使用HibernateTemplagte发生错误时事务没有回滚

@Transactionalpublic class Dao implements DaoIn{    private HibernateTemplate template;    public void save(Student s){        try{            template.save(s);            throw new RuntimeException();        } catch(RuntimeException e) {            e.printStackTrace();        }     }    public HibernateTemplate getTemplate() {        return template;    }    public void setTemplate(HibernateTemplate template) {        this.template = template;    }}

public class SpringAction extends ActionSupport{    private Student stu = new Student();    private DaoIn dao;    public String execute()throws Exception{        stu.setName("111");        stu.setStuclassid(8);        dao.save(stu);        //this.wait();        return SUCCESS;    }//省略get,set

<tx:annotation-driven/><bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">        <property name="sessionFactory" ref="sessionFactory" />    </bean><bean id="SpringAction" class="test.web.SpringStruts2Hibernate.Action.SpringAction"        scope="prototype">        <property name="dao" ref="dao" />    </bean>    <bean id="dao" class="test.web.SpringStruts2Hibernate.DAOImpl.Dao">        <property name="template" ref="hibernateTemplate" />    </bean><!--省略数据源的配置信息-->