您好，我是使用Spring Boot和AngularJs编写Web应用程序的，需要简单的文件上传，目前无法正常工作。

我已经读过，当存在mvc依赖项时，spring
boot应该会自动配置分段上传。来自：https :
//spring.io/guides/gs/uploading-
files/

作为自动配置Spring MVC的一部分，Spring Boot将创建一个MultipartConfigElement Bean，并准备好进行文件上传。

发送请求的Javascript函数：

var postFormData = function (file, url, successCallback, errorCallback, progressCallback) {
    var xhr = new XMLHttpRequest(),
        formData = new FormData();

    formData.append("file", file);

    xhr.onreadystatechange = function () {
        if (xhr.readyState === 4) {
            if (xhr.status === 200) {
                successCallback(xhr.status); //File is Uploaded
            } else {
                errorCallback(xhr.status);
            }
        }
    };

    function progress(evt) {
        if (evt.lengthComputable) {
            var percentComplete = evt.loaded / evt.total;
            progressCallback(percentComplete);
        } else {
            progressCallback(evt.loaded);
        }
    }

    xhr.open("POST", url, true);

    //xhr.setRequestHeader("Content-Type", "multipart/form-data");

    xhr.addEventListener("progress", progress, false);

    xhr.send(formData);
}

我的主应用程序类中的多部分配置Bean：

 @Bean
    MultipartConfigElement multipartConfigElement() {
        MultipartConfigFactory factory = new MultipartConfigFactory();
        factory.setMaxFileSize(MAXIMUM_FILE_SIZE);
        factory.setMaxRequestSize(MAXIMUM_FILE_SIZE);
        return factory.createMultipartConfig();
    }

上传控制器：

@Controller
@RequestMapping("/api")
public class FileUploadController {

        @Autowired
        UserRepository userRepository;

        @Autowired
        VolumeMetaRepository volumeMetaRepository;

        /**
         * Handles File upload of volumedata
         *
         * @param file Must not be null
         **/
        @RequestMapping(value = "/volumedata/meta/test", consumes= "multipart/form-data", method=RequestMethod.POST)
        @ResponseBody
        public void handleFileUpload(
                @RequestParam("file") MultipartFile file) {

            if (!file.isEmpty()) {
               /* try {
                    InputStream fileStream = file.getInputStream();
                    OutputStream out = new FileOutputStream(file.getOriginalFilename());
                    IOUtils.copy(fileStream, out);
                } catch (IOException e) {
                    throw new IllegalStateException("Error uploading file.", e);
                }*/

/*                String filePath = request.getServletContext().getRealPath("/");
                try {
                    file.transferTo(new File(filePath+ "/"  + file.getOriginalFilename()));
                } catch (IOException e) {
                    e.printStackTrace();
                }*/
            }
        }

而且由于还有其他Stackoverflow线程是新的Spring引导版本，使用‘1.2.2.BUILD-
SNAPSHOT’解决了Im问题，因此我的gradle依赖项：

version = '1.2.2.BUILD-SNAPSHOT'
dependencies {
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-web', version:version
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-aop', version:version
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-jpa', version:version
    compile group: 'org.springframework.hateoas', name: 'spring-hateoas', version:'0.16.0.RELEASE'
    compile group: 'org.springframework.data', name: 'spring-data-rest-webmvc', version:'2.1.4.RELEASE'
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-security', version:version
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-rest', version:version
    compile group: 'commons-io', name: 'commons-io', version:'2.1'
    compile group: 'com.fasterxml.jackson.datatype', name: 'jackson-datatype-jsr310', version:'2.3.4'
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-integration', version:version
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-websocket', version:version
    compile group: 'org.springframework.session', name: 'spring-session', version:'1.0.0.BUILD-SNAPSHOT'
    compile group: 'org.springframework.data', name: 'spring-data-redis', version:'1.4.1.RELEASE'
    compile group: 'redis.clients', name: 'jedis', version:'2.4.2'
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-remote-shell', version:version
    compile group:'com.google.guava', name:'guava', version:'18.0'

    compile files ('lib/vendor/niftijio.jar');

    compile("com.h2database:h2")

    testCompile(group: 'org.springframework.boot', name: 'spring-boot-starter-test', version:'1.1.6.RELEASE') {
        exclude(module: 'commons-logging')
    }

    testCompile group: 'com.jayway.jsonpath', name: 'json-path', version:'0.9.1'
    testCompile 'org.springframework:spring-test:3.2.3.RELEASE'
    testCompile 'junit:junit:4.+'
    testCompile "org.mockito:mockito-all:1.9.5"
}

引发的错误是：

{
  "timestamp" : "2015-01-19T10:22:53.710Z",
  "status" : 400,
  "error" : "Bad Request",
  "exception" : "org.springframework.web.bind.MissingServletRequestParameterException",
  "message" : "Required MultipartFile parameter 'file' is not present",
  "path" : "/api/volumedata/meta/test"
}

它告诉我“ file”参数不存在，但是我的请求有效负载显示该参数在那里。

Request Payload:
------WebKitFormBoundary40qPAhpvA20pd8V1
Content-Disposition: form-data; name="file"

C:\fakepath\test.gz
------WebKitFormBoundary40qPAhpvA20pd8V1--

有人知道我的配置中缺少什么，或者什么会导致错误？

提前致谢