: was empty on parameter 0异常问题

Caused by: java.lang.IllegalStateException: RequestParam.value() was empty on parameter 0 at feign.Util.checkState(Util.java:128) at org.springframework.cloud.netflix.feign.annotation.RequestParamParameterProcessor.processArgument(RequestParamParameterProcessor.java:63) at org.springframework.cloud.netflix.feign.support.SpringMvcContract.processAnnotationsOnParameter(SpringMvcContract.java:238) at feign.Contract$BaseContract.parseAndValidateMetadata(Contract.java:107) at org.springframework.cloud.netflix.feign.support.SpringMvcContract.parseAndValidateMetadata(SpringMvcContract.java:133) at feign.Contract$BaseContract.parseAndValidatateMetadata(Contract.java:64) at feign.hystrix.HystrixDelegatingContract.parseAndValidatateMetadata(HystrixDelegatingContract.java:34) at feign.ReflectiveFeign$ParseHandlersByName.apply(ReflectiveFeign.java:146) at feign.ReflectiveFeign.newInstance(ReflectiveFeign.java:53) at feign.hystrix.HystrixFeign$Builder.target(HystrixFeign.java:59) at org.springframework.cloud.netflix.feign.HystrixTargeter.targetWithFallbackFactory(HystrixTargeter.java:78) at org.springframework.cloud.netflix.feign.HystrixTargeter.target(HystrixTargeter.java:53) at org.springframework.cloud.netflix.feign.FeignClientFactoryBean.loadBalance(FeignClientFactoryBean.java:145) at org.springframework.cloud.netflix.feign.FeignClientFactoryBean.getObject(FeignClientFactoryBean.java:166) at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:168) ... 42 common frames omitted