javascript - How to upload multiple images and object data in Angular js to Spring Controller -

request multipart file angular js not getting mapped spring controller request parameter file.

my angular js code uplaod multiple images , object data looks below angular js controller:

                  adminservice.addimage($scope.gallery,                                    $scope.logo.image).then(function(success) {                          alertservice.alert("addded successfully")                          $scope.back();                          $scope.isloading = false;                      } 

service js file

    adminserv.addimage= function(obj, file) {          var deferred = $q.defer();                     var formdata = new formdata();                     formdata.append("advertisementrequestjson", json.stringify(obj));                     formdata.append("files", file);                     $http.post(app_config.api_url + 'api/saveadvertisementdetails', formdata, {                         transformrequest: angular.identity,                         headers: {                             'content-type': undefined                         }                     }).then(function(data) {                         deferred.resolve(data);                     }, function(error) {                         deferred.reject(error);                     });                     return deferred.promise;                 }; 

html code is

         <input required name="name" ng-model="gallery.galleryname">          <input type="file" ngf-select ng-model="logo.image" ngf-max-size="20mb"                                          name="file" accept="image/*" aria-label="logo" ngf-multiple="true">  

spring controller code :

        public @responsebody commonresponsedto savegallery(                     @requestparam(value = "file", required = false) multipartfile file,                      @requestparam(value = "requestjson", required = true) string requestjson){                  gallerydto gallerydto = new gallerydto();                 gallerydto.setmultipartfiles(file);                 gallerydto.setrequestjson(requestjson);                 return galleryservice.savegallery(gallerydto);