Spring配置文件中關(guān)于事務(wù)配置總是由三個組成部分，分別是DataSource、TransactionManager和代理機(jī)制這三部分，無論哪種配置方式，一般變化的只是代理機(jī)制這部分。

??? DataSource、TransactionManager這兩部分只是會根據(jù)數(shù)據(jù)訪問方式有所變化，比如使用Hibernate進(jìn)行數(shù)據(jù)訪問時，DataSource實(shí)際為SessionFactory，TransactionManager的實(shí)現(xiàn)為HibernateTransactionManager。

具體如下圖：

?根據(jù)代理機(jī)制的不同，總結(jié)了五種Spring事務(wù)的配置方式，配置文件如下：

?第一種方式：每個Bean都有一個代理

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-2.5.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"><bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="configLocation" value="classpath:hibernate.cfg.xml" /> <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /></bean> <!-- 定義事務(wù)管理器（聲明式的事務(wù)） --> <bean id="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><bean id="userDao" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"> <!-- 配置事務(wù)管理器 --> <property name="transactionManager" ref="transactionManager" /> <property name="target" ref="userDaoTarget" /> <property name="proxyInterfaces" value="com.bluesky.spring.dao.GeneratorDao" /><!-- 配置事務(wù)屬性 --> <property name="transactionAttributes"> <props> <prop key="*">PROPAGATION_REQUIRED</prop></props> </property> </bean> </beans>

第二種方式：所有Bean共享一個代理基類

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-2.5.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"><bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="configLocation" value="classpath:hibernate.cfg.xml" /> <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /></bean> <!-- 定義事務(wù)管理器（聲明式的事務(wù)） --> <bean id="transactionManager"class="org.springframework.orm.hibernate3.HibernateTransactionManager"><property name="sessionFactory" ref="sessionFactory" /></bean><bean id="transactionBase" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" lazy-init="true" abstract="true"> <!-- 配置事務(wù)管理器 --> <property name="transactionManager" ref="transactionManager" /> <!-- 配置事務(wù)屬性 --> <property name="transactionAttributes"> <props> <prop key="*">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>

第三種方式：使用攔截器

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-2.5.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"><bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="configLocation" value="classpath:hibernate.cfg.xml" /> <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /></bean> <!-- 定義事務(wù)管理器（聲明式的事務(wù)） --> <bean id="transactionManager"class="org.springframework.orm.hibernate3.HibernateTransactionManager"><property name="sessionFactory" ref="sessionFactory" /></bean> <bean id="transactionInterceptor" class="org.springframework.transaction.interceptor.TransactionInterceptor"> <property name="transactionManager" ref="transactionManager" /> <!-- 配置事務(wù)屬性 --> <property name="transactionAttributes"> <props> <prop key="*">PROPAGATION_REQUIRED</prop> </props> </property> </bean><bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator"> <property name="beanNames"> <list> <value>*Dao</value></list> </property> <property name="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>

第四種方式：使用tx標(biāo)簽配置的攔截器

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-2.5.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"><context:annotation-config /><context:component-scan base-package="com.bluesky" /><bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="configLocation" value="classpath:hibernate.cfg.xml" /> <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /></bean> <!-- 定義事務(wù)管理器（聲明式的事務(wù)） --> <bean id="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:pointcut id="interceptorPointCuts"expression="execution(* com.bluesky.spring.dao.*.*(..))" /><aop:advisor advice-ref="txAdvice"pointcut-ref="interceptorPointCuts" /> </aop:config> </beans>

第五種方式：全注解

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-2.5.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"><context:annotation-config /><context:component-scan base-package="com.bluesky" /><tx:annotation-driven transaction-manager="transactionManager"/><bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="configLocation" value="classpath:hibernate.cfg.xml" /> <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /></bean> <!-- 定義事務(wù)管理器（聲明式的事務(wù)） --> <bean id="transactionManager"class="org.springframework.orm.hibernate3.HibernateTransactionManager"><property name="sessionFactory" ref="sessionFactory" /></bean></beans>

此時在DAO上需加上@Transactional注解，如下：

package com.bluesky.spring.dao;import java.util.List;import org.hibernate.SessionFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.orm.hibernate3.support.HibernateDaoSupport; import org.springframework.stereotype.Component;import com.bluesky.spring.domain.User;@Transactional @Component("userDao") public class UserDaoImpl extends HibernateDaoSupport implements UserDao {public List<User> listUsers() {return this.getSession().createQuery("from User").list();}}

?

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