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前段时间对Spring的事务配置做了比较深入的研究,在此之间对Spring的事务配置虽说也配置过,但是一直没有一个清楚的认识。通过这次的学习发觉Spring的事务配置只要把思路理清,还是比较好掌握的。

总结如下:

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:

Spring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

  1. <?xml version="1.0" encoding="UTF-8"?> 
  2. <beans xmlns="http://www.springframework.org/schema/beans" 
  3.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
  4.     xmlns:context="http://www.springframework.org/schema/context" 
  5.     xmlns:aop="http://www.springframework.org/schema/aop" 
  6.     xsi:schemaLocation="http://www.springframework.org/schema/beans 
  7.            http://www.springframework.org/schema/beans/spring-beans-2.5.xsd 
  8.            http://www.springframework.org/schema/context 
  9.            http://www.springframework.org/schema/context/spring-context-2.5.xsd 
  10.            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"> 
  11.  
  12.     <bean id="sessionFactory"  
  13.             class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">  
  14.         <property name="configLocation" value="classpath:hibernate.cfg.xml" />  
  15.         <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> 
  16.     </bean>  
  17.  
  18.     <!-- 定义事务管理器(声明式的事务) -->  
  19.     <bean id="transactionManager" 
  20.         class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
  21.         <property name="sessionFactory" ref="sessionFactory" /> 
  22.     </bean> 
  23.     
  24.     <!-- 配置DAO --> 
  25.     <bean id="userDaoTarget" class="com.bluesky.spring.dao.UserDaoImpl"> 
  26.         <property name="sessionFactory" ref="sessionFactory" /> 
  27.     </bean> 
  28.     
  29.     <bean id="userDao"  
  30.         class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">  
  31.            <!-- 配置事务管理器 -->  
  32.            <property name="transactionManager" ref="transactionManager" />     
  33.         <property name="target" ref="userDaoTarget" />  
  34.          <property name="proxyInterfaces" value="com.bluesky.spring.dao.GeneratorDao" /> 
  35.         <!-- 配置事务属性 -->  
  36.         <property name="transactionAttributes">  
  37.             <props>  
  38.                 <prop key="*">PROPAGATION_REQUIRED</prop> 
  39.             </props>  
  40.         </property>  
  41.     </bean>  
  42. </beans> 

第二种方式:所有Bean共享一个代理基类

  1. <?xml version="1.0" encoding="UTF-8"?> 
  2. <beans xmlns="http://www.springframework.org/schema/beans" 
  3.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
  4.     xmlns:context="http://www.springframework.org/schema/context" 
  5.     xmlns:aop="http://www.springframework.org/schema/aop" 
  6.     xsi:schemaLocation="http://www.springframework.org/schema/beans 
  7.            http://www.springframework.org/schema/beans/spring-beans-2.5.xsd 
  8.            http://www.springframework.org/schema/context 
  9.            http://www.springframework.org/schema/context/spring-context-2.5.xsd 
  10.            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"> 
  11.  
  12.     <bean id="sessionFactory"  
  13.             class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">  
  14.         <property name="configLocation" value="classpath:hibernate.cfg.xml" />  
  15.         <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> 
  16.     </bean>  
  17.  
  18.     <!-- 定义事务管理器(声明式的事务) -->  
  19.     <bean id="transactionManager" 
  20.         class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
  21.         <property name="sessionFactory" ref="sessionFactory" /> 
  22.     </bean> 
  23.     
  24.     <bean id="transactionBase"  
  25.             class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"  
  26.             lazy-init="true" abstract="true">  
  27.         <!-- 配置事务管理器 -->  
  28.         <property name="transactionManager" ref="transactionManager" />  
  29.         <!-- 配置事务属性 -->  
  30.         <property name="transactionAttributes">  
  31.             <props>  
  32.                 <prop key="*">PROPAGATION_REQUIRED</prop>  
  33.             </props>  
  34.         </property>  
  35.     </bean>    
  36.    
  37.     <!-- 配置DAO --> 
  38.     <bean id="userDaoTarget" class="com.bluesky.spring.dao.UserDaoImpl"> 
  39.         <property name="sessionFactory" ref="sessionFactory" /> 
  40.     </bean> 
  41.     
  42.     <bean id="userDao" parent="transactionBase" >  
  43.         <property name="target" ref="userDaoTarget" />   
  44.     </bean> 
  45. </beans> 

第三种方式:使用拦截器

  1. <?xml version="1.0" encoding="UTF-8"?> 
  2. <beans xmlns="http://www.springframework.org/schema/beans" 
  3.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
  4.     xmlns:context="http://www.springframework.org/schema/context" 
  5.     xmlns:aop="http://www.springframework.org/schema/aop" 
  6.     xsi:schemaLocation="http://www.springframework.org/schema/beans 
  7.            http://www.springframework.org/schema/beans/spring-beans-2.5.xsd 
  8.            http://www.springframework.org/schema/context 
  9.            http://www.springframework.org/schema/context/spring-context-2.5.xsd 
  10.            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"> 
  11.  
  12.     <bean id="sessionFactory"  
  13.             class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">  
  14.         <property name="configLocation" value="classpath:hibernate.cfg.xml" />  
  15.         <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> 
  16.     </bean>  
  17.  
  18.     <!-- 定义事务管理器(声明式的事务) -->  
  19.     <bean id="transactionManager" 
  20.         class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
  21.         <property name="sessionFactory" ref="sessionFactory" /> 
  22.     </bean>  
  23.    
  24.     <bean id="transactionInterceptor"  
  25.         class="org.springframework.transaction.interceptor.TransactionInterceptor">  
  26.         <property name="transactionManager" ref="transactionManager" />  
  27.         <!-- 配置事务属性 -->  
  28.         <property name="transactionAttributes">  
  29.             <props>  
  30.                 <prop key="*">PROPAGATION_REQUIRED</prop>  
  31.             </props>  
  32.         </property>  
  33.     </bean> 
  34.       
  35.     <bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">  
  36.         <property name="beanNames">  
  37.             <list>  
  38.                 <value>*Dao</value> 
  39.             </list>  
  40.         </property>  
  41.         <property name="interceptorNames">  
  42.             <list>  
  43.                 <value>transactionInterceptor</value>  
  44.             </list>  
  45.         </property>  
  46.     </bean>  
  47.   
  48.     <!-- 配置DAO --> 
  49.     <bean id="userDao" class="com.bluesky.spring.dao.UserDaoImpl"> 
  50.         <property name="sessionFactory" ref="sessionFactory" /> 
  51.     </bean> 
  52. </beans> 

第四种方式:使用tx标签配置的拦截器

  1. <?xml version="1.0" encoding="UTF-8"?> 
  2. <beans xmlns="http://www.springframework.org/schema/beans" 
  3.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
  4.     xmlns:context="http://www.springframework.org/schema/context" 
  5.     xmlns:aop="http://www.springframework.org/schema/aop" 
  6.     xmlns:tx="http://www.springframework.org/schema/tx" 
  7.     xsi:schemaLocation="http://www.springframework.org/schema/beans 
  8.            http://www.springframework.org/schema/beans/spring-beans-2.5.xsd 
  9.            http://www.springframework.org/schema/context 
  10.            http://www.springframework.org/schema/context/spring-context-2.5.xsd 
  11.            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd 
  12.            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> 
  13.  
  14.     <context:annotation-config /> 
  15.     <context:component-scan base-package="com.bluesky" /> 
  16.  
  17.     <bean id="sessionFactory"  
  18.             class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">  
  19.         <property name="configLocation" value="classpath:hibernate.cfg.xml" />  
  20.         <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> 
  21.     </bean>  
  22.  
  23.     <!-- 定义事务管理器(声明式的事务) -->  
  24.     <bean id="transactionManager" 
  25.         class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
  26.         <property name="sessionFactory" ref="sessionFactory" /> 
  27.     </bean> 
  28.  
  29.     <tx:advice id="txAdvice" transaction-manager="transactionManager"> 
  30.         <tx:attributes> 
  31.             <tx:method name="*" propagation="REQUIRED" /> 
  32.         </tx:attributes> 
  33.     </tx:advice> 
  34.     
  35.     <aop:config> 
  36.         <aop:pointcut id="interceptorPointCuts" 
  37.             expression="execution(* com.bluesky.spring.dao.*.*(..))" /> 
  38.         <aop:advisor advice-ref="txAdvice" 
  39.             pointcut-ref="interceptorPointCuts" />        
  40.     </aop:config>      
  41. </beans> 

第五种方式:全注解

  1. <?xml version="1.0" encoding="UTF-8"?> 
  2. <beans xmlns="http://www.springframework.org/schema/beans" 
  3.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
  4.     xmlns:context="http://www.springframework.org/schema/context" 
  5.     xmlns:aop="http://www.springframework.org/schema/aop" 
  6.     xmlns:tx="http://www.springframework.org/schema/tx" 
  7.     xsi:schemaLocation="http://www.springframework.org/schema/beans 
  8.            http://www.springframework.org/schema/beans/spring-beans-2.5.xsd 
  9.            http://www.springframework.org/schema/context 
  10.            http://www.springframework.org/schema/context/spring-context-2.5.xsd 
  11.            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd 
  12.            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> 
  13.  
  14.     <context:annotation-config /> 
  15.     <context:component-scan base-package="com.bluesky" /> 
  16.  
  17.     <tx:annotation-driven transaction-manager="transactionManager"/> 
  18.  
  19.     <bean id="sessionFactory"  
  20.             class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">  
  21.         <property name="configLocation" value="classpath:hibernate.cfg.xml" />  
  22.         <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> 
  23.     </bean>  
  24.  
  25.     <!-- 定义事务管理器(声明式的事务) -->  
  26.     <bean id="transactionManager" 
  27.         class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
  28.         <property name="sessionFactory" ref="sessionFactory" /> 
  29.     </bean> 
  30.     
  31. </beans> 

此时在DAO上需加上@Transactional注解,如下:

  1. package com.dawnsky.spring.dao; 
  2.  
  3. import java.util.List; 
  4.  
  5. import org.hibernate.SessionFactory; 
  6. import org.springframework.beans.factory.annotation.Autowired; 
  7. import org.springframework.orm.hibernate3.support.HibernateDaoSupport; 
  8. import org.springframework.stereotype.Component; 
  9.  
  10. import com.bluesky.spring.domain.User; 
  11.  
  12. @Transactional 
  13. @Component("userDao"
  14. public class UserDaoImpl extends HibernateDaoSupport implements UserDao { 
  15.  
  16.     public List<User> listUsers() { 
  17.         return this.getSession().createQuery("from User").list(); 
  18.     } 

原文链接:http://dawn-sky.iteye.com/blog/1277270

posted on 2011-11-27 13:29 hellxoul 阅读(254) 评论(0)  编辑  收藏 所属分类: Spring2.5

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