Spring通過AOP實(shí)現(xiàn)聲明式事務(wù)管理。通常通過TransactionProxyFactoryBean設(shè)置Spring事務(wù)代理。我們需要一個(gè)目標(biāo)對(duì)象包裝在事務(wù)代理中。這個(gè)目標(biāo)對(duì)象一般是一個(gè)普通Java對(duì)象的bean。當(dāng)我們定義TransactionProxyFactoryBean時(shí)，必須提供一個(gè)相關(guān)的 PlatformTransactionManager的引用和事務(wù)屬性。 事務(wù)屬性含有上面描述的事務(wù)定義。
PlatformTransactionManager：
HibernateTransactionManager需要一個(gè)SessionFactory的引用
JtaTransactionManager
一．把事務(wù)放置在了DAO層：
<!—hibernateTransactionManager-->
<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
<!—DAO層接口實(shí)現(xiàn)-->
<bean id="companyDAOTarget"
class="com.vstsoft.querycompany.dao.impl.CompanyDAOImpl">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
<!—spring對(duì)DAO層的事務(wù)代理-->
<bean id="companyDAOProxy"
class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<property name="transactionManager">
<ref bean="transactionManager" />
</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>
<!—業(yè)務(wù)層接口實(shí)現(xiàn)，把DAO注入到Service里面-->
<bean name="companyManageTarget"
class="com.vstsoft.querycompany.service.impl.CompanyManageTarget">
<property name="companyDAO">
<ref bean="companyDAOProxy" />
</property>
</bean>
<!—spring對(duì)Service層的代理-->
<bean id="companyManageProxy"
class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="proxyInterfaces">
<value>com.vstsoft.querycompany.service.CompanyManage</value>
</property>
<property name="target">
<ref bean="companyManageTarget" />
</property>
</bean>
<!—配置struts訪問，把service層注入到action里面-->
<bean name="/company"
class="com.vstsoft.querycompany.web.action.CompanyAction" singleton="false">
<property name="companyManage">
<ref local="companyManageProxy" />
</property>
</bean>
二．把事務(wù)放置在了Service層：
<!—jtaTransactionManager-->
<bean id="jtaTransactionManager"
class="org.springframework.transaction.jta.JtaTransactionManager" />
<!—DAO層接口實(shí)現(xiàn)-->
<bean id="companyDAOTarget"
class="com.vstsoft.querycompany.dao.impl.CompanyDAOImpl">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
<!—spring對(duì)DAO層的代理-->
<bean id="companyDAOProxy"
class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="proxyInterfaces">
<value>com.vstsoft.querycompany.dao.CompanyDAO</value>
</property>
<property name="target">
<ref bean="companyDAOTarget" />
</property>
</bean>
<!—業(yè)務(wù)層接口實(shí)現(xiàn)，把DAO注入到Service里面-->
<bean name="companyManageTarget"
class="com.vstsoft.querycompany.service.impl.CompanyManageTarget">
<property name="companyDAO">
<ref bean="companyDAOProxy" />
</property>
</bean>
<!—spring代理業(yè)務(wù)層的事務(wù)管理-->
<bean id="companyManageProxy"
class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<property name="transactionManager">
<ref local="jtaTransactionManager" />
</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訪問，把service層注入到action里面-->
<bean name="/company"
class="com.vstsoft.querycompany.web.action.CompanyAction" singleton="false">
<property name="companyManage">
<ref local="companyManageProxy" />
</property>
</bean>
在service層的接口實(shí)現(xiàn)CompanyManageImpl里面有個(gè)setData方法：按順序執(zhí)行數(shù)據(jù)查詢，數(shù)據(jù)刪除，數(shù)據(jù)插入數(shù)據(jù)庫行為，如果哪一步出異常（運(yùn)行時(shí)異常），事務(wù)回滾，只有所有行為都沒成功，事務(wù)提交。