java异常之-Caused by: java.lang.IllegalStateException: Method has too many Body parameters

错误提示信息

异常： java.lang.IllegalStateException: Method has too many Body parameters
翻译：java.lang.IllegalStateException：方法具有太多的Body参数

Caused by: java.lang.IllegalStateException: Method has too many Body parameters: public abstract com.faw.app.parking.domain.vo.TspResultVO com.faw.app.parking.service.feign.TspBasicInfoFeign.isOwner(java.lang.Long,java.lang.String)
	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$ParseHandlersByName.apply(ReflectiveFeign.java:146)
	at feign.ReflectiveFeign.newInstance(ReflectiveFeign.java:53)
	at feign.hystrix.HystrixFeign$Builder.target(HystrixFeign.java:58)
	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:170)
	... 72 common frames omitted

解决方案：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。

@GetMapping("/basicinfo/user/isOwnerByUserIdAndVin")
TspResultVO<Boolean> isOwner(@RequestParam("userId") Long userId, @RequestParam("vin") String vin);

这个Spring底层校验有点恶心，目前不知道为啥要这样做，不过用别人的东西就得按照别人的规则来，需要注意@RequestParam注解中必须给value值不给会出现另外的异常。

Caused by: java.lang.IllegalStateException: RequestParam.value() was empty on parameter 0

这种应该底层就是这么校验的，无需多做解释，这样来就行了。