Question

冬眠-cfg.xml中：

<context:property-placeholder location="classpath*:config/db/database.properties"/>

<!-- DataSource -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="${jdbc.driverClassName}" />
    <property name="url" value="${jdbc.url}" />
    <property name="username" value="${jdbc.username}" />
    <property name="password" value="${jdbc.password}" />
</bean>    

<!-- Hibernate session factory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
            <prop key="hibernate.show_sql">true</prop>
        </props>
    </property>
    <property name="mappingResources">
        <list>
            <value>classpath:config/db/mapping/userdetails.hbm.xml</value>
        </list>
    </property>
</bean>

启动tomcat时出错：

>WARNING: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in URL [file:/D:/workspace/project/test/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/testWeb/WEB-INF/classes/config/db/hibernate-cfg.xml]: Invocation of init method failed; nested exception is java.lang.NullPointerException

2016年5月8日上午10:02:02 org.springframework.web.context.ContextLoader initWebApplicationContext 严重：上下文初始化失败 org.springframework.beans.factory.BeanCreationException：创建名称为＆＃39; sessionFactory＆＃39;的bean时出错在URL中定义[file：/ D：/workspace/project/test/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/testWeb/WEB-INF/classes/config/db/hibernate- cfg.xml]：调用init方法失败;嵌套异常是java.lang.NullPointerException 在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1578）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:545）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:482） at org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:306）在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:230）在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:302）在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:197） at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons（DefaultListableBeanFactory.java:753） at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:839）在org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:538）在org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext（ContextLoader.java:444）在org.springframework.web.context.ContextLoader.initWebApplicationContext（ContextLoader.java:326）在org.springframework.web.context.ContextLoaderListener.contextInitialized（ContextLoaderListener.java:107）在org.apache.catalina.core.StandardContext.listenerStart（StandardContext.java:4812） at org.apache.catalina.core.StandardContext.startInternal（StandardContext.java:5255）在org.apache.catalina.util.LifecycleBase.start（LifecycleBase.java:147）在org.apache.catalina.core.ContainerBase $ StartChild.call（ContainerBase.java:1408）在org.apache.catalina.core.ContainerBase $ StartChild.call（ContainerBase.java:1398） at java.util.concurrent.FutureTask $ Sync.innerRun（Unknown Source） at java.util.concurrent.FutureTask.run（Unknown Source） at java.util.concurrent.ThreadPoolExecutor.runWorker（Unknown Source） at java.util.concurrent.ThreadPoolExecutor $ Worker.run（Unknown Source）在java.lang.Thread.run（未知来源）引起：java.lang.NullPointerException at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl $ AggregatedClassLoader.getResources（ClassLoaderServiceImpl.java:173） at java.util.ServiceLoader $ LazyIterator.hasNext（Unknown Source） at java.util.ServiceLoader $ 1.hasNext（Unknown Source） at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.loadJavaServices（ClassLoaderServiceImpl.java:340）在org.hibernate.integrator.internal.IntegratorServiceImpl。（IntegratorServiceImpl.java:40）在org.hibernate.boot.registry.BootstrapServiceRegistryBuilder.build（BootstrapServiceRegistryBuilder.java:213）在org.hibernate.cfg.Configuration。（Configuration.java:119）在org.springframework.orm.hibernate4.LocalSessionFactoryBuilder。（LocalSessionFactoryBuilder.java:140）在org.springframework.orm.hibernate4.LocalSessionFactoryBean.afterPropertiesSet（LocalSessionFactoryBean.java:343）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods（AbstractAutowireCapableBeanFactory.java:1637）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1574） ......还有22个

请帮助解决问题。

提前致谢。

Answer 1

只需在AbstractAutowireCapableBeanFactory.java设置断点，行号1578（确保已下载Spring源，在IDEA中，您可以通过按Maven工具窗口中的“下载源”按钮下载源代码），您会发现究竟发生了什么。

或者指定你的Spring版本（spring-beans，AbstractAutowireCapableBeanFactory类所在的位置）。

Answer 2

将所有jar移动到WEB-INF / lib后，它可以正常工作。

感谢。

初始化org.springframework.orm.hibernate4.LocalSessionFactoryBean

2 个答案: