Feign跨服務上傳文件

1.feign multipart 跨服務傳遞文件配置類（非全局配置）

public class FeignMultipartConfig {

    @Bean
    public Encoder multipartFormEncoder() {
        return new SpringFormEncoder(new SpringEncoder(new ObjectFactory<HttpMessageConverters>() {
            @Override
            public HttpMessageConverters getObject() throws BeansException {
                return new HttpMessageConverters(new RestTemplate().getMessageConverters());
            }
        }));
    }

}

2.文件服務feign client

@FeignClient(name = "msfileupload", decode404 = true,configuration = FeignMultipartConfig.class)
public interface MsFileUploadFeignApi {

    @RequestMapping(value = "/upload/single", method = RequestMethod.POST,  produces = {MediaType.APPLICATION_JSON_UTF8_VALUE}
            ,consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    UploadResponse singleUpload(@RequestParam("bizType") String bizType, @RequestPart("file") MultipartFile file);

    @RequestMapping(value = "/upload/multi", method = RequestMethod.POST,produces = {MediaType.APPLICATION_JSON_UTF8_VALUE}
            ,consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    BaseRestResponse multiUpload(@RequestParam("bizType") String bizType, @RequestPart("files") MultipartFile[] files);

}

3.當前服務暴露給外部的feign client

@FeignClient(name = "demoservice", url = "${demoservice.feign.url:}" , fallback = FileUploadCommonApiFallBack.class)
public interface FileUploadCommonApi {

    @RequestMapping(value = "/common/file/upload/single", method = RequestMethod.POST)
    UploadResponse singleUpload(@RequestParam("bizType") String bizType, @RequestParam("file") MultipartFile file);

    @RequestMapping(value = "/common/file/upload/multi", method = RequestMethod.POST)
    BaseRestResponse multiUpload(@RequestParam("bizType") String bizType
            , @RequestParam("files") MultipartFile[] files);

}

4.當前服務控制器代碼片段：

@Slf4j
@RestController("fileUploadCommonControllerV1")
@Api(value = "文件通用處理", tags= "文件上傳通用控制器")
public class FileUploadCommonController implements FileUploadCommonApi {

    @Autowired
    MsFileUploadFeignApi msFileUploadFeignApi;

    @ApiOperation(value = "單個文件上傳", notes = "單文件上傳")
    @Override
    public UploadResponse singleUpload(@RequestParam("bizType") String bizType
            , @RequestParam("file") MultipartFile file) {
        log.info("FileUploadCommonController.singleUpload ...");
        return msFileUploadFeignApi.singleUpload(bizType,file);
    }

    @ApiOperation(value = "多個文件上傳", notes = "多個文件上傳")
    @Override
    public BaseRestResponse multiUpload(@RequestParam("bizType") String bizType
            , @RequestParam("files") MultipartFile[] files) {
        log.info("FileUploadCommonController.multiUpload ...");
        return msFileUploadFeignApi.multiUpload(bizType,files);
    }

}