使用Spring和AngularJS接收MultiPart文件和JSON数据

Question

Here's my controller below:

@RequestMapping(value="/upload", method=RequestMethod.PUT)
public ResponseEntity<String> handleFileUpload(
            @RequestParam("file") MultipartFile file,
            @RequestParam("data") String campaignJson,
            Principal principal) throws JsonParseException, JsonMappingException, IOException {

I want to be able to receive a MultipartFile as well as a JSON string containing data associated to the file (title, description, etc).

I can get MultipartFile uploading to work on it's own, and I can receive a JSON string and parse it on its own, but when I have them together in 1 controller, it fails. Whenever I print out the String campaignJson it says [object Object] instead of the data that I'm sending (when I print out the data being sent in angular, it's in correct JSON format.)

I've tried @RequestBody , @RequestParam , @RequestPart , but to no avail.

My question is: How do I receive both a MultipartFile and data in the form of JSON in one Spring controller?

Answer 1

This worked for me :

@RequestMapping(value = "/{id}/upload", method = RequestMethod.PUT)
public DocumentResource uploadPut(@PathVariable("id") Long id,
        MultipartHttpServletRequest request,
        HttpServletResponse response) {

        String next = request.getFileNames().next();
        MultipartFile file = request.getFile(next);
        ..... 
}

Edit : Using the MultipartHttpServletRequest should not limit you in any way to use other @PathVariables or @RequestParams , so passing title and description should be possible.

I used it to upload multiple images with AngularJS and FileUploader

( angular-file-upload v1.1.5 )

like this

 var uploader = new FileUploader({
        url: config.apiUrl('/machine/' + $scope.id + '/images/'),
        method: "post",
        queueLimit: maxFiles
    });