我正在研究struts2演示项目并且正在管理Hibernate会话。
我正在关注这篇文章http://www.splinter.com.au/using-spring-to-manage-hibernate-sessions-in/
错误
SEVERE: 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 'dataSource' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Initialization of bean failed; nested exception is java.lang.NoSuchFieldError: NULL
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:609)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4791)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NoSuchFieldError: NULL
at org.springframework.expression.TypedValue.<clinit>(TypedValue.java:32)
at org.springframework.expression.spel.support.StandardEvaluationContext.setRootObject(StandardEvaluationContext.java:85)
at org.springframework.expression.spel.support.StandardEvaluationContext.<init>(StandardEvaluationContext.java:74)
at org.springframework.context.expression.StandardBeanExpressionResolver.evaluate(StandardBeanExpressionResolver.java:124)
at org.springframework.beans.factory.support.AbstractBeanFactory.evaluateBeanDefinitionString(AbstractBeanFactory.java:1299)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.evaluate(BeanDefinitionValueResolver.java:210)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:182)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1360)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1118)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
... 21 more
Sep 24, 2012 7:22:18 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error listenerStart
Sep 24, 2012 7:22:18 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Context [/1-Struts2_CRUD] startup failed due to previous errors
Sep 24, 2012 7:22:18 AM org.apache.catalina.core.ApplicationContext log
INFO: Closing Spring root WebApplicationContext
Sep 24, 2012 7:22:18 AM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: The web application [/1-Struts2_CRUD] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
Sep 24, 2012 7:22:18 AM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [/1-Struts2_CRUD] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak.
的applicationContext.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"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<!-- enable annotation beans definitions -->
<context:component-scan base-package="com.pirzada"/>
<!-- Basic DataSource Configuration -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/struts2_demo_db"/>
<property name="username" value="root"/>
<property name="password" value="786"/>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="packagesToScan">
<list>
<value>com.pirzada.dao</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.connection.useUnicode">true</prop>
<prop key="hibernate.connection.characterEncoding">UTF-8</prop>
<prop key="hibernate.max_fetch_depth">0</prop>
<prop key="hibernate.jdbc.use_scrollable_resultset">true</prop>
</props>
</property>
</bean>
<!-- defining transaction manager bean using Hibernate -->
<bean id="txManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<!-- enable the configuration of transactional behavior based on annotations -->
<tx:annotation-driven transaction-manager="txManager"/>
<!-- <!– exception translation bean post processor –>
<bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>
<bean class="org.springframework.orm.hibernate4.HibernateExceptionTranslator"/>-->
<!-- DAO beans -->
<!--
<bean id="userDAO" class="org.droidaceapps.dao.UserDAOImpl">
<property name="hibernateTemplate" ref="hibernateTemplate" />
</bean>
<!– Service beans –>
<bean id="userService" class="org.droidaceapps.services.UserServiceImpl">
<property name="userDAO" ref="userDAO" />
</bean>-->
</beans>
的web.xml
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>Archetype Created Web Application</display-name>
<!--<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>-->
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- Spring -->
<listener> <!-- Required for the struts2 spring plugin to work -->
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<filter> <!-- Get spring to keep the session open for the whole request, so hibernate's lazy loads work -->
<filter-name>openSessionInViewFilter</filter-name>
<filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class>
<init-param>
<param-name>sessionFactoryBeanName</param-name>
<param-value>sessionFactory</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>openSessionInViewFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>/index.jsp</welcome-file>
</welcome-file-list>
</web-app>
hibernate.cfg.xml中
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/struts2_demo_db</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">786</property>
<property name="hibernate.connection.pool_size">1</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>
<!-- Echo all executed SQL to stdout for debugging -->
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">update</property>
<property name="hibernate.connection.provider_class">org.hibernate.service.jdbc.connections.internal.C3P0ConnectionProvider</property>
<property name="hibernate.c3p0.max_size">100</property>
<property name="hibernate.c3p0.min_size">1</property>
<property name="hibernate.c3p0.idle_test_period">30</property>
<mapping class="com.pirzada.domain.User"/>
<!-- DB schema will be updated if needed -->
<!-- <property name="hbm2ddl.auto">update</property> -->
</session-factory>
</hibernate-configuration>
在UserDAOImpl
/*@Transactional is needed so that a Hibernate transaction is set up, otherwise updates won't have an affect*/
@Transactional
public class UserDAOImpl implements UserDAO {
// So Spring can inject the session factory
protected SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory value) {
sessionFactory = value;
}
// Shortcut for sessionFactory.getCurrentSession()
protected Session session() {
return sessionFactory.getCurrentSession();
}
@Override
public void saveOrUpdateUser(User user) {
session().saveOrUpdate(user);
}
}
行家
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
</dependency>
<!-- javaee-api 6 dependencies -->
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>6.0</version>
<scope>provided</scope>
</dependency>
<!-- Spring framework dependencies -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>3.1.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-spring-plugin</artifactId>
<version>2.3.4.1</version>
</dependency>
<!-- struts2 dependencies -->
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-core</artifactId>
<version>2.3.4.1</version>
</dependency>
<!-- sl4j dependencies -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<!-- Hibernate dependencies -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>${hibernate.core.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.3.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-c3p0</artifactId>
<version>${hibernate.core.version}</version>
</dependency>
<!-- JDBC dependencies -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.21</version>
</dependency>
</dependencies>
答案 0 :(得分:3)
在类路径中看起来是一个不兼容的JAR文件版本的问题,例如Spring可能需要一些更低版本或更高版本的hibernate。 hibernate.core.version
- 这会很有用。尝试使用Hibernate3,我敢打赌它是Hibernate4及其Spring支持的问题。
答案 1 :(得分:1)
我无法提供解决方案,但由于我无法发表评论,因为我没有足够的积分,我可以向您提供我所获得的信息,希望您也能找到解决方案。
当我尝试运行示例项目时,我遇到了同样的错误。我正在运行Hibernate 3.2.0.ga,Maven 2,Spring 3.2.0和Tomcat 7.我得到了确切的错误。我下载了源文件,放入休息并在调试时运行Tomcat。从我所知道的。我在尝试获取已注册的范围时收到错误。 Beans传入的是“singleton”,当它查找该范围时,它返回null并且我得到你描述的错误。
为了理智,我为所有的bean添加了“session”,我得到了一个不同的错误
java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? If you are actually operating within a web request and still receive this message, your code is probably running outside of DispatcherServlet/DispatcherPortlet: In this case, use RequestContextListener or RequestContextFilter to expose the current request.
at org.springframework.web.context.request.RequestContextHolder.currentRequestAttributes(RequestContextHolder.java:131)
...
我希望这可能会让你走上正确的道路来解决这个问题,因为我也希望找到解决方案。设置项目和项目基础设施是我的弱点,所以这对我来说总是一个头脑。
编辑: 果然,它很可能是库版本冲突。在我的项目中,当我收到错误时,我最初尝试使用最新的Spring和Hibernate 3。我用Google搜索并搜索了哪些版本相互兼容,并在Hibernate论坛上发现了一条旧评论,显示Spring 3.0.0.RELEASE将与Hibernate 3.4.0.GA一起使用。我计划更新每个更新,直到我可以获得这两个工具的最新兼容版本。
SO评论的人曾说过
只需使用这些库,直到找到它们为止 兼容。这不是开发人员的有趣部分之一吗?
......我当然希望这个家伙很滑稽。
答案 2 :(得分:1)
您应该将mysql-connector-java-5.1.26-bin.jar添加到WEB-INF / lib中。我遇到了像你这样的问题。它会工作。