands %I to a file extension only
    %~sI        - expanded path contains short names only
    %~aI        - expands %I to file attributes of file
    %~tI        - expands %I to date/time of file
    %~zI        - expands %I to size of file
    %~$PATH:I   - searches the directories listed in the PATH
                   environment variable and expands %I to the
                   fully qualified name of the first one found.
                   If the environment variable name is not
                   defined or the file is not found by the
                   search, then this modifier expands to the
                   empty string

The modifiers can be combined to get compound results:
    %~dpI       - expands %I to a drive letter and path only
    %~nxI       - expands %I to a file name and extension only
    %~fsI       - expands %I to a full path name with short names only
    %~dp$PATH:I - searches the directories listed in the PATH
                   environment variable for %I and expands to the
                   drive letter and path of the first one found.
    %~ftzaI     - expands %I to a DIR like output line

In the above examples %I and PATH can be replaced by other valid
values.  The %~ syntax is terminated by a valid FOR variable name.
Picking upper case variable names like %I makes it more readable and
avoids confusion with the modifiers, which are not case sensitive.

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