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前段時(shí)間對(duì)Spring的事務(wù)配置做了比較深入的研究，在此之間對(duì)Spring的事務(wù)配置雖說(shuō)也配置過(guò),，但是一直沒(méi)有一個(gè)清楚的認(rèn)識(shí),。通過(guò)這次的學(xué)習(xí)發(fā)覺(jué)Spring的事務(wù)配置只要把思路理清，還是比較好掌握的,。 總結(jié)如下： Spring配置文件中關(guān)于事務(wù)配置總是由三個(gè)組成部分,，分別是DataSource、TransactionManager和代理機(jī)制這三部分,，無(wú)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(huì)根據(jù)數(shù)據(jù)訪問(wèn)方式有所變化,，比如使用Hibernate進(jìn)行數(shù)據(jù)訪問(wèn)時(shí)，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(gè)Bean都有一個(gè)代理 <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www./schema/beans" xmlns:xsi="http://www./2001/XMLSchema-instance" xmlns:context="http://www./schema/context" xmlns:aop="http://www./schema/aop" xsi:schemaLocation="http://www./schema/beans http://www./schema/beans/spring-beans-2.5.xsd http://www./schema/context http://www./schema/context/spring-context-2.5.xsd http://www./schema/aop http://www./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(gè)代理基類 <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www./schema/beans" xmlns:xsi="http://www./2001/XMLSchema-instance" xmlns:context="http://www./schema/context" xmlns:aop="http://www./schema/aop" xsi:schemaLocation="http://www./schema/beans http://www./schema/beans/spring-beans-2.5.xsd http://www./schema/context http://www./schema/context/spring-context-2.5.xsd http://www./schema/aop http://www./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./schema/beans" xmlns:xsi="http://www./2001/XMLSchema-instance" xmlns:context="http://www./schema/context" xmlns:aop="http://www./schema/aop" xsi:schemaLocation="http://www./schema/beans http://www./schema/beans/spring-beans-2.5.xsd http://www./schema/context http://www./schema/context/spring-context-2.5.xsd http://www./schema/aop http://www./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./schema/beans" xmlns:xsi="http://www./2001/XMLSchema-instance" xmlns:context="http://www./schema/context" xmlns:aop="http://www./schema/aop" xmlns:tx="http://www./schema/tx" xsi:schemaLocation="http://www./schema/beans http://www./schema/beans/spring-beans-2.5.xsd http://www./schema/context http://www./schema/context/spring-context-2.5.xsd http://www./schema/aop http://www./schema/aop/spring-aop-2.5.xsd http://www./schema/tx http://www./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./schema/beans" xmlns:xsi="http://www./2001/XMLSchema-instance" xmlns:context="http://www./schema/context" xmlns:aop="http://www./schema/aop" xmlns:tx="http://www./schema/tx" xsi:schemaLocation="http://www./schema/beans http://www./schema/beans/spring-beans-2.5.xsd http://www./schema/context http://www./schema/context/spring-context-2.5.xsd http://www./schema/aop http://www./schema/aop/spring-aop-2.5.xsd http://www./schema/tx http://www./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(shí)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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