feign调用 is not a type supported by this encoder

@FeignClient(value = "xxx(注：微服务名字)", configuration = {OssClient.MultipartSupportConfig.class,OssClient.MessageConfiguration.class})
@Service
public interface OssClient
{
    @PostMapping(value = "xxx(注：url地址)", consumes = MediaType.MULTIPART_FORM_DATA_VALUE(注：这个要加上))
    String uploadFile(@RequestPart("file") MultipartFile file);
    
    @PostMapping(value = "xxx(注：url地址)", consumes = MediaType.APPLICATION_JSON_VALUE(注：这个要加上))
 	String xxxxx(@RequestBody Params params);
	
	/**
     * 上面的configuration要用，这个encoder是用于上传MultipartFile的
     *
	class MultipartSupportConfig
    {
        @Bean
        public Encoder feignFormEncoder()
        {
            return new SpringFormEncoder();
        }
    }

	/**
     * 上面的configuration要用，这个encoder是用于这个class下还有其他的接口调用但不是用于上传MultipartFile接口的
     *
    class MessageConfiguration
    {
        @Bean
        Encoder feignFormEncoder(ObjectFactory converters)
        {
            return new SpringFormEncoder(new SpringEncoder(converters));
        }
    }
}