Spring报错：No bean named 'sessionFactory' is defined怎么解决？

2016-5-2 23:46:30 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet jsp threw exception
org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'sessionFactory' is defined
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:527)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1083)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:274)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1079)
    at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.lookupSessionFactory(OpenSessionInViewFilter.java:242)
    at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.lookupSessionFactory(OpenSessionInViewFilter.java:227)
    at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:171)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:389)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Thread.java:662)

上面是报错信息
web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 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_2_5.xsd">

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            classpath*:com/forum/config/applicationContext-*.xml
        </param-value>
    </context-param>
    <listener>
        <listener-class>
            org.springframework.web.context.ContextLoaderListener
        </listener-class>
    </listener>
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>
            org.apache.struts2.dispatcher.FilterDispatcher
        </filter-class>
    </filter>
    <filter>
        <filter-name>sessionview</filter-name>
        <filter-class>
            org.springframework.orm.hibernate3.support.OpenSessionInViewFilter
        </filter-class>
    </filter>
    <filter>
        <filter-name>forumlist</filter-name>
        <filter-class>
            com.forum.filter.ForumListFilter
        </filter-class>
    </filter>
    <filter-mapping>
        <filter-name>forumlist</filter-name>
        <url-pattern>/forumlist.jsp</url-pattern>
    </filter-mapping>
    <servlet>
        <servlet-name>CheckUser</servlet-name>
        <servlet-class>com.forum.servlet.CheckUser</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>CheckUser</servlet-name>
        <url-pattern>/servlet/CheckUser</url-pattern>
    </servlet-mapping>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <filter-mapping>
        <filter-name>sessionview</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

applicationContext.xml

<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/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

    <bean id="userDAO" class="com.forum.dao.impl.BaseDAOimpl">
        <constructor-arg>
            <value>com.forum.model.bean.User</value>
        </constructor-arg>
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
    <bean id="forumDAO" class="com.forum.dao.impl.BaseDAOimpl">
        <constructor-arg>
            <value>com.forum.model.bean.Forums</value>
        </constructor-arg>
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
    <bean id="configDAO" class="com.forum.dao.impl.BaseDAOimpl">
        <constructor-arg>
            <value>com.forum.model.bean.Config</value>
        </constructor-arg>
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
    <bean id="topicDAO" class="com.forum.dao.impl.BaseDAOimpl">
        <constructor-arg>
            <value>com.forum.model.bean.Topic</value>
        </constructor-arg>
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
    <bean id="messageDAO" class="com.forum.dao.impl.BaseDAOimpl">
        <constructor-arg>
            <value>com.forum.model.bean.Message</value>
        </constructor-arg>
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
    <bean id="ranksDAO" class="com.forum.dao.impl.BaseDAOimpl">
        <constructor-arg>
            <value>com.forum.model.bean.Ranks</value>
        </constructor-arg>
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
        <bean id="attachDAO" class="com.forum.dao.impl.BaseDAOimpl">
        <constructor-arg>
            <value>com.forum.model.bean.Attach</value>
        </constructor-arg>
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

</beans>

---

找不到sessionFactory这个bean