1.创建applicationContext.xml文件和beans2.xml文件

1. beans2.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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
          http://www.springframework.org/schema/beans/spring-beans.xsd">
    <!-- 使用spring来创建对象，在spring这些都称为bean -->
    <bean id="hello" class="com.lixv.entity.Hello">
        <constructor-arg index="0" value="xxxxxxxxxxxx"/>
    </bean>
    <bean id="helloSpring" class="com.lixv.entity.HelloSpring" name="helloSpringNew1,helloSpringNew2">
        <property name="springStr" value="springstr"/>
        <property name="hello" ref="hello"/>
    </bean>
    <alias name="helloSpring" alias="helloSpringNew"/>
</beans>

2. applicationContext.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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
          http://www.springframework.org/schema/beans/spring-beans.xsd">
   <import resource="beans2.xml"/>
   <import resource="beans.xml"/>
</beans>

3. import可以将其他beans中的bean添加过来
4. 当导入多个beans，其中有相同的bean（对象）时，spring会自动将其合并
5. 当import多个beans，其中的bean拥有相同的id，但是对象属性不同时。通过getBean("helloSpringNew1")获取这个id会得到最后import的beans中的bean（后面import的会覆盖先import的）

2.测试代码

package com.lixv.dao;

import com.lixv.entity.Hello;
import com.lixv.entity.HelloSpring;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestSpring {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        HelloSpring hellospring1 = (HelloSpring) context.getBean("helloSpringNew1");
        System.out.println(hellospring1);
    }
}

3.运行结果