spring aop 异常处理 Spring框架IOC容器和AOP解析(3)

有几点需要说明：

⑴ pointcut中的三个"*"中，第一个*代表返回值，第二*代表service下子包，第三个*代表方法名，“（..）”代表方法参数。

⑵ 此时配置的切点在Service层，方法命名需要按照以上advice通知点开头命名。

⑶ 按照规定命名方法，会受到Spring事务的管控，保持操作的一致性。例如向插入100条数据，前面99条记录都正常执行直至第100条出现错误，则事务管控会回滚到执行前的初始状态。

2、使用Bean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:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context.xsd
      http://www.springframework.org/schema/tx 
      http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
      http://www.springframework.org/schema/aop 
      http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"
      default-autowire="default">
    
    <!-- <bean name="userManager" class="com.tgb.manager.UserManagerImpl"></bean>
    <bean name="userController" class="com.tgb.web.UserController">
        <property name="userManager" ref="userManager"></property>
    </bean> -->
    <context:component-scan base-package="com.tgb.dao" />
    <context:component-scan base-package="com.tgb.entity" />
    <context:component-scan base-package="com.tgb.manager" />
    <context:component-scan base-package="com.tgb.web" />
    
    <!-- 引入init.properties中属性 -->
    <bean id="placeholderConfig" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
        <list>
            <value>classpath:config/spring/jdbc.properties</value>
        </list>
        </property>
    </bean>
    
    <!-- 配置数据源，连接池使用c3p0,详细信息参见hibernate官方文档"基础配置章节" -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" >
        <property name="driverClass" value="${datasource.driverClassName}"></property>
        <property name="jdbcUrl" value="${datasource.url}"></property>
        <property name="user" value="${datasource.username}"></property>
        <property name="password" value="${datasource.password}"></property>
    </bean>
    
    <!-- 配置SessionFactory -->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">
                    ${hibernate.dialect}
                </prop>
                <prop key="hibernate.show_sql"> 
                    ${hibernate.show_sql} 
                </prop>
                <prop key="hibernate.jdbc.fetch_size">
                    ${hibernate.jdbc.fetch_size}
                </prop>
                <prop key="hibernate.jdbc.batch_size">
                    ${hibernate.jdbc.batch_size}
                </prop>
                <prop key="hibernate.connection.release_mode">
                    ${hibernate.connection.release_mode}
                </prop>
                <prop key="hibernate.format_sql">
                    ${hibernate.format_sql}
                </prop>
                <prop key="hibernate.connection.SetBigStringTryClob">true</prop>
            </props>
        </property>
        <!-- anotation注解扫描实体类  -->
        <property name="annotatedClasses">
            <list>
                <value>com.tgb.entity.User</value>
            </list>
        </property>
    </bean>

    <!-- 配置一个事务管理器 将事务与Hibernate关联-->
    <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"/>
    </bean>
    
    <!-- 配置事务范围，使用代理的方式 -->
    <bean id="transactionProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" abstract="true">  
        <!--   为事务代理bean注入事务管理器--> 
        <property name="transactionManager" >
            <ref bean="transactionManager"/>
        </property>  
         <!--设置事务属性范围-->  
        <property name="transactionAttributes">  
            <props>  
                <prop key="add*">PROPAGATION_REQUIRED,-Exception</prop>  
                <prop key="get">PROPAGATION_REQUIRED,-Exception</prop> 
                <prop key="update*">PROPAGATION_REQUIRED,-myException</prop>  
                <prop key="del*">PROPAGATION_REQUIRED</prop>  
                <prop key="*">PROPAGATION_REQUIRED</prop>      
            </props>  
        </property>  
    </bean> 
    
    <bean id="userDao" class="com.tgb.dao.UserDaoImpl">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>

    <bean id="userManagerBase" class="com.tgb.manager.UserManagerImpl">
        <property name="userDao" ref="userDao"></property>
    </bean>
    
    <!-- 此处为代理 -->
    <bean name="userManager" parent="transactionProxy">
        <property name="target" ref="userManagerBase"></property>
    </bean>    
     
</beans>

参考链接：

简单理解——面向切面编程（AOP）

AOP 实现原理

spring事务配置的五种方式

Spring声明式事务配置管理方法

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