Failed to convert value of type 'org.springframework.web.multipart.commons.CommonsMultipartFile' to required type

Question

I have following controller method:

@RequestMapping(value = \"/owner/terminals/save\", method = RequestMethod.POST)
public String saveTerminal( @RequestParam         


        

Answer 1

As I commented you are making things too complex. Change your wrapper to the following (with the appropriate getters and setters).

public class OnlyForImagesFileWrapper {
    @Extensions(imageFormats = {".jpg",".png",".gif",".bmp"}, videoFormats = {})
    private MultipartFile file;
    private String name;
...
}

Then your controller method

@RequestMapping(value = "/owner/terminals/save", method = RequestMethod.POST)
public String saveTerminal( @ModelAttribute @Valid OnlyForImagesFileWrapper wrapper, BindingResult bindingResult ) { ... }

And of course in your configuration make sure you have a MultipartFileResolver configured to properly handle the MultipartFile argument as explained in the reference guide.