spring事务配置是在业务逻辑层还是dao层？
spring事务配置是在业务逻辑层还是dao层？
业务逻辑层和dao层都可以配置事务处理，如果一个service调用多个dao，它们如果是一个事务，那么事务应该配置业务逻辑层，否则配置在dao层就可以了。
配置到dao层
<bean id="customerDaoProxy"
/>
</property>
<property name="target">
<ref local="customerDao" />
</property>
<property name="transactionAttributes">
<props>
<prop key="add*">PROPAGATION_REQUIRED</prop>
<prop key="create*">PROPAGATION_REQUIRED</prop>
<prop key="update*">PROPAGATION_REQUIRED</prop>
<prop key="delete*">PROPAGATION_REQUIRED</prop>
<prop key="query*">PROPAGATION_REQUIRED,readOnly</prop>
</props>
</property>
配置到service层
<bean id="serviceProxy"
/>
</property>
<property name="target">
<ref local="customerService" />
</property>
<property name="transactionAttributes">
<props>
<prop key="add*">PROPAGATION_REQUIRED</prop>
<prop key="create*">PROPAGATION_REQUIRED</prop>
<prop key="update*">PROPAGATION_REQUIRED</prop>
<prop key="delete*">PROPAGATION_REQUIRED</prop>
<prop key="query*">PROPAGATION_REQUIRED,readOnly</prop>
</props>
</property>
