org.springframework.beans.factory.UnsatisfiedDependencyException

springboot整合feign时报错

报错信息如下（截取前段部分信息）

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'reportController': Unsatisfied dependency expressed through field 'reportService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'reportServiceImpl': Unsatisfied dependency expressed through field 'uiasUserController'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cn.net.topnet.base.UiasUserController': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalStateException: Method has too many Body parameters: public abstract java.util.Map cn.net.topnet.base.UiasUserController.getMsgByUserId(java.lang.String,java.lang.String)
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:598)
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:376)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:847)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:744)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:391)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:312)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204)
	at cn.net.topnet.ReportApplication.main(ReportApplication.java:24)

主要部分

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'reportController': Unsatisfied dependency expressed through field 'reportService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'reportServiceImpl': Unsatisfied dependency expressed through field 'uiasUserController'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cn.net.topnet.base.UiasUserController': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalStateException: Method has too many Body parameters: public abstract java.util.Map cn.net.topnet.base.UiasUserController.getMsgByUserId(java.lang.String,java.lang.String)

经查询，定义的feigin接口类如下

@FeignClient(value = "uias")
public interface UiasUserController {

    @GetMapping(value = "/uias/user/getMsgByUserId")
    Map getMsgByUserId(@Param("userId")String userId, @Param("postId")String postId);
}

在参数定义方面使用的@Param注解，修改为@RequestParam修改后

@FeignClient(value = "uias")
public interface UiasUserController {

    @GetMapping(value = "/uias/user/getMsgByUserId")
    Map getMsgByUserId(@RequestParam("userId")String userId, @RequestParam("postId")String postId);
}

查询相关博客，获得解释为

@RequestParam 用于controller层
（1）解决前台参数名称与后台接收参数变量名称不一致的问题，等价于request.getParam
（2）可设置value：指定参数名 default：指定变量初始值 require（true默认/false）:指定参数是否为必传

@Param 用于dao层
个人理解为修饰参数，使得mapper.xml中的参数与后台的参数对应上，也增强了可读性
如果两者参数名一致得话，spring会自动进行封装，不一致的时候就需要手动去使其对应上。

看了下注解源码，两种注解的接口类有所区别，限于水平有限，暂不做深入研究，如有道友指教一二，在下不胜感激涕零

---

CosmosRay
cosmosray@aliyun.com 　  CSDN博客 　  格言：能力是金钱的另一种保存方式 　  版权声明：本文为博主原创文章，如需转载请注明出处