Ioc配置——import导入配置文件

<?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"
       xmlns:p="http://www.springframework.org/schema/p"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://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="classpath:data.properties" />

    <beans>
        <import resource="applicationContext-user.xml" />
        <import resource="applicationContext-student.xml"/>
    </beans>
</beans>

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

    <bean id="userDao" class="com.hw.dao.impl.UserDaoImpl"/>

    <bean id="userService" class="com.hw.service.impl.UserServiceImpl">
        <property name="userDao" ref="userDao" />
        <property name="studentDao" ref="studentDao" />
    </bean>
</beans>

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

    <bean id="studentDao" class="com.hw.dao.impl.StudentDaoImpl"/>

</beans>

import com.hw.dao.StudentDao;
import com.hw.dao.UserDao;
import com.hw.service.UserService;

public class UserServiceImpl implements UserService {

    private UserDao userDao;
    private StudentDao studentDao;

    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }

    public void setStudentDao(StudentDao studentDao) {
        this.studentDao = studentDao;
    }

    @Override
    public void save() {
        System.out.println("userServiceImpl save runing...");
        userDao.save();
        studentDao.study();
    }
}