spring配置datasource三种方式

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：
Java代码  收藏代码

        第一种方式：每个Bean都有一个代理 
    <?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: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> 
     
        第二种方式：所有Bean共享一个代理基类 
     
    <?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> 
     
    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: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(); 
        } 
         
          
    }