SpringCloud Feign报错：java.lang.IllegalStateException: Method has too many Body parameters

1、报错信息

错误日志内容为：

Caused by: java.lang.IllegalStateException: Method has too many Body parameters: public abstract com.soft.framework.core.response.CommResponse com.soft.back.openplatform.api.AdvertApi.insertAdvertTactics(com.soft.back.openplatform.model.AdvertTactics,java.lang.String)
	at feign.Util.checkState(Util.java:127)
	at feign.Contract$BaseContract.parseAndValidateMetadata(Contract.java:117)
	at org.springframework.cloud.openfeign.support.SpringMvcContract.parseAndValidateMetadata(SpringMvcContract.java:188)
	at feign.Contract$BaseContract.parseAndValidatateMetadata(Contract.java:66)
	at feign.hystrix.HystrixDelegatingContract.parseAndValidatateMetadata(HystrixDelegatingContract.java:46)
	at feign.ReflectiveFeign$ParseHandlersByName.apply(ReflectiveFeign.java:154)
	at feign.ReflectiveFeign.newInstance(ReflectiveFeign.java:52)
	at feign.hystrix.HystrixFeign$Builder.target(HystrixFeign.java:70)
	at org.springframework.cloud.openfeign.HystrixTargeter.targetWithFallbackFactory(HystrixTargeter.java:64)
	at org.springframework.cloud.openfeign.HystrixTargeter.target(HystrixTargeter.java:51)
	at org.springframework.cloud.openfeign.FeignClientFactoryBean.loadBalance(FeignClientFactoryBean.java:238)
	at org.springframework.cloud.openfeign.FeignClientFactoryBean.getTarget(FeignClientFactoryBean.java:267)
	at org.springframework.cloud.openfeign.FeignClientFactoryBean.getObject(FeignClientFactoryBean.java:247)
	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:171)
	... 43 common frames omitted

2、feign多参数问题

1.1 POST方式

错误写法

public int save(@RequestBody Person p, @RequestBody UserModel user);
@ApiOperation("保存策略型号关系")
@PostMapping("/openapi/tactics/insertTacticsModel")
public CommResponse<?> insertTacticsModel(@RequestBody TacticsModel tm, @RequestBody("tacticsId") Integer tacticsId){}

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

正确写法

@ApiOperation("保存策略型号关系")
@PostMapping("/openapi/tactics/insertTacticsModel")
public CommResponse<?> insertTacticsModel(@RequestBody TacticsModel tm, @RequestParam("tacticsId") Integer tacticsId, @RequestParam("modelIds") String modelIds){}

1.2 GET方式

错误写法

@RequestMapping(value="/test", method=RequestMethod.GET)
public Model test(String name, 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.soft.framework.core.response.CommResponse com.soft.back.openplatform.api.AdvertApi.insertAdvertTactics(com.soft.back.openplatform.model.AdvertTactics,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)
public Model test(@RequestParam("name") String name, @RequestParam("age") int age){}