spring cloud：feign 使用form表单 POST数据

这是要调的接口： FelignClient 如下：

@Component
@FeignClient(value = "oms", url = "${rbox.after-sales-order.feign.url.oms}", fallback = AsOrderReasonFeignClientFallback.class, configuration = FeignClientFormPostConfig.class)
public interface AsOrderReasonFeignClient {

    @PostMapping(value = "/v0.2/as_aftersales/get_reason_address", consumes = {MediaType.MULTIPART_FORM_DATA_VALUE})
    ServerResponse getReasonAddress(Map<String, ?> userId);

}

注册FeignClientFormEncoderCofig 组件应用上下文：

@Component
public class FeignClientFormPostConfig {
    // 这里会由容器自动注入HttpMessageConverters的对象工厂
    @Autowired
    private ObjectFactory<HttpMessageConverters> messageConverters;

    /**
     * new一个form编码器，实现支持form表单提交
     */
    @Bean
    Encoder feignFormEncoder(ObjectFactory<HttpMessageConverters> converters) {
        return new SpringFormEncoder(new SpringEncoder(converters));
    }
}

添加依赖：

<dependency>
    <groupId>io.github.openfeign.form</groupId>
    <artifactId>feign-form</artifactId>
    <version>3.3.0</version>
</dependency>
<dependency>
    <groupId>io.github.openfeign.form</groupId>
    <artifactId>feign-form-spring</artifactId>
    <version>3.3.0</version>
</dependency>

注：

1. @PostMapping注解使用属性 consumes = {MediaType.MULTIPART_FORM_DATA_VALUE},
2. 参数使用Map<String, ?>形式 而不是@RequestParam(name = "user_id")Integer id 参考：