我配置spring事务为什么不起作用

Question

application.xml 配置-------------------------------<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource" /></bean><bean id="txProxyTemplate" abstract="true" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"><property name="transactionManager" ref="txManager" /><property name="transactionAttributes"><props><prop key="save*">PROPAGATION_REQUIRED</prop><prop key="merge*">PROPAGATION_REQUIRED</prop><prop key="*">PROPAGATION_REQUIRED,readOnly</prop></props></property></bean>service 配置------------------<bean id="loginService" parent="txProxyTemplate"> <property name="target"> <bean class="com.play.login.service.impl.LoginServiceImpl"> <property name="loginDao" ref="loginDao" /></bean> </property> </bean>

Answer 1

事务直接配到DAO上
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>

<bean id="baseTxProxy"
class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"
lazy-init="true" abstract="true">
<property name="transactionManager">
<ref bean="transactionManager" />
</property>
<property name="transactionAttributes">
<props>
<prop key="update*">PROPAGATION_REQUIRED</prop>
</props>
</property>
</bean>

<bean id="studentDaoProxy" parent="baseTxProxy">
<property name="target">
<ref bean="studentDao" />
</property>
</bean>

<bean id="studentDao" class="com.dao.StudentDaoImpl">
<property name="dataSource" ref="dataSource" />
</bean>

StudentDao st = (StudentDao) context.getBean("studentDaoProxy");

两个bean也可以合并为
<bean id="studentDao" parent="baseTxProxy">
<property name="target">
<bean class="com.dao.StudentDaoImpl">
<property name="dataSource" ref="dataSource" />
<property name="kpiDao" ref="kpiDao" />
</bean>
</property>
</bean>
StudentDao st = (StudentDao) context.getBean("studentDao");
上述这种方式必须使用接口，为什么。

第二种同样必须用接口。配置起来比第一种麻烦
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>

<bean id="transactionInterceptor"
class="org.springframework.transaction.interceptor.TransactionInterceptor">
<property name="transactionManager" ref="transactionManager" />
<property name="transactionAttributes">
<props>
<prop key="update*">PROPAGATION_REQUIRED</prop>
</props>
</property>
</bean>
<bean id="studentDaoProxy"
class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="target" ref="studentDao" />
<property name="interceptorNames">
<list>
<value>transactionInterceptor</value>
</list>
</property>
</bean>

<bean id="studentDao" class="com.dao.StudentDaoImpl">
<property name="dataSource" ref="dataSource" />
</bean>
ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
StudentDao st = (StudentDao) context.getBean("studentDaoProxy");

如果使用的都是接口，那么就不需要用cglib-nodep-2.1_3.jar
如果service调dao没有用到接口，那么必须用cglib-nodep-2.1_3.jar