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spring的@Autowired无法注入service的bean(springmvc+mybatis)

工程目录:

这个是controller:
@Controller
public class ItemsController {

	@Autowired
	private ItemsService itemsService;//这里无法自动注入

	@RequestMapping("/queryItems")
	public ModelAndView qurryItems() throws Exception {

		List<ItemsCustom> itemsList = itemsService.findItemsList(null);

		ModelAndView modelAndView = new ModelAndView();
		modelAndView.addObject("itemsList", itemsList);

		modelAndView.setViewName("items/itemsList");

		return modelAndView;
	}
}

这个是service:

public interface ItemsService {
	public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) throws Exception;
}

这个是service的实现类:

public class ItemsServiceImpl implements ItemsService {
	@Autowired
	private ItemsMapperCustom itemsMapperCustom;
	public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo)
			throws Exception {
		return itemsMapperCustom.findItemsList(itemsQueryVo);
	}
}

springmvc的配置:

<context:component-scan base-package="com.fww.ssm.controller"/>
            
<mvc:annotation-driven/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/jsp/"/>
		<property name="suffix" value=".jsp"/>
</bean>

applicationContext-service的配置:

<bean id="itemsService" class="com.fww.ssm.service.impl.ItemsServiceImpl"/>

web.xml的配置:

  	<!-- 加载spring容器 -->
  	<context-param>
  		<param-name>contextConfigLocation</param-name>
  		<param-value>WEB-INF\classes\spring\applicationContext-*.xml</param-value>
  	</context-param>
  	<listener>
  		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  	</listener>
  
  	<!-- springmvc前端控制器 -->
    <servlet>
  		<servlet-name>springmvc</servlet-name>
  		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  		<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>

下面是报错:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name "itemsController": Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.fww.ssm.service.ItemsService com.fww.ssm.controller.ItemsController.itemsService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.fww.ssm.service.ItemsService] 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.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:288)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1116)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:628)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
	at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:651)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:599)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:665)
	at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:518)
	at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:459)
	at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
	at javax.servlet.GenericServlet.init(GenericServlet.java:158)
	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1284)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1197)
	at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:864)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:134)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:957)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2516)
	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2505)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:619)

百度各种。有说要加注解@service和注解@Repository的。都没效果。

解决方案

10

<context:component-scan base-package=”com.fww.ssm.controller”/>
这个改为
<context:component-scan base-package=”com.fww.ssm”/>这个试试
或将Controller 也用bean的形式试试看

10

要注入的接口只能有一个实现类。你可以试试@Resource(beanId)

5

<context:component-scan base-package=”com.fww.ssm.controller”
use-default-filters=”false”>
<context:include-filter type=”annotation”
expression=”org.springframework.stereotype.Controller” />
</context:component-scan>
注解扫描

5

实现类没有声明service,长得这样,有印象不。【@Service】

10

引用:

实现类没有声明service,长得这样,有印象不。【@Service】

这位朋友说的有道理。你应该在service层实现类里面加上@service,将服务层注入,才能引用:

Quote: 引用:

实现类没有声明service,长得这样,有印象不。【@Service】

这位朋友说的有道理。你应该在service层实现类里面加上@service,将服务层注入,才能引用
@Service
public class ItemsServiceImpl implements ItemsService {
@Autowired
private ItemsMapperCustom itemsMapperCustom;
public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo)
throws Exception {
return itemsMapperCustom.findItemsList(itemsQueryVo);
}
}

楼上的亲这个是spring管理事务用的,现在他没有事务的概念,连数据库都没有,不需要这个

5

@Service
public class ItemsServiceImpl implements ItemsService {
加上]@Service试下

5

applicationContext配置文件中有没有加<context:component-scan base-package=”com.fww.ssm”/>

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