注入Dao至serviceImp的问题

[江西DJ烟仔ReMix]

论坛上的各位大神们好，最近本人因dao注入到serviceImp类出现了问题，绞尽脑汁 花了大量的时间也没解决，只知到问题原因是serviceipm那里注入dao出现了错误，希望看到此贴的朋友能指点一下，本人感激不尽 代码如下：




就是这里serviceImp类userBasicInfoDao.insertUser(userBasicInfo)出现了问题，导致创建ben失败，但就是不知错在哪

















启动报错的完整代码如下：

严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userBasicInfoAction': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private music.struts2.service.UserBasicInfoService music.struts2.action.UserBasicInfoAction.userBasicInfoService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userBasicInfoServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private music.struts2.dao.UserBasicInfoDao music.struts2.service.impl.UserBasicInfoServiceImpl.userBasicInfoDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [music.struts2.dao.UserBasicInfoDao] 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:289)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1146)
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:296)

[方丈的寺院]

UserBasicInfoDao 的实现类要加上Annotation . @Component or @Repository

[I,Frankenstein]

你是不是没有给UserBasicInfoDao实现类加上注解? 另外，给楼主个建议， 1：@Service("userService")；@Controller("xxAction")；注解的时候加个名字稍微会好点，给后来人个看懂的机会，本来注解就挺晦涩难找的了。 2：@Autowried(required=false) 会好一点！它默认是true

[小白晒太阳]

@Component(value = "userBasicInfoDao") 你那个UserBasicInfoDao上面加上这个注解 然后Service里面用@Resource

[小白晒太阳]

引用 3 楼 Tro_picana 的回复:

@Component(value = "userBasicInfoDao") 你那个UserBasicInfoDao上面加上这个注解 然后Service里面用@Resource

你的UserBasicInfoDao有对应的实现类吗？注解换到实现类上试试。

[codingjav]

上面说的很详细撒

[JC_WorkSpace]

应该是MyBatis没有扫描并注入这个DAO，看你的配置文件并没有指明需要扫描的包路径，你可以按照12楼那位大哥的方式试试看。

[尼古拉斯-全蛋]

坐等接分

[a4boy]

或者 action中 @resource 改为@autowired

[今天晴]

在UserBasicInfoDao的实现类上注解

[江西DJ烟仔ReMix]

怎么回复啊!!!!

[江西DJ烟仔ReMix]

引用 楼主 u014598014 的回复:

论坛上的各位大神们好，最近本人因dao注入到serviceImp类出现了问题，绞尽脑汁 花了大量的时间也没解决，只知到问题原因是serviceipm那里注入dao出现了错误，希望看到此贴的朋友能指点一下，本人感激不尽 代码如下： 就是这里serviceImp类userBasicInfoDao.insertUser(userBasicInfo)出现了问题，导致创建ben失败，但就是不知错在哪 启动报错的完整代码如下： 严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userBasicInfoAction': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private music.struts2.service.UserBasicInfoService music.struts2.action.UserBasicInfoAction.userBasicInfoService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userBasicInfoServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private music.struts2.dao.UserBasicInfoDao music.struts2.service.impl.UserBasicInfoServiceImpl.userBasicInfoDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [music.struts2.dao.UserBasicInfoDao] 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:289) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1146) 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:296)

我加过@Repository这个注解但也是没用

[江西DJ烟仔ReMix]

[quote=引用 楼主 u014598014 的回复:] UserBasicInfoDao 这个是mybatis的映射文件接口,不是mybatis内部自动实现的吗

[码上大侠]

配置文件缺少MapperScannerConfigurer <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="music.struts2.dao" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean>

[snn2011]

把@autowired改成@Resource 这个错误说的是没有找到合适的bean类型。。

[江西DJ烟仔ReMix]

引用 12 楼 Tomorrow_Morning 的回复:

配置文件缺少MapperScannerConfigurer <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="music.struts2.dao" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean>

大神你太厉害了，就是你说的那样，缺少那个MapperScannerConfigurer配置，怎么把分给你啊，这论坛做的不人性化，不好操作

[朝 花 拾 夕]

哎 ，没意思，这种问题，百度了 就有解决办法的啊

[码上大侠]

引用 15 楼 u014598014 的回复:

[quote=引用 12 楼 Tomorrow_Morning 的回复:] 配置文件缺少MapperScannerConfigurer <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="music.struts2.dao" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean>

大神你太厉害了，就是你说的那样，缺少那个MapperScannerConfigurer配置，怎么把分给你啊，这论坛做的不人性化，不好操作[/quote] 结贴散分

[hlfan2]

少一个配置，整个都要崩

[vita bella]

请问，如果我不实现Mapper的实现类，直接把它封装在Service的实现类里，怎么解决报错的问题。我在Service的实现类上写了@Controller("impl")。。。然后它走到有@Autowired注解的封装Dao层类上就报错了。这个怎么解决，如果不实现Dao层的实现类的话。。。。我看人家的项目里就是没有用到Dao层的实现类。直接封装到Service实现类的。是要配置什么吗