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:
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
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<?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>
<!-- 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" >
<!-- 配置事务管理器 -->
<property name= "transactionManager" ref= "transactionManager" />
<property name= "target" ref= "userDaoTarget" />
<property name= "proxyInterfaces" value= "com.bluesky.spring.dao.GeneratorDao" />
<!-- 配置事务属性 -->
<property name= "transactionAttributes" >
<props>
<prop key= "*" > PROPAGATION_REQUIRED </prop>
</props>
</property>
</bean>
</beans>
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第二种方式:所有Bean共享一个代理基类
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<?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= "transactionBase"
class = "org.springframework.transaction.interceptor.TransactionProxyFactoryBean"
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" class = "com.bluesky.spring.dao.UserDaoImpl" >
<property name= "sessionFactory" ref= "sessionFactory" />
</bean>
<bean id= "userDao" parent= "transactionBase" >
<property name= "target" ref= "userDaoTarget" />
</bean>
</beans>
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第三种方式:使用拦截器
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<? 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 >
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第四种方式:使用tx标签配置的拦截器
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<? 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: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 >
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第五种方式:全注解
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<? 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 >
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此时在DAO上需加上@Transactional注解,如下:
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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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以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://www.blogjava.net/libin2722/articles/264190.html