angularjs - Angular - file upload request, adding @RequestParam -

i want add @requestparam http request match spring mvc @requestparam.

how can add file upload request:

/* @param file - file input  @param uploadurl - url */          this.uploadfiletourl = function(file, uploadurl){                 var fd = new formdata();                 //add file formdata                 fd.append(file.name, file);                 //send request                 $http.post(uploadurl, fd,  {                     transformrequest: angular.identity,                     headers: {'content-type': undefined}                 })                 .success(function(result){                     console.log(result);                 })                 .error(function(err){                     console.log(err);                 });             } 

in backend error required string parameter 'filename' not present here spring mvc controller (only header part):

@controller @requestmapping("/file") public class fileuploadcontroller {     /**      * upload single file using spring controller      */     @requestmapping(value = "/uploadfile", method = requestmethod.post)     public @responsebody string uploadfilehandler(@requestparam("filename") string filename, @requestparam("file") multipartfile file) { //rest of function 

}

so append param formdata:

fd.append('file', file); fd.append('filename', file.name); 

match @requestparam's.

thanks.