装配Bean（三）

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继承装配：

①继承

②继承配置

③覆盖父Bean配置

④可以设置<bean>的abstract属性为true, Spring不会实例化该Bean

public class Student

public class Gradate extends Student

例子：

package com.hsp.inherit;public class Student {protected String name;protected 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;}}

package com.hsp.inherit;public class Gradate extends Student {private String degree;//*******************************public String getDegree() {return degree;}public void setDegree(String degree) {this.degree = degree;}}

<?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:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"><!-- 配置一个学生对象 --><bean id="student" class="com.hsp.inherit.Student"><property name="name" value="顺平" /><property name="age" value="30" /></bean><!-- 配置Grdate对象 --><bean id="grdate" parent="student" class="com.hsp.inherit.Gradate"><!-- 如果自己配置属性name,age,则会替换从父对象继承的数据 --><property name="name" value="小明" /><property name="degree" value="学士" /></bean></beans>

package com.hsp.inherit;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class App1 {/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubApplicationContext ac=new ClassPathXmlApplicationContext("com/hsp/inherit/beans.xml");Gradate gradate=(Gradate) ac.getBean("grdate");System.out.println(gradate.getName()+" "+gradate.getAge()+" "+gradate.getDegree());}}

小明 30 学士

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