Angular 将数据和文件映像发送到后端

我无法将数据和图像从Angular UI发送到Spring Boot后端

我的HTML：

<input type="file" (change)="onFileSelected($event)">

<button type="button" (click)="onUpload()" class="file-input">sdadsa</button>

发送数据时，出现以下错误：

org.springframework.web.multipart.MultipartException: Current request is not a multipart request

---

将

'enctype'：'multipart/form data'

添加到http请求头中

var headers = new Headers();
headers.append('enctype', 'multipart/form-data' );

// HTTP POST using these headers
this.http.post(url, data, {headers: headers});

---

您在后端使用了nodejs吗？我使用了Spring Boot。我添加了这个，但没有帮助<代码>常量httpOptions={headers:newhttpheaders（{'enctype'：'multipart/formdata'}）@可注入（{providedIn:'root'}）导出类DataServiceService是否使用拦截器添加请求头？

@PostMapping
    @ResponseStatus(HttpStatus.OK)
    public void create(@RequestBody CategoryModel bike, @RequestParam("file") MultipartFile file) {


        String fileName = fileStorageService.storeFile(file);
        bike.setImagePath(fileName);
        categoryRepository.save(bike);
    }

org.springframework.web.multipart.MultipartException: Current request is not a multipart request

var headers = new Headers();
headers.append('enctype', 'multipart/form-data' );

// HTTP POST using these headers
this.http.post(url, data, {headers: headers});