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2.配置applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       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.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">


    <context:property-placeholder location="classpath:db.properties"/>

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <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>

<!--    事務處理:略-->

<!--    aop切面:略-->

    <!--    配置mybatis工廠-->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactory">
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <!--        配置MyBatis的核心配置檔案所在位置-->
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--    介面開發,掃描com.bm.dao包,寫在此包下的介面即可被掃描-->
    <!--mybatis-config.xml配置的mapper就不用寫了-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.bm.dao"/>
    </bean>

    <!--    配置掃描@Service註解-->
    <context:component-scan base-package="com.bm.service"/>
</beans>