beans.xml中的问题
<!-- 事务切面 -->
<bean id="tx" class="org.springframework.transaction.interceptor.transactioninterceptor">
<property name="transactionmanager" ref="tm"></property>
<property name="transactionattributes">
<props>
<prop key="reg">propagation_required</prop>
<prop key="task_*">propagation_required</prop>
<prop key="*">propagation_required</prop>
</props>
</property>
</bean>
加上红色部分语句就ok了!