【报错】Error creating bean with name 'userController'

报错信息：
Error creating bean with name ‘userController’: Unsatisfied dependency expressed through field ‘userService’;
nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException:
No qualifying bean of type ‘com.boron.service.UserService’ available: expected at least 1 bean which qualifies as autowire candidate.
……

参照网上的资料，检查我的配置，发现

控制层调用业务层，在业务层我加了@Service注解：

@Service("userService");

控制层注入业务层也加了@Resource注解：

@Resource
private UserService userService;

最后发现我的web.XML没有加下面这段代码

   
    <listener>  
        <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>  
    listener>