SpringBoot FeignClient 方法参数过多

Question

我使用 spring-cloud 的 feignClient，当我的界面中有多个 Beans 参数时，就会出现问题，错误显示如下：

Caused by: java.lang.IllegalStateException: Method has too many Body parameters: public abstract com.wxl.pros.test.web.common.CommonResObject com.wxl.pros.test.web.feign.OrderFeignClient.createOrder(com.wxl.pros.test.services.form.order.CreateOrderForm,com.wxl.pros.test.services.vo.User)
    at feign.Util.checkState(Util.java:128)
    at feign.Contract$BaseContract.parseAndValidateMetadata(Contract.java:114)
    at org.springframework.cloud.netflix.feign.support.SpringMvcContract.parseAndValidateMetadata(SpringMvcContract.java:133)
    at feign.Contract$BaseContract.parseAndValidatateMetadata(Contract.java:64)
    at feign.hystrix.HystrixDelegatingContract.parseAndValidatateMetadata(HystrixDelegatingContract.java:34)
    at feign.ReflectiveFeign$ParseHandlersByName.apply(ReflectiveFeign.java:146)
    at feign.ReflectiveFeign.newInstance(ReflectiveFeign.java:53)
    at feign.Feign$Builder.target(Feign.java:209)
    at org.springframework.cloud.netflix.feign.HystrixTargeter.target(HystrixTargeter.java:48)
    at org.springframework.cloud.netflix.feign.FeignClientFactoryBean.getObject(FeignClientFactoryBean.java:184)
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:168)
    ... 27 common frames omitted

这是我的界面方法之一：

@RequestMapping(value="/order/createOrder",method=RequestMethod.POST)
    public CommonResObject createOrder(@RequestBody OrderForm orderForm,@RequestBody User user);

Answer 1

如果您有多个参数，其中一个请求正文和多个参数。使用精确注释指定参数类型：

ResponseMessage<String> getCustomInformation((@RequestBody CustomRequest request, @RequestParam("language") String language,
            @RequestParam("channel") String channel, @RequestParam("requestId") String requestId

Answer 2

您可以将它们放在第三个 pojo 中：

public class Order {
     OrderForm orderForm;
     User user;
     public Order(@JsonProperty("orderForm") orderForm, @JsonProperty("user") User user) {
         this.orderForm = orderForm;
         this.user = user;
     }
}

然后你的 API 就变成这样：

@RequestMapping(value="/order/createOrder",method=RequestMethod.POST)
public CommonResObject createOrder(@RequestBody Order order);

Answer 3

@RequestBody 只能存在一个。如果有多个对象需要传输，可以使用json来合并多个对象。

Answer 4

无论如何都可以在编译时验证合约