关于 hibernate could not initialize proxy - no Session 问题

用Spring3.2+hibernate4.2搭建开发框架的时候，调用load方法的时候，出现错误：org.hibernate.LazyInitializationException: could not initialize proxy - no Session

 具体配置如下：

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">
        <listener>
        <listener-class> <span></span>org.springframework.web.context.ContextLoaderListener                       </listener-class>
    </listener>
    <listener>
       <listener-class>org.springframework.web.context.request.RequestContextListener                   </listener-class>
    </listener>
    <listener>
        <listener-class>
                     org.springframework.web.util.IntrospectorCleanupListener <span></span></listener-class>
    </listener>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            classpath*:/spring-*.xml
        </param-value>
    </context-param>                                                                          <filter>
 <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>   
 <init-param>
 <param-name>singleSession</param-name>
 <param-value>true</param-value>
 </init-param>
 <init-param>
 <param-name>flushMode</param-name>
 <param-value>auto</param-value>
 </init-param>
 </filter>
 <filter-mapping>
 <filter-name>openSessionInViewFilter</filter-name>
 <url-pattern>*.do</url-pattern>
 </filter-mapping>
 <filter>
 <filter-name>encodingFilter</filter-name>
 <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
 <init-param>
 <param-name>encoding</param-name>
 <param-value>UTF-8</param-value>
 </init-param>
 <init-param>
 <param-name>forceEncoding</param-name>
 <param-value>true</param-value>
 </init-param>
 </filter>
 <filter-mapping>
 <filter-name>encodingFilter</filter-name>
 <url-pattern>/*</url-pattern>
 </filter-mapping>                                                                               <servlet>
 <servlet-name>spring-mvc</servlet-name>
 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
 <init-param>
 <param-name>contextConfigLocation</param-name>
 <param-value>classpath*:/spring-*.xml</param-value>
 </init-param>
 <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
 <servlet-name>default</servlet-name>
 <url-pattern>/js/*</url-pattern>
 </servlet-mapping>
 <servlet-mapping>
 <servlet-name>default</servlet-name>
 <url-pattern>/images/*</url-pattern>
 </servlet-mapping>
 <servlet-mapping>
 <servlet-name>default</servlet-name>
 <url-pattern>/css/*</url-pattern>
 </servlet-mapping>
 <servlet-mapping>
 <servlet-name>default</servlet-name>
 <url-pattern>*.vm</url-pattern>
 </servlet-mapping>
 <servlet-mapping>
 <servlet-name>spring-mvc</servlet-name>
 <url-pattern>*.do</url-pattern>
 </servlet-mapping> <span> <session-config>
 <session-timeout>30</session-timeout>
 </session-config>
 
 
 <welcome-file-list>
 <welcome-file>index.do</welcome-file>
 </welcome-file-list>
</web-app> </span>
spring-mvc-hiberante.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:context="http://www.springframework.org/schema/context" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jpa="http://www.springframework.org/schema/data/jpa"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
        http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd
        http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd"
        default-lazy-init="true">
 
<bean id="sessionFactory"                                                                                class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="hibernateProperties">
        <props>
          <prop key="hibernate.dialect">${hibernate.dialect}</prop>
         <prop key="hibernate.hbm2ddl.auto">none</prop>
         <prop key="hibernate.show_sql">true</prop>
         <prop key="hibernate.format_sql">true</prop>
         <prop key="hibernate.temp.use_jdbc_metadata_defaults">false</prop>
         <prop key="hibernate.current_session_context_class">                                                  org.springframework.orm.hibernate4.SpringSessionContext                                    </prop>
        </props>
        </property>
     
        <property name="mappingLocations">
           <list>
             <value>
              classpath:/com/test/aaa/entity/**/*.hbm.xml
              </value>
            </list>
        </property>
    </bean>
       <bean name="transactionManager"                                                                     class= "org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    <tx:annotation-driven transaction-manager="transactionManager" />