弹簧引导：所需的请求部分不存在'file'

Question

我要上传图片时收到错误 Required request part 'file' is not present。
我打算上传视频和图像。视频上传效果很好，但图像无法正常工作。
这是我的代码。

Spring-boot

  @ApiOperation(value = "Post new file")
  @RequestMapping(value = "/", method = RequestMethod.POST)
  public String handleFileUpload(@RequestParam("file") MultipartFile file,
                                 @RequestParam (value = "accesstoken", required = true) String accessToken,
                                 RedirectAttributes redirectAttributes) throws Exception{
      tokenService.verifyAdmin(accessToken);
      storageService.store(file);
      return "You successfully uploaded " + file.getOriginalFilename() + "!";
  }

Storageservice.store

  @Override
  public void store(MultipartFile file) {
      try {
          if (file.isEmpty()) {
            throw new StorageException("Failed to store empty file " + file.getOriginalFilename());
           }
           Files.copy(file.getInputStream(), this.rootLocation.resolve(file.getOriginalFilename()));
      } catch (IOException e) {
  throw new StorageException("Failed to store file " + file.getOriginalFilename(), e);
     }
  }

html-图像上传

<div class="control-group">
    <label class="control-label" for="date01">Cover Image</label>
    <div class="controls">
        <button class="btn-primary" name="file" ngf-pattern="'image/*'" ngf-accept="'image/*'" ngf-max-size="2MB" ngf-select="ctrl.uploadCoverImageFile($file)">Upload</button>
    </div>
</div>

html-视频上传

<div class="control-group">
    <label class="control-label" for="date01">Upload video</label>
    <div class="controls">
        <button class="btn-primary" ngf-select="ctrl.uploadVideoFile($file)">Upload</button>
    </div>
</div>

控制器

self.uploadCoverImageFile = function(file){
     self.upload(file,-1);
};
self.uploadVideoFile = function(file){
    self.upload(file,1);
};
self.upload = function (file,x) {
    fileUploadService.uploadFile(file).then(function (resp) {
        console.log('Success ' + resp.config.data.file.name + 'uploaded. Response: ' + resp.data);
    }, function (resp) {
        console.log('Error status: ' + resp);
    }, function (evt) {
        if(x > 0)
            self.videoUploadProgress = parseInt(100.0 * evt.loaded / evt.total);
        else
            self.coverimageUploadProgress = parseInt(100.0 * evt.loaded / evt.total);
    });
};

fileuploadservice.uploadfile

//ng-file-upload: [https://github.com/danialfarid/ng-file-upload]
uploadFile: function(file){
        return Upload.upload({
            url: baseEndPoint + '/',
            data: {file: file, accesstoken: userService.accesstoken}
        });
    },

config.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="500000000000"/>
    </bean>
</beans>

appconfig.java

@ImportResource("classpath:/vod/config/config.xml")
@Configuration
public class AppConfig {
}

Answer 1

想想启用 multipart：我遇到了同样的问题，我刚刚在.properties文件中添加了以下属性：

multipart.enabled=true