Spring注解型事务配置

Spring配置文件中关于事务配置总是由三个组成部分，分别是DataSource、TransactionManager和代理机制这三部分，无论哪种配置方式，一般变化的只是代理机制这部分。

DataSource、 TransactionManager这两部分只是会根据数据访问方式有所变化，比如使用Hibernate进行数据访问时，DataSource实际为 SessionFactory，TransactionManager的实现为HibernateTransactionManager。

Spring注解型事务配置

根据代理机制的不同，总结了五种Spring事务的配置方式，配置文件如下：

第一种方式：每个Bean都有一个代理

Java代码
# <beanid="sessionFactory"
# class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
# <property name="configLocation"value="classpath:hibernate.cfg.xml"/>
# <property name="configurationClass"value="org.hibernate.cfg.AnnotationConfiguration"/>
# </bean>
#
# <!-- 定义事务管理器（声明式的事务）-->
# <beanid="transactionManager"
# class="org.springframework.orm.hibernate3.HibernateTransactionManager">
# <property name="sessionFactory" ref="sessionFactory"/>
# </bean>
#
# <!-- 配置DAO-->
# <bean id="userDaoTarget"class="com.bluesky.spring.dao.UserDaoImpl">
# <property name="sessionFactory" ref="sessionFactory"/>
# </bean>
#
# <beanid="userDao"
# class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
# <!-- 配置事务管理器-->
# <property name="transactionManager"ref="transactionManager"/>
# <property name="target" ref="userDaoTarget"/>
# <property name="proxyInterfaces"value="com.bluesky.spring.dao.GeneratorDao"/>
# <!-- 配置事务属性-->
# <propertyname="transactionAttributes">
# <props>
# <propkey="*">PROPAGATION_REQUIRED</prop>
# </props>
# </property>
# </bean>
# lt;/beans>

第二种方式：所有Bean共享一个代理基类

Java代码
# <beanid="sessionFactory"
# class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
# <property name="configLocation"value="classpath:hibernate.cfg.xml"/>
# <property name="configurationClass"value="org.hibernate.cfg.AnnotationConfiguration"/>
# </bean>
#
# <!-- 定义事务管理器（声明式的事务）-->
# <beanid="transactionManager"
# class="org.springframework.orm.hibernate3.HibernateTransactionManager">
# <property name="sessionFactory" ref="sessionFactory"/>
# </bean>
#
# <beanid="transactionBase"
# class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"
# lazy-init="true"abstract="true">
# <!-- 配置事务管理器-->
# <property name="transactionManager"ref="transactionManager"/>
# <!-- 配置事务属性-->
# <propertyname="transactionAttributes">
# <props>
# <propkey="*">PROPAGATION_REQUIRED</prop>
# </props>
# </property>
# </bean>
#
# <!-- 配置DAO-->
# <bean id="userDaoTarget"class="com.bluesky.spring.dao.UserDaoImpl">
# <property name="sessionFactory" ref="sessionFactory"/>
# </bean>
#
# <bean id="userDao" parent="transactionBase">
# <property name="target" ref="userDaoTarget"/>
# </bean>
# </beans>

第三种方式：使用拦截器

Java代码
# <beanid="sessionFactory"
# class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
# <property name="configLocation"value="classpath:hibernate.cfg.xml"/>
# <property name="configurationClass"value="org.hibernate.cfg.AnnotationConfiguration"/>
# </bean>
#
# <!-- 定义事务管理器（声明式的事务）-->
# <beanid="transactionManager"
# class="org.springframework.orm.hibernate3.HibernateTransactionManager">
# <property name="sessionFactory" ref="sessionFactory"/>
# </bean>
#
# <beanid="transactionInterceptor"
# class="org.springframework.transaction.interceptor.TransactionInterceptor">
# <property name="transactionManager"ref="transactionManager"/>
# <!-- 配置事务属性-->
# <propertyname="transactionAttributes">
# <props>
# <propkey="*">PROPAGATION_REQUIRED</prop>
# </props>
# </property>
# </bean>
#
# <beanclass="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
# <propertyname="beanNames">
# <list>
# <value>*Dao</value>
# </list>
# </property>
# <propertyname="interceptorNames">
# <list>
# <value>transactionInterceptor</value>
# </list>
# </property>
# </bean>
#
# <!-- 配置DAO-->
# <bean id="userDao"class="com.bluesky.spring.dao.UserDaoImpl">
# <property name="sessionFactory" ref="sessionFactory"/>
# </bean>
# </beans>

第四种方式：使用tx标签配置的拦截器

Java代码
# <context:annotation-config/>
# <context:component-scan base-package="com.bluesky"/>
#
# <beanid="sessionFactory"
# class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
# <property name="configLocation"value="classpath:hibernate.cfg.xml"/>
# <property name="configurationClass"value="org.hibernate.cfg.AnnotationConfiguration"/>
# </bean>
#
# <!-- 定义事务管理器（声明式的事务）-->
# <beanid="transactionManager"
# class="org.springframework.orm.hibernate3.HibernateTransactionManager">
# <property name="sessionFactory" ref="sessionFactory"/>
# </bean>
#
# <tx:advice id="txAdvice"transaction-manager="transactionManager">
# <tx:attributes>
# <tx:method name="*" propagation="REQUIRED"/>
# </tx:attributes>
# </tx:advice>
#
# <aop:config>
# <aop:pointcutid="interceptorPointCuts"
# expression="execution(* com.bluesky.spring.dao.*.*(..))"/>
# <aop:advisoradvice-ref="txAdvice"
# pointcut-ref="interceptorPointCuts"/>
# </aop:config>
# </beans>

第五种方式：全注解

Java代码
# <context:annotation-config/>
# <context:component-scan base-package="com.bluesky"/>
#
# <tx:annotation-driventransaction-manager="transactionManager"/>
#
# <beanid="sessionFactory"
# class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
# <property name="configLocation"value="classpath:hibernate.cfg.xml"/>
# <property name="configurationClass"value="org.hibernate.cfg.AnnotationConfiguration"/>
# </bean>
#
# <!-- 定义事务管理器（声明式的事务）-->
# <beanid="transactionManager"
# class="org.springframework.orm.hibernate3.HibernateTransactionManager">
# <property name="sessionFactory" ref="sessionFactory"/>
# </bean>
#
# </beans>

此时在DAO上需加上@Transactional注解，如下：

Java代码
# packagecom.bluesky.spring.dao;
#
# importjava.util.List;
#
# importorg.hibernate.SessionFactory;
# importorg.springframework.beans.factory.annotation.Autowired;
# importorg.springframework.orm.hibernate3.support.HibernateDaoSupport;
# importorg.springframework.stereotype.Component;
#
# importcom.bluesky.spring.domain.User;
#
# @Transactional
# @Component("userDao")
# public class UserDaoImpl extends HibernateDaoSupport implementsUserDao {
#
# publicList<User> listUsers(){
# returnthis.getSession().createQuery("fromUser").list();
# }
#
#
# }