[转]Spring事宜配置在DAO和Service层

[转]Spring事务配置在DAO和Service层
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<!—hibernateTransactionManager--><bean id="transactionManager" /> </property></bean><!—DAO层接口实现--><bean id="companyDAOTarget" /> </property></bean><!—spring对DAO层的事务代理--><bean id="companyDAOProxy" /> </property> <property name="target"> <ref local="companyDAOTarget" /> </property> <property name="transactionAttributes"> <props> <prop key="insert*">PROPAGATION_REQUIRED</prop> <prop key="delete*">PROPAGATION_REQUIRED</prop> <prop key="find*"> PROPAGATION_REQUIRED,readOnly </prop> </props> </property></bean><!—业务层接口实现，把DAO注入到Service里面--><bean name="companyManageTarget" /> </property></bean><!—spring对Service层的代理--><bean id="companyManageProxy" /> </property></bean><!—配置struts访问，把service层注入到action里面--><bean name="/company" singleton="false"> <property name="companyManage"> <ref local="companyManageProxy" /> </property></bean>



二．把事务放置在了Service层：

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<!—jtaTransactionManager--><bean id="jtaTransactionManager" /><!—DAO层接口实现--><bean id="companyDAOTarget" /> </property></bean><!—spring对DAO层的代理--><bean id="companyDAOProxy" /> </property></bean><!—业务层接口实现，把DAO注入到Service里面--><bean name="companyManageTarget" /> </property></bean><!—spring代理业务层的事务管理--><bean id="companyManageProxy" /> </property> <property name="transactionAttributes"> <props> <prop key="set*">PROPAGATION_REQUIRED</prop> <prop key="find*">PROPAGATION_REQUIRED,readOnly</prop> </props> </property> <property name="target"> <ref bean="companyManageTarget" /> </property></bean><!—配置struts访问，把service层注入到action里面--><bean name="/company" singleton="false"> <property name="companyManage"> <ref local="companyManageProxy" /> </property></bean>



例如：在service层的接口实现CompanyManageImpl里面有个setData方法：按顺序执行对数据库的数据查询，数据删除，数据插入数据库，如果哪一步出异常（运行时异常），以上三个操作都将事务回滚。