如何批量更改子文件夹中的文件扩展名 [英] How to Batch change file extensions within subfolders

问题描述

我对Command Prompt还是很陌生，直到1天才开始使用它.

I am very new to Command Prompt, and only started using it as of 1 day ago.

我在某个位置有一个文件夹，例如C:\Users\Administrator\Desktop\Images，在该文件夹中大约有650个子文件夹，每个子文件夹包含约20张图像，是JPG和PNG的混合.我正在寻找CMD的命令行，该命令行将遍历所有子文件夹并将每个.png文件更改为.jpg文件.

I have a folder in a location, for example C:\Users\Administrator\Desktop\Images, and inside that folder there is roughly 650 sub-folders, each containing around 20 images, a mix of JPG's and PNG's. I am looking for a command line for CMD which will go through all sub folders and change each .png file into a .jpg file.

我做了一些研究，发现了一些信息，但是很难遵循和理解，但我仍然无法做到.我想保留文件名，但是将每个文件扩展名从.png更改为.jpg.

I have done a little research and found some information, however it is very hard to follow and understand, and I am still unable to do it. I am wanting to keep the file names, however change each file extension from a .png to a .jpg.

我知道对于1个文件夹，该行类似于ren *.png *.jpg.但是，这不适用于子文件夹.

I understand that for 1 folder, the line is something like ren *.png *.jpg. However, this does not apply changes to subfolders.

推荐答案

如果我正确理解您只想将文件从.png重命名为.jpg，而不转换它们，则可以使用以下批处理代码:

If I understand correctly that you only want to rename the files from .png to .jpg, and not convert them, you could use the following batch code:

@ECHO OFF
PUSHD .
FOR /R %%d IN (.) DO (
    cd "%%d"
    IF EXIST *.png (
       REN *.png *.jpg
    )
)
POPD

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更新:我在此处找到了一个更好的解决方案，您可以从命令行直接运行它(在代替%f(如果在批处理文件中使用此代码):

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Update: I found a better solution here that you can run right from the command line (use %%f in stead of %f if using this inside a batch file):

FOR /R %f IN (*.png) DO REN "%f" *.jpg

请注意，以上内容将处理当前目录及其子目录.如有必要，可以将任意目录指定为根目录，如下所示:

Note that the above will process the current directory and its subdirectories. If necessary, you can specify an arbitrary directory as the root, like this:

FOR /R "D:\path\to\PNGs" %f IN (*.png) DO REN "%f" *.jpg

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