在Spring MVC中使用不带表单的Multipart

我的方法存在问题：

我为MultiPartResolver创建了一个bean。解决问题后的理解是，仅当你需要特定类型的文件或非常特定于应用程序的文件时，才定义此bean。尽管我希望对此有更多了解，并希望能从stackoverflow的技术人员那里听到。

当前问题的解决方案：

我会给出我的源代码，

HTML：

<div ng-controller="myCtrl">        <input type="file" file-model="myFile" />        <button ng-click="uploadFile()">upload me</button>    </div>

AngularJS：

     var myApp = angular.module('myApp', []);        myApp.directive('fileModel', ['$parse', function ($parse) { return {     restrict: 'A',     link: function(scope, element, attrs) {         var model = $parse(attrs.fileModel);         var modelSetter = model.assign;         element.bind('change', function(){  scope.$apply(function(){      modelSetter(scope, element[0].files[0]);  });         });     } };        }]);        myApp.controller('myCtrl', ['$scope', '$http', function($scope, $http){ $scope.uploadFile = function(){     var file = $scope.myFile;     var fd = new FormData();     fd.append('file', file);    //We can send anything in name parameter, //it is hard pred to abc as it is irrelavant in this case.     var uploadUrl = "/upload?name=abc";     $http.post(uploadUrl, fd, {         transformRequest: angular.identity,         headers: {'Content-Type': undefined}     })     .success(function(){     })     .error(function(){     }); }        }]);

spring：

@RequestMapping(value="/upload", method=RequestMethod.POST)    public String handleFileUpload(@RequestParam("name") String name, @RequestParam("file") MultipartFile file){        if (!file.isEmpty()) { try {     byte[] bytes = file.getBytes();     BufferedOutputStream stream =  new BufferedOutputStream(new FileOutputStream(new File(name)));     stream.write(bytes);     stream.close();     return "You successfully uploaded " + name + "!"; } catch (Exception e) {     return "You failed to upload " + name + " => " + e.getMessage(); }        } else { return "You failed to upload " + name + " because the file was empty.";        }    }

@arahant即使发送请求时在请求有效负载中没有看到任何文档base64内容，Angular也会发送MultiPartFile。