解决在spring配置文件中包扫描无效问题

自己写的一个小项目，用的框架ssm整合，里面明明配置了包扫描，但是就出现了这个异常

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'adminPersonController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.drs.service.impl.AdministratorService com.drs.controller.AdminPersonController.administratorService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.drs.service.impl.AdministratorService] 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)}

大概意思bean的创建出了问题，自动注入找不到Service层的东西，首先展示一下我的配置文件

web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
  <display-name>diving-school</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <filter>
  <filter-name>CharacterEncodingFilter</filter-name>
  <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
  <init-param>
  <param-name>encoding</param-name>
  <param-value>utf-8</param-value>
  </init-param>
  </filter>
  <filter-mapping>
  <filter-name>CharacterEncodingFilter</filter-name>
  <url-pattern>/*</url-pattern>
  </filter-mapping>

<!--加载spring容器配置文件-->
  <context-param>
	<param-name>contextConfigLocation</param-name>
	<param-value>classpath:spring/applicationContext-*.xml</param-value>
  </context-param>
 <!--<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>-->
  <servlet>
	<servlet-name>springmvc</servlet-name>
	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<!--加载springmvc容器-->

	<init-param>
	<param-name>contextConfigLocation</param-name>
	<param-value>classpath:spring/springmvc.xml</param-value>
	</init-param>
  </servlet>
  <servlet-mapping>
	<servlet-name>springmvc</servlet-name>
	<url-pattern>*.action</url-pattern>
  </servlet-mapping>

  
  <!-- 消除spring jar包中的bug -->
 <context-param>  
    <param-name>spring.profiles.active</param-name>  
    <param-value>dev</param-value>  
</context-param>  
<context-param>  
    <param-name>spring.profiles.default</param-name>  
    <param-value>dev</param-value>  
</context-param>
<context-param>  
    <param-name>spring.liveBeansView.mbeanDomain</param-name>  
    <param-value>dev</param-value>  
</context-param>
  </web-app>

spring 配置文件：applicationConext-service.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.2.xsd 
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
http://www.springframework.org/schema/tx 
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd " 
xmlns:tx="http://www.springframework.org/schema/tx" 
xmlns:aop="http://www.springframework.org/schema/aop" 
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns="http://www.springframework.org/schema/beans">
<!--扫描service层-->
	<context:component-scan base-package="com.drs.service.impl"></context:component-scan>
</beans>

springmvc配置文件：springmvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.2.xsd 
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
http://www.springframework.org/schema/tx 
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd " 
xmlns:tx="http://www.springframework.org/schema/tx" 
xmlns:aop="http://www.springframework.org/schema/aop" 
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns="http://www.springframework.org/schema/beans">

<!--web层包扫描-->
	<context:component-scan base-package="com.drs.controller"/>
	<mvc:annotation-driven conversion-service="conversionService" />
	<!--<bean id="validator" 
	class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
	<property name="providerClass" value="org.hibernate.validator.HibernateValidator"/>
	<property name="validationMessageSource" ref="messageSource"/>
	</bean>
	<bean id="messageSource" 
	class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
	<property name="basenames">
	<list>
	<value>classpath:CustomValidationMessages</value>
	</list>
	</property>
	<property name="fileEncodings" value="utf-8"/>
	<property name="cacheSeconds" value="120"/>
	</bean>
	-->
	<mvc:resources location="/js/" mapping="/js/**"/>
	<mvc:resources location="/img/" mapping="/img/**"/>
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/"/>
		<property name="suffix" value=".jsp"/>
	</bean>
		<!-- 文件上传 -->
	<bean id="multipartResolver"
		class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<!-- 设置上传文件的最大尺寸为5MB -->
		<property name="maxUploadSize">
			<value>5242880</value>
		</property>
	</bean>
	<mvc:interceptors>
	<!--多个拦截器,顺序执行 -->
	<!-- 登陆认证拦截器 -->
	<mvc:interceptor>
		<mvc:mapping path="/**"/>
		<bean class="com.drs.controller.interceptor.HandlerInterceptorLogin"></bean>
	</mvc:interceptor>
	</mvc:interceptors>
	<bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
		<property name="converters">
			<list>
				<bean class="com.drs.controller.converter.CustomDateConverter"/>
			</list>
		</property>
	</bean>
	<!--<bean class="cn.itcast.ssm.controller.exception.CustomExceptionResolver"></bean>
	<bean id="multipartResolver"
	class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
	<property name="maxUploadSize">
	<value>5242880</value>
	</property>
	</bean>
	<mvc:resources location="/js/" mapping="/js/**"/>
	<mvc:resources location="/img/" mapping="/img/**"/>
	-->
	<!--不推荐使用
	<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping">
		<property name="interceptors">
			<list>
			<ref bean="handlerInterceptor1"/>
			<ref bean="handlerInterceptor2"/>
			</list>
		</property>
	</bean>
	<bean id="handlerInterceptor1" class="cn.itcast.ssm.controller.interceptor.HandlerInterceptor1"/>
	<bean id="handlerInterceptor2" class="cn.itcast.ssm.controller.interceptor.HandlerInterceptor2"/>
	-->
	<!--<mvc:interceptors>
		<mvc:interceptor>
			<mvc:mapping path="//**"/>
			<bean class="cn.itcast.ssm.interceptor.LoginInterceptor"></bean>
		</mvc:interceptor>
		<mvc:interceptor>
			<mvc:mapping path="/**"/>
			<bean class="cn.itcast.ssm.interceptor.HandlerInterceptor1"></bean>
		</mvc:interceptor>
		<mvc:interceptor>
			<mvc:mapping path="/**"/>
			<bean class="cn.itcast.ssm.interceptor.HandlerInterceptor2"></bean>
		</mvc:interceptor>
	</mvc:interceptors>-->
</beans>

我把service层放到了spring容器中，把web层放到了springmvc容器中，两个容器是父子容器关系，就像java类中继承类似，子类可以访问父类的方法，但父类不能访问子类的方法，同样道理，springmvc容器可以访问spring容器的bean，但spring不可以访问springmvc容器的bean。这里我们在 web层也就是controller自动注入（@Autowired）service层的bean,这个过程肯定需要spring容器访问springmvc容器，但是肯定访问不了，所以web层会抛出异常，service层的bean未创建，所以这些包扫描应该配置到springmvc配置文件上，那么我们使用spring干嘛，一方面spring扩展性比较好，另一方面，管理事务，包括一些aop编程。所以以后需要把service层包扫描配置到springmvc配置文件中。

解决在spring配置文件中包扫描无效问题

猜你喜欢