Spring配置文件

Spring配置文件中關於事務配置總是由三個組成部分，分別是DataSource、TransactionManager和代理機制這三部分，無論哪種配置方式，一般變化的只是代理機制這部分。
DataSource、TransactionManager這兩部分只是會根據數據訪問方式有所變化，比如使用Hibernate進行數據訪問時，DataSource實際爲SessionFactory，TransactionManager的實現爲HibernateTransactionManager。
根據代理機制的不同，總結了五種Spring事務的配置方式，配置文件如下：
第一種方式：每個Bean都有一個代理
<?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:aop="http://www.springframework.org/schema/aop"     xmlns:tx="http://www.springframework.org/schema/tx"     xmlns:context="http://www.springframework.org/schema/context"     xsi:schemaLocation="http://www.springframework.org/schema/beans                      http://www.springframework.org/schema/beans/spring-beans.xsd                      http://www.springframework.org/schema/tx                      http://www.springframework.org/schema/tx/spring-tx.xsd                      http://www.springframework.org/schema/aop                      http://www.springframework.org/schema/aop/spring-aop.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>   
 
    <!-- 定義事務管理器（聲明式的事務） -->   
    <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共享一個代理基類
 
<?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:aop="http://www.springframework.org/schema/aop"     xmlns:tx="http://www.springframework.org/schema/tx"     xmlns:context="http://www.springframework.org/schema/context"     xsi:schemaLocation="http://www.springframework.org/schema/beans                      http://www.springframework.org/schema/beans/spring-beans.xsd                      http://www.springframework.org/schema/tx                      http://www.springframework.org/schema/tx/spring-tx.xsd                      http://www.springframework.org/schema/aop                      http://www.springframework.org/schema/aop/spring-aop.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>   
 
    <!-- 定義事務管理器（聲明式的事務） -->   
    <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">   
        <!-- 配置事務管理器 -->   
        <property name="transactionManager" ref="transactionManager" />   
        <!-- 配置事務屬性 -->   
        <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.springframework.org/schema/beans"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xmlns:aop="http://www.springframework.org/schema/aop"     xmlns:tx="http://www.springframework.org/schema/tx"     xmlns:context="http://www.springframework.org/schema/context"     xsi:schemaLocation="http://www.springframework.org/schema/beans                      http://www.springframework.org/schema/beans/spring-beans.xsd                      http://www.springframework.org/schema/tx                      http://www.springframework.org/schema/tx/spring-tx.xsd                      http://www.springframework.org/schema/aop                      http://www.springframework.org/schema/aop/spring-aop.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>   
 
    <!-- 定義事務管理器（聲明式的事務） -->   
    <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標籤配置的攔截器



 
<beans xmlns="http://www.springframework.org/schema/beans"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xmlns:aop="http://www.springframework.org/schema/aop"     xmlns:tx="http://www.springframework.org/schema/tx"     xmlns:context="http://www.springframework.org/schema/context"     xsi:schemaLocation="http://www.springframework.org/schema/beans                      http://www.springframework.org/schema/beans/spring-beans.xsd                      http://www.springframework.org/schema/tx                      http://www.springframework.org/schema/tx/spring-tx.xsd                      http://www.springframework.org/schema/aop                      http://www.springframework.org/schema/aop/spring-aop.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>   
 
    <!-- 定義事務管理器（聲明式的事務） -->   
    <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：全註解

 
<beans xmlns="http://www.springframework.org/schema/beans"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xmlns:aop="http://www.springframework.org/schema/aop"     xmlns:tx="http://www.springframework.org/schema/tx"     xmlns:context="http://www.springframework.org/schema/context"     xsi:schemaLocation="http://www.springframework.org/schema/beans                      http://www.springframework.org/schema/beans/spring-beans.xsd                      http://www.springframework.org/schema/tx                      http://www.springframework.org/schema/tx/spring-tx.xsd                      http://www.springframework.org/schema/aop                      http://www.springframework.org/schema/aop/spring-aop.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>   
 
    <!-- 定義事務管理器（聲明式的事務） -->   
    <bean id="transactionManager" 
        class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
        <property name="sessionFactory" ref="sessionFactory" /> 
    </bean> 
     
</beans> 


此時在DAO上需加上@Transactional註解，如下：



 
package com.test.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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