具有零参数的角4多部分形式

Question

大家好，我有一个问题，在张贴一个多部分的表单-数据的角4.3 + Spring应用程序。无论我在Java方法中作为参数放置什么，我都会得到消息"Required request part 'arquivo‘是不存在的“或者”必需的请求参数'arquivo’不存在“。

以下是表单代码的一部分：

<form (ngSubmit)="onFormSubmit()" [formGroup]="formulario" enctype="multipart/form-data">
          <div formGroupName="sumarizacao">
            <div class="row">

       <!-- Nome da sumarização -->
              <div class="form-group col-sm-3">
                <label for="summarizationName">*Nome da Sumarização</label>
                <input type="text" class="form-control" id="summarizationName" formControlName="nome" placeholder="Nome">
                <div *ngIf="formulario.controls['sumarizacao'].controls['nome'].errors && formulario.controls['sumarizacao'].controls['nome'].dirty"><small> Campo obrigatório</small></div>
              </div>

  <!-- control file upload -->
            <div class="form-group col-sm-9">
              <label class="form-control-label custom-submit" id="controlFileLabel" for="envio-arquivo-ctl">Arquivo de controle</label>
              <i class="fa fa-check-circle" aria-hidden="true" *ngIf="file != null"></i>
              <div>
                <input type="file" id="envio-arquivo-ctl" (change)="fileEvent($event)" accept=".ctl">
                <div *ngIf="file != null"><p>{{file.name}}</p></div>
                <div *ngIf="formulario.controls['arquivo'].name != '' && formulario.controls['arquivo'].dirty"><small> Campo obrigatório</small></div>
              </div>
            </div>
         </div>
          <button type="submit" class="btn btn-sm btn-primary" [disabled]="formulario.invalid"><i class="fa fa-check" aria-hidden="true"></i> Gravar</button>
          <button type="reset" class="btn btn-sm btn-danger"><i class="fa fa-ban"></i> Resetar</button>
        </form>

邮政法：

  salvarSumarizacao(formGroup: FormGroup): Observable<Sumarizacao> {
    let formData = new FormData();
    let header = new HttpHeaders().set('enctype', 'multipart/form-data').set('Accept', 'application/json');
    formData.append('sumarizacao', JSON.stringify(formGroup.value.sumarizacao));
    if (formGroup.value.arquivo !== '') {
      formData.append('arquivo', formGroup.value.arquivo, formGroup.value.arquivo.name);
    }
    return this.http.post(URIConstantes.SUMARIZACAO, formData, { headers: header })
      .map(resp => resp as Sumarizacao)
      .catch(this.handleErrorObservable)
  }

当我打印formData或formGroup时，它看起来很好，所有的数据都在那里，但是当它到达后端时，它就崩溃了。

 @PostMapping(consumes = MediaType.MULTIPART_FORM_DATA)
    @Produces({MediaType.APPLICATION_JSON})
    public Response incluir(@RequestParam(value="arquivo") MultipartFile arquivo, @RequestParam(value = "sumarizacao") Sumarizacao sumarizacao, HttpServletRequest request) {
        ObjectMapper mapper = new ObjectMapper();
        //sumarizacao = mapper.readValue(request.getParameter("sumarizacao"), Sumarizacao.class);
        //Sumarizacao sumRetorno = sumarizacaoService.incluir(sumarizacao, arquivo.getInputStream());
        RetornoResourceDTO<Sumarizacao> retornoResourceDTO = RetornoResourceDTO.<Sumarizacao> criarComResultado(new Sumarizacao());
        adicionarMensagemSucesso(retornoResourceDTO);
        return Response.ok(retornoResourceDTO).build();

    }

• 当我将HttpServletRequest作为参数时，它给出了空multiPartfiles和MultipartParametersName
• 当我放置参数(@RequestBody字符串测试)时，“test”字符串将给出整个请求主体(所有表单数据和文件数据都是字符串，包括边界)。
• 当我发布到http://httpbin.org/post时，它可以工作，我得到的响应是：在这里输入图像描述

我尝试过使用@RequestPart，@RequestParam，在这两种情况下，它都显示了“必需的param/部件不存在”。我还尝试使用@FormDataParam，对象为null。:(

Answer 1

我让它使用MultipartHttpServletRequest参数和CommonMultipartResolver bean。

    @Bean
    public CommonsMultipartResolver commonsMultipartResolver() {
        final CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver();
        commonsMultipartResolver.setMaxUploadSize(-1);
        return commonsMultipartResolver;
    }


@PostMapping(consumes = MediaType.MULTIPART_FORM_DATA, produces = MediaType.APPLICATION_JSON)
    public Response incluir(MultipartHttpServletRequest http) { }

我使用SpringBoot1.5.3、SpringSecurity3.2.10和Spring 4.3.8