请大神帮帮忙,困扰小弟我一周了.No Hibernate Session bound to thread, and configuration does not.

请大神帮帮忙,困扰我一周了.No Hibernate Session bound to thread, and configuration does not..
自建 springmvc+hibernate 项目

该死的报错:  请大神帮忙!
 No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here

开发工具:
myEclipse 10.0
tomcat 6.0

测试service可以得到结果,使用session如下代码,可以正常从数据库增删改查.

Session session = sessionFactory.getCurrentSession();  //方法一
Session session = sessionFactory.openSession();  //方法二
session.close();

	public static void main(String[] args) {
		ApplicationContext con = new ClassPathXmlApplicationContext("applicationContext.xml");
		StudentService studentService = (StudentService) con.getBean("studentServiceImpl");
		List<ZtStudentLog> list = studentService.getTotalStudent();
		for (ZtStudentLog z : list) {
			System.out.println(z.getUsername()+" "+z.getAge()+" "+z.getId()+" "+z.getSex());
		}	
	}

结果如下:

Hibernate: select this_.ID as ID0_0_, this_.AGE as AGE0_0_, this_.SEX as SEX0_0_, this_.USERNAME as USERNAME0_0_ from ZT_STUDENT_LOG this_
王1 66 1 男
王2 55 2 女
王4 33 4 女
码子 13 5 女
码2 45 3 女

        但是在controller层调用的时候就会出问题,只能用方法二进行查询,增删改会产生相应的sql语句但不能对数据库进行操作,方法一就直接报错 No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here 心都碎了 急死了,下面直接上代码,求大神们帮我看看.

web.xml部分代码:

  <!--  上下文配置文件 -->
  <context-param>
  	<param-name>contextConfigLocation</param-name>
  	<param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  <listener>
  	<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!-- springmvc配置 -->
  <servlet>
  	<servlet-name>springmvc</servlet-name>
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
  	<servlet-name>springmvc</servlet-name>
  	<url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

applicationContext.xml部分代码:

	<context:component-scan base-package="com.pb" />
	<!-- 读取jdbc.properties文件信息,方便更改数据库 -->
	<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="locations">
			<list>
				<value>classpath:jdbc.properties</value>
			</list>
		</property>
	</bean>
	<bean id="dataSource"
		class="org.apache.commons.dbcp.BasicDataSource">
		<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注释写法,不需要写*.hbm.xml了. -->
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
		<property name="dataSource">
			<ref bean="dataSource" />
		</property>
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">${jdbc.hibernate.dialect}</prop>
				<prop key="hibernate.show_sql">${jdbc.hibernate.show_sql}</prop>
				<prop key="hibernate.format_sql">${jdbc.hibernate.format_sql}</prop>
			</props>
		</property>
		<property name="packagesToScan" value="com.pb.model." />
	</bean>
	<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
		<property name="sessionFactory" ref="sessionFactory"></property>
	</bean>
	<tx:advice id="txAdvice" transaction-manager="transactionManager">
		<tx:attributes>
			<tx:method name="get*" propagation="REQUIRED" read-only="true"/>
			<tx:method name="add*" propagation="REQUIRED" />
			<tx:method name="del*" propagation="REQUIRED" />
			<tx:method name="update*" propagation="REQUIRED" />
		</tx:attributes>
	</tx:advice>
	<aop:config >
		<aop:pointcut expression="execution(public * com.pb.service.impl.*.*(..))" id="pointCut"/>