事务处理类，需要使用事务的方法前缀必须与下面的前缀相同
<property name="transactionAttributes"> <props> <prop key="delete*">PROPAGATION_REQUIRED, ISOLATION_READ_COMMITTED</prop> <prop key="insert*">PROPAGATION_REQUIRED, ISOLATION_READ_COMMITTED</prop> <prop key="add*">PROPAGATION_REQUIRED, ISOLATION_READ_COMMITTED</prop> <prop key="update*">PROPAGATION_REQUIRED, ISOLATION_READ_COMMITTED</prop> <prop key="save*">PROPAGATION_REQUIRED, ISOLATION_READ_COMMITTED</prop> <prop key="find*">PROPAGATION_REQUIRED,readOnly</prop> </props> </property>
