First of all, please understand that sentences can be strange because I use a translator.
I tried to use the getFile() method of the resource object returned by getResource() in multipartFile while implementing the Image Upload feature, but it is configured to throw an exception. I wonder why it is like this.
I've read Java Doc, but I can't tell because it only says that I'm throwing an exception
Let me try to understand your problem and help you.
The method getFile() is declared as "throws an exception". It doesn't mean it will throw an exception in any case. It just means that it CAN throw an exception under certain circumstances. This will force you as a programmer to implement some error handling logic. Usually in form of a try/catch block.
In this particular case the file should be "physically" accessed for reading. In a rare case it is not accessible or even doesn't exist anymore - you will get an exception and should handle it.
That's it all about. I hope it helps.