[SSH]关于AfterReturningAdvice的一个问题！！高手速进！！！

问题描述：在AfterReturningAdvice的实现类的afterReturning方法中查询失败
spring配置

	<!-- TransactionManager -->

	<bean id="hibTransactionManager"

		class="org.springframework.orm.hibernate3.HibernateTransactionManager">

		<property name="sessionFactory" ref="sessionFactory" />

	</bean>

	<tx:advice id="txAdvice" transaction-manager="hibTransactionManager">

		<tx:attributes>

			<tx:method name="add*" propagation="REQUIRED" />

			<tx:method name="del*" propagation="REQUIRED" />

			<tx:method name="update*" propagation="REQUIRED" />

			<tx:method name="select*" propagation="REQUIRED"/>

			<tx:method name="search*" propagation="REQUIRED"/>

			<tx:method name="insert*" propagation="REQUIRED" />

			<tx:method name="do*" propagation="REQUIRED" />

			<tx:method name="*" propagation="SUPPORTS" read-only="true" />

		</tx:attributes>

	</tx:advice>

	<aop:config>

		<aop:pointcut expression="execution(* biz.*.*(..))"

			id="bizMethods" />

		<aop:advisor advice-ref="txAdvice" pointcut-ref="bizMethods" />

	</aop:config>

	<!--

		********************************我是很长的分割线********************************

	-->

	<!-- Dao -->

	<bean id="petDiaryDao" class="dao.impl.hib.PetDiaryDaoHibImpl">

		<property name="sessionFactory" ref="sessionFactory" />

	</bean>

	<bean id="petInfoDao" class="dao.impl.hib.PetInfoDaoHibImpl">

		<property name="sessionFactory" ref="sessionFactory" />

	</bean>

	<!--

		********************************我是很长的分割线********************************

	-->

	<!-- Biz -->

	<bean id="petDiaryBizTarget" class="biz.impl.PetDiaryBizImpl">

		<property name="petDiaryDao" ref="petDiaryDao" />

	</bean>

	<bean id="petInfoBizTarget" class="impl.PetInfoBizImpl">

		<property name="petInfoDao" ref="petInfoDao" />

	</bean>

	<!--

		********************************我是很长的分割线********************************

	-->

	<!-- Advice -->

	<bean id="lotteryAdvice" class="advice.LotteryAdvice">

		<property name="petInfoBiz" ref="petInfoBizTarget" />

	</bean>



	<bean id="petInfoBiz" class="org.springframework.aop.framework.ProxyFactoryBean">

		<property name="proxyInterfaces" value="biz.PetInfoBiz" />

		<property name="interceptorNames" value="lotteryAdvice" />

		<property name="target" ref="petInfoBizTarget" />

	</bean>

	<bean id="petDiaryBiz" class="org.springframework.aop.framework.ProxyFactoryBean">

		<property name="ProxyInterfaces" value="biz.PetDiaryBiz" />

		<property name="interceptorNames" value="lotteryAdvice" />

		<property name="target" ref="petDiaryBizTarget" />

	</bean>

LotteryAdvice类

         private PetInfoBiz petInfoBiz = null;



	public void setPetInfoBiz(PetInfoBiz petInfoBiz) {

		this.petInfoBiz = petInfoBiz;

	}



	public void afterReturning(Object resultValue, Method method,

			Object[] args, Object target) throws Throwable {

			PetDiary petDiary = (PetDiary)args[0];

			PetInfo petInfo = this.petInfoBiz.selectPetInfo(petDiary.getPetInfo().getPetId());//这里petInfo的值全部为空,并且SQL语句也不输出(petId有值,且在数据库中存在)

			petInfo.setPetCute(petInfo.getPetCute()+10);

			petInfo.setPetLove(petInfo.getPetLove()+10);

			this.petInfoBiz.updatePet(petInfo);

			System.out.println("["+petInfo.getPetName()+"]聪明+10,爱心+10");

		

	}

selectPetInfo方法

public PetInfo select(int pid) {

		return (PetInfo) super.getHibernateTemplate().get(PetInfo.class, pid);

	}

结果报null异常

org.springframework.dao.DataIntegrityViolationException: not-null property references a null or transient value: entity.PetInfo.petName; nested exception is org.hibernate.PropertyValueException: not-null property references a null or transient value: entity.PetInfo.petName

最后说明：在其她类调用该方法能取到值！！郁闷啊、谁能告诉我！！