applicationContext.xml详解

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applicationContext.xml

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:util="http://www.springframework.org/schema/util"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
	http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

    <!--1.配置包扫描  -->
    <context:component-scan base-package="com.jt"/>

    <!--2.配置数据源  -->

    <!--2.1导入pro配置文件  -->
    <context:property-placeholder location="classpath:/property/jdbc.properties" />

    <!--2.2配置数据源  -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
    </bean>


    <!--3.配置事务控制  -->
    <tx:annotation-driven/>

    <!--3.1 定义事务管理器  -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--3.2 定义事务策略

        propagation="REQUIRED" 执行该操作 必须添加事务
        propagation="SUPPORTS" 事务支持的,原来的操作有事务,则添加事务,
                                    原有的操作没有事务,则不添加事务

        propagation="NEVER"    从不添加事务
        propagation="REQUIRES_NEW"   都会创建一个新的事务
        read-only="true"       该操作只读
      -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="save*"   propagation="REQUIRED"/>
            <tx:method name="delete*" propagation="REQUIRED"/>
            <tx:method name="update*" propagation="REQUIRED"/>
            <tx:method name="find*"   propagation="SUPPORTS" read-only="true"/>
            <tx:method name="*"       propagation="SUPPORTS" read-only="true"/>
        </tx:attributes>
    </tx:advice>

    <!--3.3 定义事务切面
        (pointcut*, advisor*, aspect*)

        expression 切入点表达式
        within(包名.类名)  按类匹配  控制粒度 粗粒度
        execution(返回值类型 包名.类名.方法名(参数列表))
    -->
    <aop:config>
        <aop:pointcut expression="execution(* com.jt.manage.service..*.*(..))" id="pc"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pc"/>
    </aop:config>
</beans>