not found for dependency: expected at least 1 bean which qualifies as autowire

错误信息：

 

2014-01-09 21:17:54  Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.hailong.midea.busi.user.manager.UserManager com.hailong.midea.web.user.UserController.userManager; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.hailong.midea.busi.user.manager.UserManager] 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:285)
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1074)
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
 at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
 at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
 at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
 at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
 at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580)
 at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
 at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
 at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:442)
 at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:458)
 at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:339)
 at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:306)
 at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:127)
 at javax.servlet.GenericServlet.init(GenericServlet.java:242)
 at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:492)
 at org.eclipse.jetty.servlet.ServletHolder.doStart(ServletHolder.java:312)
 at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
 at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:776)
 at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:258)
 at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1213)
 at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:699)
 at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:454)
 at org.mortbay.jetty.plugin.JettyWebAppContext.doStart(JettyWebAppContext.java:256)
 at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
 at org.eclipse.jetty.server.handler.HandlerCollection.doStart(HandlerCollection.java:224)
 at org.eclipse.jetty.server.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:167)
 at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
 at org.eclipse.jetty.server.handler.HandlerCollection.doStart(HandlerCollection.java:224)
 at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
 at org.eclipse.jetty.server.handler.HandlerWrapper.doStart(HandlerWrapper.java:90)
 at org.eclipse.jetty.server.Server.doStart(Server.java:263)
 at org.mortbay.jetty.plugin.JettyServer.doStart(JettyServer.java:65)
 at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
 at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:511)
 at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo.java:364)
 at org.mortbay.jetty.plugin.JettyRunMojo.execute(JettyRunMojo.java:514)
 at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:483)
 at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:678)
 at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:540)
 at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:519)
 at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:371)
 at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:332)
 at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:181)
 at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:356)
 at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:137)
 at org.apache.maven.cli.MavenCli.main(MavenCli.java:356)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
 at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
 at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
 at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.hailong.midea.busi.user.manager.UserManager com.hailong.midea.web.user.UserController.userManager; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.hailong.midea.busi.user.manager.UserManager] 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)
 ... 56 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.hailong.midea.busi.user.manager.UserManager] 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)
 ... 58 more
 
 
 解决方案：
 从错误上看是因为UserController 中的userManager注入失败导致Spring容器初始化失败。
 为什么注入失败，肯定是spring的配置文件中的配置项导致。
 
 打开spring的xml配置文件看到context:component-scan 自动扫描组件的配置 ，只配置了扫描com.hailong.midea.web.user包下的controller，
 而没有配置扫描busi层，导致注入失败，如果busi层和controller层的包名前一部分相同，则配置两者相同部分即可。配置如下：
 
 配置方法一：
 <context:component-scan base-package="com.xxxx.midea"/>
 
 或者是配置两组不同的部分也是可行的。
 
 配置方法二：
 <!-- spring组件扫描器;如扫描(Controller、Service等等) -->
 <context:component-scan base-package="com.xxxx.midea.busi.user.manager" />
 <context:component-scan base-package="com.xxxx.midea.web.user" />