Bean 继承

用法

App.java

import com.mj.bean.BeanDog;
import com.mj.bean.BeanLife;
import com.mj.bean.BeanSay;
import com.mj.bean.BeanAnimal;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

import java.io.FileNotFoundException;

public class App {



    public static void main(String args[]) throws FileNotFoundException{
        //ClassPathXmlApplicationContext
        ApplicationContext context = new ClassPathXmlApplicationContext("Bean.xml");
        BeanSay sa = (BeanSay) context.getBean("BeanSay");
        sa.setMsg("__Spring");
        sa.talk();

        //FileSystemXmlApplicationContext
        ApplicationContext fileContext = new FileSystemXmlApplicationContext("/src/Bean.xml");
        BeanSay sa1 = (BeanSay) fileContext.getBean("BeanSay");
        sa1.setMsg("=Spring====");
        sa1.talk();

        ApplicationContext animalContext = new ClassPathXmlApplicationContext("Bean.xml");
        BeanAnimal ani =  (BeanAnimal) animalContext.getBean("Animal");
        ani.setAnimalName("dog");
        ani.showAnimal();

        BeanAnimal animal =  (BeanAnimal) animalContext.getBean("Animal");
        animal.setAnimalName("pig");
        animal.showAnimal();

        // init method   destroy method
        BeanLife life = (BeanLife) context.getBean("BeanLife");
        life.showName();

        //BeanDog 继承  BeanAnimal
        BeanDog dog = (BeanDog)context.getBean("BeanDog");
        dog.showAnimal();

    }
}

BeanAnimal.java

package com.mj.bean;

public class BeanAnimal {
    private String animalName = "-animal-";
    private String skin = "-animal skin-";

    public void setAnimalName(String animalName) {
        this.animalName = animalName;
    }

    public void setSkin(String skin) {
        this.skin = skin;
    }

    public  void showAnimal(){
        System.out.println(animalName);
        System.out.println(skin);
    }

    public  void showSkin(){
        System.out.println("=animal skin="+skin);
    }
}

BeanDog.java

package com.mj.bean;

public class BeanDog {

    private String animalName = "";
    private String skin = "";

    public void setSkin(String skin) {
        this.skin = skin;
    }

    public void setAnimalName(String animalName) {
        this.animalName = animalName;
    }

    public void showAnimal(){
        System.out.println(animalName);
        System.out.println(skin);
    }

    public  void init(){

    }

    public void destroy(){

    }
}

Bean.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-3.0.xsd">

    <bean id = "BeanSay" class = "com.mj.bean.BeanSay">
        <property name = "msg" value = "===Spring==="/>
    </bean>

    <!-- scope 为 单例  -->
    <bean id = "Animal" class = "com.mj.bean.BeanAnimal" scope="singleton" >
        <property name = "animalName" value = "(_-_)"/>
        <property name="skin" value="animal skin" />
    </bean>

    <bean id = "BeanLife" class = "com.mj.bean.BeanLife" scope="prototype"  init-method="init" destroy-method="destroy">
        <property name = "beanName" value = "BeanLife"/>
    </bean>

    <bean id="BeanDog"  class="com.mj.bean.BeanDog" parent="Animal">
        <property name="skin" value="=dog skin=" />
    </bean>

</beans>

运行

(_-_)
=dog skin=