1.创建entity（Apple、Child）

package com.imooc.spring.ioc.entity;

public class Apple
{
    private String title;
    private String color;
    private String origin;

    public Apple()
    {

    }

    public Apple(String title, String color, String origin)
    {
        this.title = title;
        this.color = color;
        this.origin = origin;
    }

    public String getTitle()
    {
        return title;
    }

    public void setTitle(String title)
    {
        this.title = title;
    }

    public String getColor()
    {
        return color;
    }

    public void setColor(String color)
    {
        this.color = color;
    }

    public String getOrigin()
    {
        return origin;
    }

    public void setOrigin(String origin)
    {
        this.origin = origin;
    }
}

package com.imooc.spring.ioc.entity;

public class Child
{
    private String name;
    private Apple apple;

    public Child()
    {
    }

    public Child(String name, Apple apple)
    {
        this.name = name;
        this.apple = apple;
    }

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }

    public Apple getApple()
    {
        return apple;
    }

    public void setApple(Apple apple)
    {
        this.apple = apple;
    }

    public void eat()
    {
        System.out.println(name + "吃到了" + apple.getOrigin() + "种植的" + apple.getTitle());
    }
}

2.在applicationContext.xml中配置

<?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
        https://www.springframework.org/schema/beans/spring-beans.xsd">

    <!--在Ioc容器启动时，自动由Spring实例化Apple对象，取名为sweetApple放到容器中-->
    <bean id="sweetApple" class="com.imooc.spring.ioc.entity.Apple">
        <property name="title" value="红富士"/>
        <property name="origin" value="欧洲"/>
        <property name="color" value="红色"/>
    </bean>

    <bean id="sourApple" class="com.imooc.spring.ioc.entity.Apple">
        <property name="title" value="青苹果"/>
        <property name="origin" value="中亚"/>
        <property name="color" value="绿色"/>
    </bean>

    <bean id="softApple" class="com.imooc.spring.ioc.entity.Apple">
        <property name="title" value="金帅"/>
        <property name="origin" value="中国"/>
        <property name="color" value="黄色"/>
    </bean>

    <bean id="rdApple" class="com.imooc.spring.ioc.entity.Apple">
        <property name="title" value="蛇果"/>
        <property name="origin" value="美国"/>
        <property name="color" value="红色"/>
    </bean>

    <bean id="lily" class="com.imooc.spring.ioc.entity.Child">
        <property name="name" value="莉莉"/>
        <property name="apple" ref="sweetApple"/>
    </bean>

    <bean id="andy" class="com.imooc.spring.ioc.entity.Child">
        <property name="name" value="安迪"/>
        <property name="apple" ref="rdApple"/>
    </bean>

    <bean id="luna" class="com.imooc.spring.ioc.entity.Child">
        <property name="name" value="露娜"/>
        <property name="apple" ref="softApple"/>
    </bean>

</beans>

3.在SpringApplication中测试

package com.imooc.spring.ioc;

import com.imooc.spring.ioc.entity.Apple;
import com.imooc.spring.ioc.entity.Child;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SpringApplication
{
    public static void main(String[] args)
    {
        //创建SpringIoc容器，并根据配置文件在容器中实例化
        ApplicationContext context = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        Apple sweetApple = context.getBean("sweetApple", Apple.class);
        System.out.println(sweetApple.getTitle());
        Child lily = context.getBean("lily", Child.class);
        lily.eat();
        Child andy = context.getBean("andy", Child.class);
        andy.eat();
        Child luna = context.getBean("luna", Child.class);
        luna.eat();
    }
}

4.测试结果