Angulal-Spring：如何将文件+json对象传递给WS？

Question

在angular方面，我传递我的file+json对象：

const formData: FormData = new FormData();
formData.append('fabricDTO', JSON.stringify(classToPlain(fabric)));
formData.append('file', picture);
return this.http.Post(this.SAVE_FABRIC_URL, formData)

@RestController
@RequestMapping(value = "fabric")
public class FabricController {

    @Autowired
    IFabricService fabricService;


    @PreAuthorize("#oauth2.hasScope('foo') and #oauth2.hasScope('read')")
    @RequestMapping(method = RequestMethod.GET)
    public ResponseEntity<Collection<FabricDTO>> getUserFabrics() {
        ...
    }

    @PreAuthorize("#oauth2.hasScope('foo') and #oauth2.hasScope('read')")
    @RequestMapping(method = RequestMethod.POST)
    public ResponseEntity saveUserFabrics(@RequestBody FabricDTO fabricDTO, 
            @RequestParam("file") MultipartFile file) {
    ...
    }

}

@Bean(name = "multipartResolver")
    public CommonsMultipartResolver multipartResolver() {
        CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();
        multipartResolver.setMaxUploadSize(1000000);
        return multipartResolver;
    }

这是我在chrome控制台中看到的，在表单数据中：

fabricDTO: {"fabricTypeId":4,"comment":"sdf"}
file: (binary)

FabricDTO是：

private int id;
private float length;
private String comment;
private int fabricTypeId;

但当我发送呼叫WS时,我得到了错误：

如果我不在formData中添加DTO而在controller中注释“@RequestBody FabricDTO FabricDTO”，我就能够获得该文件。

THX

Answer 1

尝试使用@RequestPart

@ResponseBody
public ResponseEntity saveUserFabrics(@RequestPart FabricDTO fabricDTO, 
    @RequestPart MultipartFile file) { //Do your magic here }

正如这里的同行们所做的：我们可以在Spring中一起使用multipart和@requestbody吗？