Spring transaction don't work? not allow creation of non-transactional

[lyo]

Hi everyone:

I want to use spring declare transaction.when I run my jsp,tomcat throw exception:

org.hibernate.HibernateException: No Hibernate Session bound to thread, and conf
iguration does not allow creation of non-transactional one here
        at org.springframework.orm.hibernate3.AbstractSessionFactoryBean$Transac
tionAwareInvocationHandler.invoke(AbstractSessionFactoryBean.java:296)
        at $Proxy1.getCurrentSession(Unknown Source)
        at com.liferay.portlet.lyo.service.persistence.TestUtil.testquery(TestUt
il.java:54)
        at org.apache.jsp.html.portlet.login.view_jsp._jspService(view_jsp.java:
316)

My spring config is:

<bean id="com.liferay.portlet.lyo.service.persistence.TestUtil" class="com.liferay.portlet.lyo.service.persistence.TestUtil" lazy-init="true">
		
		<property name="sessionFactory">
			<ref bean="liferaySessionFactory" />
		</property>
	</bean>
<bean id="myProductService"
      class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" lazy-init="true">
    <property name="transactionManager" ref="liferayTransactionManager"/>
    <property name="target">
      <bean class="com.liferay.portlet.lyo.service.persistence.TestUtil">
      </bean>
    </property>
    <property name="transactionAttributes">
      <props>
        <prop key="test*">PROPAGATION_REQUIRED,readOnly</prop>
      </props>
    </property>
  </bean>

My java code:

public  static List testquery(){
		List list=new ArrayList();
		TestUtil tu=new TestUtil();
		Session hsession=tu.getSessionFactory().getCurrentSession();
		list=hsession.createQuery("from com.liferay.portal.model.impl.UserImpl as u").list();
		hsession.close();
		return list;
		
	}

My test code:

org.springframework.context.ApplicationContext ctx
        = new org.springframework.context.support.ClassPathXmlApplicationContext(new String []{"META-INF/ext-spring-professional.xml","classpath*:META-INF/portal-spring-professional.xml","classpath*:META-INF/counter-spring-professional.xml"});
		Object objBean=ctx.getBean("com.liferay.portlet.lyo.service.persistence.TestUtil");
		out.println("get bean: "+objBean);
com.liferay.portlet.lyo.service.persistence.TestUtil th=(com.liferay.portlet.lyo.service.persistence.TestUtil)objBean;
java.util.List list=th.testquery();

If I change the "getCurrentSession()" to "openSession()" ,it could work property.So the reason is that the transaction don't take effect. But why?
Is there any mistake in my code? Thks!