spring配置的继承

注意：此方式类上是没有继承关系的，只是配置上的继承。
可以设置 <bean> 的abstract 属性为 true, Spring 不会实例化该Bean

<?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-2.5.xsd">
           
    <!-- 抽象bean，专门为继承用。通过继承,parent对象、child对象将base的属性及属性值都继承下来了 -->
    <bean id="base" abstract="true">
    	<property name="id" value="1"/>
		<property name="name" value="tom"/>
    </bean>
    
	<bean id="parent" parent="base" class="cn.itcast.spring.inherit.Parent"/>
	
	<bean id="child" parent="base" class="cn.itcast.spring.inherit.Child">
		<property name="age" value="25"/>
	</bean>
</beans>

public class Parent {
	private Integer id;
	private String name;

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

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

public class Child {
	private Integer id;
	private String name;
	private Integer age;

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

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

	public Integer getAge() {
		return age;
	}

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