Spring not accepting list of multipart files: java.lang.NoSuchMethodException: org.springframework.web.multipart.MultipartFile

Question

I was sending this via AJAX:

var formData = new FormData();
var totalfiles = document.getElementById('files').files.length;
for (var index = 0; index < totalfiles; index++) {
    formData.append("files", document.getElementById('files').files[index]);
}

And with my Spring 4 application, it should have been received by this method:

@RequestMapping(value = "/mapUploads/submit", method = RequestMethod.POST)
protected void check(HttpServletRequest request, List<MultipartFile> files)

But for some reason, Spring 4 was telling me that the bean could not be instantiated:

java.lang.NoSuchMethodException: org.springframework.web.multipart.MultipartFile

In debugging mode, it wasn't even entering the method parameter.

Rigo Sarmiento · Accepted Answer · 2020-09-03 05:49:39Z

Change the method signature to this:

@RequestMapping(value = "/mapUploads/submit", method = RequestMethod.POST)
protected void check(HttpServletRequest request) {
   MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
   List<MultipartFile> files = multipartRequest.getFiles("files");
}

This problem was solved here. But in that question, OP was only using a single File in his parameter - and this is actually solvable by just adding MultipartFile in the parameter signature:

@RequestMapping(value = "/mapUploads/submit", method = RequestMethod.POST)
protected void check(HttpServletRequest request, MultipartFile>files)

This was my previous circumstance, but I ran into the bean problem when I decided to accept a list of files. I decided to create this question for those who are searching for solutions with related to a list of files

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