Question

我认为这不是一个比较聪明的人，而是陷入了这种困境。无法理解为什么会发生这种情况。这就是我的servlet-context.xml的样子

<beans:bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
    <beans:property name="entityManagerFactory" ref="entityManagerFactory"/>
</beans:bean>

<beans:bean class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" id="entityManagerFactory">
    <beans:property name="persistenceUnitName" value="xxxx"/>
     <beans:property name="persistenceXmlLocation" value="classpath:META-INF/persistence.xml"/>
    <beans:property name="dataSource" ref="dataSource"/>
</beans:bean>

和相应的web.xml文件来解决延迟初始化问题

<filter>
    <filter-name>SpringOpenEntityManagerInViewFilter</filter-name>
    <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
     <init-param>
        <param-name>entityManagerFactoryBeanName</param-name>
        <param-value>entityManagerFactory</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>SpringOpenEntityManagerInViewFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

但是一旦我尝试使用以下异常跟踪

来访问我的应用程序，我就会遇到异常

org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' is defined
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:638)
at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1159)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:282)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:979)
at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.lookupEntityManagerFactory(OpenEntityManagerInViewFilter.java:187)
at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.lookupEntityManagerFactory(OpenEntityManagerInViewFilter.java:170)
at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:128)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)

知道我在这里缺少什么。

Answer 1

您的所有配置都很好。除了您在spring bean配置xml文件中缺少org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor之外的事实。试着把它包括在内，看看它是否有效。但是我还没有使用它。

如果您遇到延迟加载的问题并希望解决这个问题，我建议您在使用延迟收集/延迟加载对象（通常在服务层）中的方法中划分@Transaction，而不是放置它关于DAO类的方法。这样你就可以让交易有点延长。

Spring配置org.springframework.beans.factory.NoSuchBeanDefinitionException：没有bean命名为＆＃39; entityManagerFactory＆＃39;被定义为

1 个答案: