application.xml

<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

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

    <!--    声明数据源-->
    <bean id="myDataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

    <!--声明 sqlSessionFactory-->
    <bean id="factory" class="org.mybatis.spring.sqlSessionfactorybean">
        <!--指定数据源-->
        <property name="dataSource" ref="myDataSource"/>
        <property name="configLocation" value="classpath:mybatis.xml"/>
    </bean>

    <!--    创建所有的dao对象-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="sqlSessionfactorybeanName" value="factory"/>
        <property name="basePackage" value="dao的全限定包名"/>
    </bean>

    <!--创建service-->
    <bean id="studentService" class="com.zx.service.impl.StudentServiceImpl">
        <property name="dao名" ref="dao名首字母小写"/>
    </bean>
    
</beans>