《Pro Spring》学习笔记之Bean的继承

SimpleBean.java

 

package ch4_Extends;

public class SimpleBean ...{
  private String name;
  private String sex;
  private String age;
public String getAge() ...{
    return age;
}
public void setAge(String age) ...{
    this.age = age;
}
public String getName() ...{
    return name;
}
public void setName(String name) ...{
    this.name = name;
}
public String getSex() ...{
    return sex;
}
public void setSex(String sex) ...{
    this.sex = sex;
}
}

 applicationContext.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-2.0.xsd">

<bean id="SimpleBean1" class="ch4_Extends.SimpleBean">
<property name="name">
    <value>gaoxiang</value>
  </property>
<property name="sex">
   <value>male</value>
</property>
</bean>


<bean id="SimpleBean2"  class="ch4_Extends.SimpleBean" parent="SimpleBean1">
  <property name="age">
    <value>26</value>
  </property>
</bean>
</beans>

 

测试代码：

 

package ch4_Extends;

import java.io.File;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;






public class TestSpring...{
  public static void main(String args[])  throws Exception...{
      //获取bean factory
      BeanFactory factory=(BeanFactory)getBeanFactory();  //使用子beanFactory
     
      //bean1只有name和sex属性，而bean1继承bean1,不光有自己的age属性，同时继承了name和sex属性
      SimpleBean bean1=(SimpleBean)factory.getBean("SimpleBean1");
      System.out.println(bean1.getName()+" "+bean1.getAge()+" "+bean1.getSex());
      SimpleBean bean2=(SimpleBean)factory.getBean("SimpleBean2");
      System.out.println(bean2.getName()+" "+bean2.getAge()+" "+bean2.getSex());
      
     
  }
  public static BeanDefinitionRegistry getBeanFactory()...{
      //获取bean factory
      String realpath="";
   
         //加载配置项
      realpath=System.getProperty("user.dir")+File.separator+"src"+File.separator+"ch4_Extends"+File.separator+"applicationContext.xml";
  
     
      XmlBeanFactory  factory=new XmlBeanFactory(new FileSystemResource(realpath));
      
      return factory;
  }
}

 

运行结果：

gaoxiang null male
gaoxiang 26 male