用IOC容器管理mybatis

<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
    http://www.springframework.org/schema/context/spring-context.xsd">
</beans>

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/数据库?serverTimezone=GMT%2B8
jdbc.username=root
jdbc.password=123

<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>

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="mapperLocations" value="classpath*:mapper/*.xml"/>
        <property name="typeAliasesPackage" value="pojo"/>
    </bean>

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="dao" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>

ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("spring/spring-dao.xml");
StudentDao studentDao = (StudentDao) context.getBean("studentDao");
List<Student> students = studentDao.selectAll();