AngularJS 通过 Spring Restful 上传文件

总结一下，在写下这些文字之前心里很不爽，一个小问题倒腾了这么久...

 JS 端：

　　

// 指令
app.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]);
                    })
                })
            }
        }
    }])

// Service
app.service('fileUpload', ['$http', function($http) {
        this.uploadFile = function(file, url) {
            var fd = new FormData();
            fd.append('name', file.name);
            fd.append('file', file);

            $http.post(url, fd, {
                transformRequest: angular.identity,
                headers: {'Content-Type': undefined}
            })
            .success(function(data, status) {

            })
            .error(function(data, status) {

            })
        }
    }])

// Controller
app.controller('FileUploadModalCtrl', ['$scope', '$uibModalInstance', 'fileUpload', function($scope, $uibModalInstance, fileUpload) {

        $scope.ok = function() {
            var file = $scope.modelFile;
            console.log('file is ' + file);

            var uploadUrl = './api/file/upload';
            fileUpload.uploadFile(file, uploadUrl);

            $uibModalInstance.close($scope.items);
        };
        $scope.cancel = function() {
             $uibModalInstance.dismiss('cancel');
        }
    }]).controller('UploadCtrl', function($scope, $uibModalInstance, modelSrc, imgSrc) {
        $scope.model_src = modelSrc;
        $scope.img_src = imgSrc;

    });

<!-- HTML -->
<div class="form-group">
    <label for="inputFile">File Input</label>
    <input type="file" file-model="modelFile">
</div>

Spring 端

　import org.springframework.web.bind.annotation.RequestMapping;
　import org.springframework.web.bind.annotation.RequestMethod;
　import org.springframework.web.bind.annotation.RequestParam;
　import org.springframework.web.bind.annotation.RestController;
　import org.springframework.web.multipart.MultipartFile;

@RestController
@RequestMapping("file")
public class FileUploadService {

    @RequestMapping(method = RequestMethod.POST, value = "/upload")
    public String handleFileUpload(@RequestParam("name") String name, @RequestParam("file") MultipartFile file) {

        // todo what you want
    }
}

<!-- 这个千万别忘了，在spring配置文件里声明 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>

注释就不加了，下班了 :)