Question

"%%~xi"在批处理脚本命令中的含义是什么？

for %%i in (%1) do set ext="%%~xi"

我知道它的for循环占用1个命令行参数，“〜”是NOT而“i”是变量，但是“x”？这个命令做了什么？

Answer 1

来自FOR /?：

    %~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.

在批处理文件而不是cmd.exe窗口中，您可以将 % 字符加倍。

Answer 2

%%~xi为您提供文件扩展名。如果%%i为"somefile.txt"，则%%~xi将返回.txt。

Answer 3

参考： https://ss64.com/nt/syntax-args.html

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批处理脚本命令的工作？

3 个答案: