Spring 依赖注入问题

Question

我现在用Spring MVC 的拦截器，准备拦截登录的用户信息等内容，现在在拦截器中和controller中注入用户信息管理类时候报错，先贴异常：
 org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'HomeController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.hp.ott2.session.UserSessionInfoManagerInterface com.hp.ott2.web.HomeController.mgr; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.hp.ott2.session.UserSessionInfoManagerInterface] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.hp.ott2.session.UserSessionInfoManagerInterface com.hp.ott2.web.HomeController.mgr; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.hp.ott2.session.UserSessionInfoManagerInterface] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:502)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:84)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:282)
... 76 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.hp.ott2.session.UserSessionInfoManagerInterface] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:920)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:789)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:703)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:474)
... 78 more

Answer 1

我的配置文件：
<mvc:interceptors>
     <bean class="com.hp.ott2.web.interceptor.SiteMinderInterceptor" /> 
</mvc:interceptors>

<bean id="userSessionInfo" class="com.hp.ott2.session.UserSessionInfo">
<aop:scoped-proxy/>
</bean>

<bean id="userSessionInfoManager" class="com.hp.ott2.session.UserSessionInfoManager">
<property name="userInfo" ref="userSessionInfo" />
</bean>

Answer 2

我的拦截器；
public class SiteMinderInterceptor extends HandlerInterceptorAdapter {

private static final Logger logger = LoggerFactory.getLogger(SiteMinderInterceptor.class);

@Autowired
private UserSessionInfoManager mgr;

//before the actual handler will be executed
@SuppressWarnings("unchecked")
public boolean preHandle(HttpServletRequest request, 
HttpServletResponse response, Object handler)
    throws Exception {

logger.info("sm called: "+ request.getHeader("ntuserdomainid"));
logger.info("sm called: "+ request.getHeader("sm_authorized"));
logger.info("sm called: "+ request.getHeader("sm_authentic"));
logger.info("sm called: "+ request.getHeader("sn"));
logger.info("sm called: "+ request.getHeader("givenname"));
logger.info("sm called: "+ request.getHeader("uid"));
logger.info("sm called: "+ request.getHeader("employeename"));

// for now just return true and allow controller to be called. 
// note: if false is returned the execution chain is stopped and controller will
//       not be called. A redirect is possible by calling:
//       response.sendRedirect("<insert_page_name_here>");
//       return false

// check if user info is already stored:
if(mgr.getUserInfo().getEmployee_no() == null) {
mgr.getUserInfo().setEmployee_no(request.getHeader("employeename"));
mgr.getUserInfo().setNtuserdomainid(request.getHeader("ntuserdomainid"));
mgr.getUserInfo().setSm_authentic((request.getHeader("sm_authentic")!=null ? true:false));
mgr.getUserInfo().setSm_authorized((request.getHeader("sm_authorized")!=null ? true:false));
mgr.getUserInfo().setSn(request.getHeader("sn"));
mgr.getUserInfo().setUid(request.getHeader("uid"));
mgr.getUserInfo().setGiven_name(request.getHeader("givenname"));
}

//for now just allow pass-through to controllers
return true;
}
}

Answer 3

我的用户信息管理类：
public class UserSessionInfoManager { private UserSessionInfo userInfo; public UserSessionInfo getUserInfo() {
return userInfo;
} public void setUserInfo(UserSessionInfo userInfo) {
this.userInfo = userInfo;
}
}

Answer 4

 Could not autowire field: private com.hp.ott2.session.UserSessionInfoManagerInterface com.hp.ott2.web.HomeController.mgr; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.hp.ott2.session.UserSessionInfoManagerInterface] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
信息很明确，autowire时候出问题了，检查一下类里面的属性名称以及配置里面的bean是否对应的上