spring-bean的依赖和继承

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<?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:p="http://www.springframework.org/schema/p"    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">    <!-- 抽象bean,abstract属性为true的bean不能被实例化，只用来被继承 -->    <bean id="address" class="com.dasenlin.test.springmodel.autowire.Address"    p:city="Beijing" p:street="WuKeSong" abstract="true"></bean>    <bean id="address2" p:city="ShangHai" parent="address" p:street="KunSa"></bean>    <!-- bean之间的依赖 ,我现在要求person必须依赖于某个Car,虽然不会直接将这个值赋予person,但是没哟car的话会报错-->    <bean id="car" class="com.dasenlin.test.springmodel.autowire.Car"    p:brand="Bmw" p:price="123000.00"></bean>    <bean id="person" class="com.dasenlin.test.springmodel.autowire.Person"    p:address-ref="address2" depends-on="car"></bean></beans>

java 部分

package com.dasenlin.test.springmodel.parent;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.dasenlin.test.springmodel.autowire.Address;import com.dasenlin.test.springmodel.autowire.Person;public class Main {    public static void main(String[] args) {        ApplicationContext ctx = new ClassPathXmlApplicationContext("bean-relation.xml");        /*Address address = (Address) ctx.getBean("address");        System.out.println(address);*/        Address address = (Address) ctx.getBean("address2");        System.out.println(address);        Person person = (Person) ctx.getBean("person");        System.out.println(person);    }}

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