Spring6.0官方文档示例：（27）配置文件中bean定义的继承关系

一、实体类

package cn.edu.tju.domain;

public class DerivedTestBean {
    private String name;
    private int age;

    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public void initialize(){
        System.out.println("initialize my bean......");
    }
}

二、配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       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
    http://www.springframework.org/schema/mvc
    http://www.springframework.org/schema/mvc/spring-mvc.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context.xsd">




    <bean id="inheritedTestBeanWithoutClass" abstract="true">
        <property name="name" value="parent"/>
        <property name="age" value="7"/>
    </bean>
    <bean id="inheritsWithClass" class="cn.edu.tju.domain.DerivedTestBean"
          parent="inheritedTestBeanWithoutClass" init-method="initialize">
        <property name="name" value="override"/>
        <!-- age will inherit the value of 1 from the parent bean definition-->
    </bean>




</beans>

三、主类：

package cn.edu.tju.test;

import cn.edu.tju.domain.DerivedTestBean;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test01 {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("spring2.xml");
        DerivedTestBean bean = context.getBean(DerivedTestBean.class);
        System.out.println(bean.getName());
        System.out.println(bean.getAge());

    }
}

四、执行结果