即使openSessionInViewInterceptor,LazyInitializationException

Question

即使我正在使用openSessionInViewInterceptor,我也遇到了LazyInitializationException的问题.我已经阅读了很多关于该主题的帖子,我尝试了三到四种不同的方法.

首先,我不想在Hibernate配置文件中将lazzy属性设置为false.所以,我想要解决这个问题.我使用的是Spring 2.5,Hibernate 3,Netbeans和Tomcat.

我的实现如下:

servlet.xml中

<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="interceptors">
            <list>
                <ref bean="openSessionInViewInterceptor" />
            </list>
        </property>
        <property name="mappings">
            <props>
                <prop key="/index.htm">indexController</prop>
            </props>
        </property>
 </bean>
 <bean id ="openSessionInViewInterceptor" name="openSessionInViewInterceptor"
    class="org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor">
    <property name="sessionFactory">
        <ref bean="sessionFactory" />
    </property>
</bean>

applicationContext.xml中

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="dataSource">
            <ref local="dataSource"/>
        </property>
        <property name="mappingResources">
            <list>
                <value>TasquesDAOHibernate/Model/Tasca.hbm.xml</value>
                <value>TasquesDAOHibernate/Model/TipusTasca.hbm.xml</value>
                <value>TasquesDAOHibernate/Model/Prioritat.hbm.xml</value>
                <value>TasquesDAOHibernate/Model/Persona.hbm.xml</value>
                <value>TasquesDAOHibernate/Model/EstatTasca.hbm.xml</value>
                <value>TasquesDAOHibernate/Model/Usuari.hbm.xml</value>
                <value>TasquesDAOHibernate/Model/LogActivitat.hbm.xml</value>
                <value>TasquesDAOHibernate/Model/ObjecteSIPANUsuari.hbm.xml</value>
            </list>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">${hibernate.dialect}</prop>
                <prop key="hibernate.jdbc.batch_size">0</prop>
            </props>
        </property>
    </bean>


    <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory">
            <ref local="sessionFactory"/>
        </property>
    </bean>

    <bean id="tasquesDAO" class="TasquesDAOHibernate.TasquesDAOHibernate">
        <property name="sessionFactory">
            <ref local="sessionFactory"/>
        </property>
    </bean>

<bean id="tasquesService" name="tasquesService" class="Tasques_www.service.TasquesService" >
        <property name="tasquesDAO">
            <ref local="tasquesDAO"/>
        </property>
        <property name="transactionManager" ref="transactionManager"/>
    </bean>

TasquesService.java

public List<Tasca> getTasques() {
        List<Tasca> tasques = (List)this.transactionTemplate.execute(new           TransactionCallback() {

            public Object doInTransaction(TransactionStatus status) {
                Object tasques = tasquesDAO.getTasques();
                return tasques;
            }
        });
        return tasques;
    }

TasquesDAOHibernate.java

public List<Tasca> getTasques() {
        Session session = this.sessionFactory.getCurrentSession();
        try{
            Query query = session.createQuery("SELECT element FROM Tasca AS element");
            List result = query.list();
            return result;
        }catch(HibernateException ex){
            return null;
        }
    }

我认为那些是重要文件.我已经尝试了很多东西,而且我总是得到LazyInitializationException或

org.hibernate.HibernateException:没有Hibernate会话绑定到线程,配置不允许在这里创建非事务性的...

我不知道哪一个最差.

提前致谢!

Answer 1

我认为您需要web.xml级别的过滤器：

<filter>
    <filter-name>Spring OpenEntityManagerInViewFilter</filter-name>
    <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
</filter>

只有这样，spring 才能知道你的视图何时被渲染。