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Spring事务配置的五种方式

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

[html] 

  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.     <bean id="sessionFactory"
  12.             class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
  13.         <property name="configLocation" value="classpath:hibernate.cfg.xml" />
  14.         <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />
  15.     </bean>
  16.     <!-- 定义事务管理器(声明式的事务) -->
  17.     <bean id="transactionManager"
  18.         class="org.springframework.orm.hibernate3.HibernateTransactionManager">
  19.         <property name="sessionFactory" ref="sessionFactory" />
  20.     </bean>
  21.     <!-- 配置DAO -->
  22.     <bean id="userDaoTarget" class="com.bluesky.spring.dao.UserDaoImpl">
  23.         <property name="sessionFactory" ref="sessionFactory" />
  24.     </bean>
  25.     <bean id="userDao"
  26.         class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
  27.            <!-- 配置事务管理器 -->
  28.            <property name="transactionManager" ref="transactionManager" />
  29.         <property name="target" ref="userDaoTarget" />
  30.          <property name="proxyInterfaces" value="com.bluesky.spring.dao.GeneratorDao" />
  31.         <!-- 配置事务属性 -->
  32.         <property name="transactionAttributes">
  33.             <props>
  34.                 <prop key="*">PROPAGATION_REQUIRED</prop>
  35.             </props>
  36.         </property>
  37.     </bean>
  38. </beans>

第二种方式:所有Bean共享一个代理基类

 

[html] 

  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.     <bean id="sessionFactory"
  12.             class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
  13.         <property name="configLocation" value="classpath:hibernate.cfg.xml" />
  14.         <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />
  15.     </bean>
  16.     <!-- 定义事务管理器(声明式的事务) -->
  17.     <bean id="transactionManager"
  18.         class="org.springframework.orm.hibernate3.HibernateTransactionManager">
  19.         <property name="sessionFactory" ref="sessionFactory" />
  20.     </bean>
  21.     <bean id="transactionBase"
  22.             class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"
  23.             lazy-init="true" abstract="true">
  24.         <!-- 配置事务管理器 -->
  25.         <property name="transactionManager" ref="transactionManager" />
  26.         <!-- 配置事务属性 -->
  27.         <property name="transactionAttributes">
  28.             <props>
  29.                 <prop key="*">PROPAGATION_REQUIRED</prop>
  30.             </props>
  31.         </property>
  32.     </bean>
  33.     <!-- 配置DAO -->
  34.     <bean id="userDaoTarget" class="com.bluesky.spring.dao.UserDaoImpl">
  35.         <property name="sessionFactory" ref="sessionFactory" />
  36.     </bean>
  37.     <bean id="userDao" parent="transactionBase" >
  38.         <property name="target" ref="userDaoTarget" />
  39.     </bean>
  40. </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"
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) -->
<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" />
<!-- 配置事务属性 -->
<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"
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) -->
<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<!--tx中属性method定于对于哪些方法定义什么样的规则,像以get开头的读取方法我们一般不加事务,事务也会影响性能,

     read-only定为只能读(其实可以不加),而其他的方法都要加事务-->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="*" propagation="REQUIRED" />
   <tx:method name="get*" read-only="true" propagation="NOT_SUPPORTED" />
</tx:attributes>
</tx:advice>
<!--aop中的变量定义事务的处理对象,在哪个层次的类加事务 -->
<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"
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) -->
<bean id="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:

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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