本文主要是介绍Spring bean inheritance bean 继承，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
Bean definition inheritance
定义一个基类：
package com.myapp.core.inherit;public class Father {private String name;private int age;private String type;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 String getType() {return type;}public void setType(String type) {this.type = type;}public String toString(){return "["+name+","+age+","+type+"]";}}对应的xml配置文件：
<!-- show the bean inheritance just see the following setting --><bean id="father" class="com.myapp.core.inherit.Father" ><property name="name" value="tom"> </property><property name="age" value="50"></property></bean><bean id="son" parent="father"><property name="age" value="24"></property><property name="type" value="child"></property></bean>对应的测试类：
package com.myapp.core.inherit;import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;public class MainTest {public static void main(String[] args) {ApplicationContext context = new ClassPathXmlApplicationContext("SpringBeans.xml");Father son = (Father)context.getBean("son");//Father father = (Father)context.getBean("father");System.out.println(son);
}
}
输出结果：
[tom,24,child]
如果需要把基类定义为模板 需要在基类中加入 abstract="true" 属性
修改后为：
<!-- show the bean inheritance just see the following setting --><bean id="father" class="com.myapp.core.inherit.Father" abstract="true" ><property name="name" value="tom"> </property><property name="age" value="50"></property></bean><bean id="son" parent="father"><property name="age" value="24"></property><property name="type" value="child"></property></bean>定义为抽象的基类不能再获取对象了，因为不可实例化，
Father father = (Father)context.getBean("father");
如果实例化会报如下异常：
Exception in thread "main" org.springframework.beans.factory.BeanIsAbstractException: Error creating bean with name 'father': Bean definition is abstract
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