Spring事务设置的五种方法

副标题#e#

前段时间对Spring的事务设置做了较量深入的研究，在此之间对Spring的事务设置虽说也设置过，可是一直没有一个清楚的认识。通过这次的进修觉察Spring的事务设置只要把思路理清，照旧较量好把握的。

总结如下：

Spring设置文件中关于事务设置老是由三个构成部门，别离是DataSource、TransactionManager和署理机制这三部门，无论哪种设置方法，一般变革的只是署理机制这部门。

DataSource、TransactionManager这两部门只是会按照数据会见方法有所变革，好比利用Hibernate举办数据会见时，DataSource实际为SessionFactory，TransactionManager的实现为HibernateTransactionManager。

详细如下图：

Spring事务配置的五种要领

按照署理机制的差异，总结了五种Spring事务的设置方法，设置文件如下：

第一种方法：每个Bean都有一个署理

<?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"

class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

<property name="configLocation" value="classpath:hibernate.cfg.xml" />

<property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />

</bean>
<!-- 界说事务打点器（声明式的事务） -->

<bean id="transactionManager"

class="org.springframework.orm.hibernate3.HibernateTransactionManager">

<property name="sessionFactory" ref="sessionFactory" />

</bean>
<!-- 设置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">  <property name="transactionManager" ref="transactionManager" /> <property name="target" ref="userDaoTarget" /> <property name="proxyInterfaces" value="com.bluesky.spring.dao.GeneratorDao" />  <property name="transactionAttributes"> <props> <prop key="*">PROPAGATION_REQUIRED</prop> </props> </property> </bean> </beans>

#p#副标题#e#

第二种方法：所有Bean共享一个署理基类


<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>
<!-- 界说事务打点器（声明式的事务） -->

<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">

<!-- 设置事务打点器 -->

<property name="transactionManager" ref="transactionManager" />

<!-- 设置事务属性 -->

<property name="transactionAttributes">

<props>

<prop key="*">PROPAGATION_REQUIRED</prop>

</props>

</property>

</bean>
<!-- 设置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>

第三种方法：利用拦截器

#p#分页标题#e#


<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>
<!-- 界说事务打点器（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" />

<!-- 设置事务属性 -->

<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>

 <bean id="userDao" class="com.bluesky.spring.dao.UserDaoImpl"> <property name="sessionFactory" ref="sessionFactory" /> </bean> </beans>

#p#副标题#e#

第四种方法：利用tx标签设置的拦截器

<?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>
<!-- 界说事务打点器（声明式的事务） -->

<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>

第五种方法：全注解

#p#分页标题#e#

<?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>
<!-- 界说事务打点器（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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