Java 角度5+；Spring启动映像上载

我正在尝试上传一个从angular到spring boot rest的图像。但它会抛出

org.springframework.web.multipart.MultipartException: Current request is not a multipart request
    at org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.handleMissingValue(RequestParamMethodArgumentResolver.java:190) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

我对这两种技术都是新手。帮我上传文件

这是代码

RestController

public ResponseMessage addUser(@RequestParam("profileImage") MultipartFile profileImage,
    @RequestParam("user") User user) {

try {
    if (userService.doesUserExist(user.getUsername())) {
    return new ResponseMessage("The username is not available; please choose a different username", 200);
    }
} catch (Exception e) {
    System.out.println(e.getMessage());
}
String extension = FilenameUtils.getExtension(profileImage.getOriginalFilename());
storageService.storeFile(profileImage, user.getUsername() + "." + extension, profilePicturePath);
user.setProfilePicturePath(profilePicturePath + "/" + user.getUsername() + "." + extension);
userService.addUser(user);

return new ResponseMessage(user.getUsername() + " was added successfully!", 200);
}

角度服务

addUser(user:User,profileImage:File){
      const formData:FormData = new FormData();

     formData.append('profileImage', profileImage);
     formData.append('user',JSON.parse(JSON.stringify(user)));

     return this.http.post<ResponseMessage>("/api/admin/user/new_user",formData,this.postHttpOptions);

    }

<input type='file' id="imgInp" (change)="setImage($event.target.files)" />

角度模板

addUser(user:User,profileImage:File){
      const formData:FormData = new FormData();

     formData.append('profileImage', profileImage);
     formData.append('user',JSON.parse(JSON.stringify(user)));

     return this.http.post<ResponseMessage>("/api/admin/user/new_user",formData,this.postHttpOptions);

    }

<input type='file' id="imgInp" (change)="setImage($event.target.files)" />

我明白了

我所做的改变

我添加了@Requestpart而不是@RequestParam

我添加了@RequestPart字符串用户，而不是@RequestParam用户用户；然后使用ObjectMapper将字符串转换为用户

在客户端，我删除了'ContentType=application/Json'，没有提到任何内容类型

这是密码

public String addUser(@RequestPart("profileImage") MultipartFile profileImage,
        @RequestPart("user") String userString) throws JsonParseException, JsonMappingException, IOException {

    User user = new ObjectMapper().readValue(userString, User.class);
}

---

plz共享完整的堆栈跟踪，以及从angular请求的

curl