SpringCloud Feign报错： Method has too many Body parameters

桃扇骨 2022-05-10 08:28 169阅读 0赞

# 1、feign多参数问题 #

## 1.1GET方式 ##

**错误写法**

@RequestMapping(value="/test", method=RequestMethod.GET)  
    Model test(final String name,  final int age);

启动服务的时候，会报如下异常：

Caused by: java.lang.IllegalStateException: Method has too many Body parameters: public abstract com.chhliu.springboot.restful.vo.User com.chhliu.springboot.restful.feignclient.UserFeignClient.findByUsername(java.lang.String,java.lang.String)

异常原因：当使用Feign时，如果发送的是get请求，那么需要在请求参数前加上@RequestParam注解修饰，Controller里面可以不加该注解修饰。

**正确写法**

@RequestMapping(value="/test", method=RequestMethod.GET)  
    Model test(@RequestParam("name") final String name,@RequestParam("age")  final int age);

## 1.1POST方式 ##

**错误写法**

public int save(@RequestBody final Person p, @RequestBody final UserModel user);

feign中你可以有多个@RequestParam，但只能有不超过一个@RequestBody。

**正确写法**

public int save(@RequestBody final Person p,@RequestParam("userId") String userId,@RequestParam("userTel") String userTel);

补充：

如果消费者无法接收到参数；此时也需要家上@XXX 修饰

参考链接 [https://www.cnblogs.com/chenkeyu/p/8482276.html][https_www.cnblogs.com_chenkeyu_p_8482276.html]

对应问题1

Caused by: java.lang.IllegalStateException: Method has too many Body parameters: public abstract java.lang.String com.gla.datacenter.service.OrderClientService.getOrderInfoList(com.gla.datacenter.domain.OrderInfo,com.limp.framework.core.bean.Pager)
    	at feign.Util.checkState(Util.java:128) ~[feign-core-9.5.0.jar:na]
    	at feign.Contract$BaseContract.parseAndValidateMetadata(Contract.java:114) ~[feign-core-9.5.0.jar:na]
    	at org.springframework.cloud.netflix.feign.support.SpringMvcContract.parseAndValidateMetadata(SpringMvcContract.java:133) ~[spring-cloud-netflix-core-1.3.1.RELEASE.jar:1.3.1.RELEASE]
    	at feign.Contract$BaseContract.parseAndValidatateMetadata(Contract.java:64) ~[feign-core-9.5.0.jar:na]
    	at feign.ReflectiveFeign$ParseHandlersByName.apply(ReflectiveFeign.java:146) ~[feign-core-9.5.0.jar:na]
    	at feign.ReflectiveFeign.newInstance(ReflectiveFeign.java:53) ~[feign-core-9.5.0.jar:na]
    	at feign.Feign$Builder.target(Feign.java:218) ~[feign-core-9.5.0.jar:na]

[https_www.cnblogs.com_chenkeyu_p_8482276.html]: https://www.cnblogs.com/chenkeyu/p/8482276.html