Spring Cloud OpenFeign MultipartException 上传文件异常

错误信息

错误一：MultipartException

MultipartException: Current request is not a multipart request

错误二：FileUploadException

FileUploadException: the request was rejected because no multipart boundary was found

错误三：FileNotFoundException

FileNotFoundException: MultipartFile resource [file] cannot be resolved to absolute file path

解决方法

FeignClient

设置consumes为multipart/form-data。

注意：MultipartFile需标注为@RequestPart，而不是@RequestParam。

@FeignClient(name = "file-upload", url = "${file-upload.url}")
public interface FileUploadFeignClient {

    @PostMapping(value = "/file/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    UploadResponse fileUpload(@RequestPart("file") MultipartFile file);

}

Controller

@RequestMapping("/file")
@RestController
public class FileUploadController {

    @PostMapping(value = "/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    public UploadResponse upload(@RequestPart("file") MultipartFile file) {
        // logic
        return UploadResponse.builder().build();
    }

}