问题描述

关于springmvc+mybatis 注入问题

service:

 package com.yhq.service.biz;import com.yhq.service.po.User;public interface UserBiz {    void insert(User u);}

impl:

 package com.yhq.service.impl;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import com.yhq.service.api.UserMapper;import com.yhq.service.biz.UserBiz;import com.yhq.service.po.User;@Servicepublic class UserBizImpl implements UserBiz {    @Autowired    private UserMapper userMapper;    public void insert(User u) {        // TODO Auto-generated method stub        userMapper.insert(u);    }}

database.xml

<?xml version=""1.0"" encoding=""UTF-8""?><beans xmlns=""http://www.springframework.org/schema/beans""       xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance""       xmlns:aop=""http://www.springframework.org/schema/aop""       xmlns:tx=""http://www.springframework.org/schema/tx""       xsi:schemaLocation=""http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.0.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-3.0.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-3.0.xsd"">    <aop:aspectj-autoproxy/>    <!-- 数据源配置使用应用内的DBCP数据库连接池  -->    <bean id=""dataSource"" class=""org.apache.commons.dbcp.BasicDataSource"" destroy-method=""close"">        <property name=""driverClassName""><value>${jdbc.driverClassName}</value></property>        <property name=""url""><value>${jdbc.url}</value></property>        <property name=""username""><value>${jdbc.username}</value></property>        <property name=""password""><value>${jdbc.password}</value></property>        <property name=""maxActive""><value>${jdbc.maxActive}</value></property>        <property name=""maxWait""><value>${jdbc.maxWait}</value></property>        <property name=""maxIdle""><value>${jdbc.maxIdle}</value></property>        <property name=""initialSize""><value>${jdbc.initSize}</value></property>        <property name=""removeAbandoned""><value>true</value></property>        <property name=""testWhileIdle""><value>true</value></property>        <property name=""testOnBorrow""><value>false</value></property>        <property name=""validationQuery""><value>SELECT 1</value></property>    </bean>    <!-- Transaction manager for a single JDBC DataSource -->    <bean id=""transactionManager"" class=""org.springframework.jdbc.datasource.DataSourceTransactionManager"">        <property name=""dataSource"" ref=""dataSource"" />    </bean>    <bean id=""sqlSessionFactory"" class=""org.mybatis.spring.SqlSessionFactoryBean"">        <property name=""dataSource"" ref=""dataSource"" />        <property name=""configLocation"" value=""classpath:sqlmap-config.xml"" />        <property name=""mapperLocations"">            <value>classpath*:com/yhq/service/map/*Mapper.xml</value>        </property>    </bean>    <bean id=""sqlSession""  class=""org.mybatis.spring.SqlSessionTemplate"" scope=""prototype"">        <constructor-arg index=""0"" ref=""sqlSessionFactory"" />    </bean>    <!-- 连接事务的注解配置 -->    <tx:annotation-driven transaction-manager=""transactionManager"" />    <bean id=""txInterceptor"" class=""org.springframework.transaction.interceptor.TransactionInterceptor"">        <property name=""transactionManager"">            <ref bean=""transactionManager""/>        </property>        <property name=""transactionAttributes"">            <props>                <prop key=""insert*"">PROPAGATION_REQUIRED-Exception</prop>                <prop key=""save*"">PROPAGATION_REQUIRED-Exception</prop>                <prop key=""delete*"">PROPAGATION_REQUIRED-Exception</prop>                <prop key=""update*"">PROPAGATION_REQUIRED-Exception</prop>                <prop key=""create*"">PROPAGATION_REQUIRED-Exception</prop>                <prop key=""*"">PROPAGATION_REQUIREDreadOnly</prop>            </props>        </property>    </bean>    <bean class=""org.mybatis.spring.mapper.MapperScannerConfigurer"">        <property name=""sqlSessionTemplateBeanName"" value=""sqlSession""/>        <property name=""basePackage"">            <value>                 com.yhq.service.api            </value>        </property>    </bean>    <bean id=""aspectJExpressionPointcutAdvisor"" class=""org.springframework.aop.aspectj.AspectJExpressionPointcutAdvisor"">        <property name=""advice"">            <ref bean=""txInterceptor"" />        </property>        <property name=""expression"">            <value><![CDATA[execution(* com.yhq..*.*BizImpl.*(..)) && @within(org.springframework.stereotype.Service) &&            (execution(* create*(..)) || execution(* delete*(..)) || execution(* update*(..)) || execution(* save*(..)))]]></value>        </property>    </bean></beans>

spring.xml

 <?xml version=""1.0"" encoding=""UTF-8""?><beans xmlns=""http://www.springframework.org/schema/beans""       xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance""       xmlns:context=""http://www.springframework.org/schema/context""       xmlns:mvc=""http://www.springframework.org/schema/mvc""       xsi:schemaLocation=""http://www.springframework.org/schema/beans       http://www.springframework.org/schema/beans/spring-beans.xsd       http://www.springframework.org/schema/context       http://www.springframework.org/schema/context/spring-context.xsd       http://www.springframework.org/schema/mvc       http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"">       <mvc:annotation-driven/>       <context:component-scan base-package=""com.yhq"">       </context:component-scan>       <bean id=""viewResolver"" class=""org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver"">              <property name=""order"" value=""0"" />              <property name=""cache"" value=""true"" />              <property name=""prefix"" value=""""/>              <property name=""suffix"" value="".html""/>              <property name=""viewClass"" value=""org.springframework.web.servlet.view.freemarker.FreeMarkerView"" />              <property name=""exposeSpringMacroHelpers"" value=""true"" />              <property name=""exposeRequestAttributes"" value=""true"" />              <property name=""exposeSessionAttributes"" value=""true"" />              <property name=""requestContextAttribute"" value=""rc"" />              <property name=""contentType"" value=""text/html;charset=UTF-8"" />       </bean>       <bean id=""freemarkerConfig"" class=""org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer"">              <property name=""templateLoaderPath"" value=""/WEB-INF/pages/"" />              <property name=""defaultEncoding"" value=""UTF-8"" />              <property name=""freemarkerSettings"">                     <props>                            <prop key=""template_update_delay"">0</prop>                            <prop key=""locale"">zh_CN</prop>                            <prop key=""default_encoding"">UTF-8</prop>                            <prop key=""number_format"">0.##########</prop>                            <prop key=""datetime_format"">yyyy-MM-dd HH:mm:ss</prop>                            <prop key=""classic_compatible"">true</prop>                            <prop key=""template_exception_handler"">ignore</prop>                     </props>              </property>       </bean></beans> 

解决方案

错误信息：

 严重: StandardWrapper.Throwableorg.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userBizImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.yhq.service.api.UserMapper com.yhq.service.impl.UserBizImpl.userMapper; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.yhq.service.api.UserMapper] 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)    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:293)    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.load(StandardWrapper.java:1087)    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5231)    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5518)    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575)    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565)    at java.util.concurrent.FutureTask.run(FutureTask.java:266)    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)    at java.lang.Thread.run(Thread.java:745)Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.yhq.service.api.UserMapper com.yhq.service.impl.UserBizImpl.userMapper; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.yhq.service.api.UserMapper] 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$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:517)    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:286)    ... 29 moreCaused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.yhq.service.api.UserMapper] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:988)    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:858)    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:770)    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:489)    ... 31 more三月 23 2016 5:15:39 下午 org.apache.catalina.core.StandardContext loadOnStartup严重: Servlet /demo threw load() exceptionorg.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.yhq.service.api.UserMapper] 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:988)    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:858)    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:770)    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:489)    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:286)    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)    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:293)    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.load(StandardWrapper.java:1087)    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5231)    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5518)    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575)    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565)    at java.util.concurrent.FutureTask.run(FutureTask.java:266)    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)    at java.lang.Thread.run(Thread.java:745)

解决方案二：
异常信息显示UserMapper 这个类型的属性注入失败，检查写这个UserMapper 类的定义，是否所有属性都提供了getter和setter，以及无参数构造函数。