spring事务的配置

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。

具体如下图：

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

<?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.xsd       http://www.springframework.org/schema/context       http://www.springframework.org/schema/context/spring-context-2.5.xsd       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"><bean id="sessionFactory"         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） --> <bean id="transactionManager"    ref="sessionFactory" /></bean><!-- 配置DAO --><bean id="userDaoTarget" ref="sessionFactory" /></bean><bean id="userDao"     ref="transactionManager" />     <property name="target" ref="userDaoTarget" />      <property name="proxyInterfaces" value="com.bluesky.spring.dao.GeneratorDao" />    <!-- 配置事务属性 -->     <property name="transactionAttributes">         <props>             <prop key="*">PROPAGATION_REQUIRED</prop>        </props>     </property> </bean> </beans>

?

第二种方式：所有Bean共享一个代理基类

<?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.xsd       http://www.springframework.org/schema/context       http://www.springframework.org/schema/context/spring-context-2.5.xsd       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"><bean id="sessionFactory"         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） --> <bean id="transactionManager"    ref="sessionFactory" /></bean><bean id="transactionBase"                 lazy-init="true" abstract="true">     <!-- 配置事务管理器 -->     <property name="transactionManager" ref="transactionManager" />     <!-- 配置事务属性 -->     <property name="transactionAttributes">         <props>             <prop key="*">PROPAGATION_REQUIRED</prop>         </props>     </property> </bean>  <!-- 配置DAO --><bean id="userDaoTarget" 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

<?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.xsd       http://www.springframework.org/schema/context       http://www.springframework.org/schema/context/spring-context-2.5.xsd       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"><bean id="sessionFactory"         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） --> <bean id="transactionManager"    ref="sessionFactory" /></bean>   <bean id="transactionInterceptor"     ref="transactionManager" />     <!-- 配置事务属性 -->     <property name="transactionAttributes">         <props>             <prop key="*">PROPAGATION_REQUIRED</prop>         </props>     </property> </bean>  <bean ref="sessionFactory" /></bean></beans>

?

第四种方式：使用tx标签配置的拦截器

<?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.xsd       http://www.springframework.org/schema/context       http://www.springframework.org/schema/context/spring-context-2.5.xsd       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd       http://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"         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） --> <bean id="transactionManager"    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>

?

第五种方式：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.xsd       http://www.springframework.org/schema/context       http://www.springframework.org/schema/context/spring-context-2.5.xsd       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd       http://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"         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） --> <bean id="transactionManager"    ref="sessionFactory" /></bean></beans>

?

此时在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();}}

?

查看更多 下一篇