如何遍历 Windows Shell 中的一组文件夹？
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How do I iterate over a set of folders in Windows Shell?
提问by sharptooth
I'm currently trying to write a .cmd Windows Shell script that would iterate over a set of folders. However even the following simplest script:
我目前正在尝试编写一个 .cmd Windows Shell 脚本来遍历一组文件夹。然而，即使是以下最简单的脚本：
echo "%ROOT%"
for %%f in ("%ROOT%\Binaries\" ) do (
echo "%%f"
if not exist "%%f\Subfolder"
md "%%f\Subfolder"
)
outputs:
输出：
CurrentDir>echo "<ActualPathToRoot>"
"<ActualPathToRoot>"
%f\Subfolder was unexpected at this time
CurrentDir>if exists "%f\Subfolder"
What am I doing wrong? How do I alter that script so that it iterates over that one folder and once it see there's no subfolder named "Subfolder" it creates that subfolder? Also is there a good tutorial on writing such scripts?
我究竟做错了什么？我如何更改该脚本，以便它遍历那个文件夹，一旦它看到没有名为“子文件夹”的子文件夹，它就会创建该子文件夹？还有关于编写此类脚本的好教程吗？
采纳答案by detunized
This works for me:
这对我有用：
echo %ROOT%
for /D %%f in (%ROOT%\Binaries\*) do echo %%f && if not exist %%f\Subfolder md %%f\Subfolder
回答by Dennis G
For (sub)folder-iteration you need to use a different forparameter.
对于（子）文件夹迭代，您需要使用不同的for参数。
So if you want to list all directories of C:you should do this:
所以如果你想列出 C: 的所有目录，你应该这样做：
for /d %%A in (C:\*) do echo %%A
Note the parameter /dwhich indicates a directory. To go into subdirectories you need to do a recursive for with /r
请注意/d指示目录的参数。要进入子目录，您需要对 with 进行递归/r
for /r C:\Windows %%A in (*.jpg) do echo %%A
This would iterate through all Windows subdirectorieslooking for JPGs. Low behold you should be able to do /d /rand this reference suggestsyou can - I simply can't, but maybe you are able to do this?
这将遍历所有 Windows 子目录以查找 JPG。瞧，你应该能够做到/d /r，这个参考资料表明你可以——我根本不能，但也许你能够做到这一点？
A workaround I quickly jotted down is to just do a dirof all directories in a for loop:
我快速记下的解决方法是只dir在 for 循环中执行所有目录中的一个：
for /f "delims=" %%A in ('dir /ad/s/b') do echo %%A
Note that diris used in conjunction with /ad/s/bwhich performs a recursive listing of directories, printing the names of the directories found.
With these tools in your hand you should be able to do your if-subfolder construct. Note that you might need
请注意，dir与/ad/s/bwhich结合使用执行目录的递归列表，打印找到的目录的名称。
有了这些工具，您应该能够进行 if-subfolder 构造。请注意，您可能需要
