Spring实战——抽象Bean和子Bean

谁借莪１个温暖的怀抱￠ 2021-07-25 02:44 456阅读 0赞

**一 配置**

<?xml version="1.0" encoding="GBK"?>
    <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://www.springframework.org/schema/beans"
         xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans-4.0.xsd">
         
         <bean id="steelAxe"  class="org.crazyit.app.service.impl.SteelAxe"/>
         
         <bean id="personTemplate" abstract="true">
               <property name="name" value="crazyit"/>
               <property name="axe" ref="steelAxe"/>
         </bean>
         
         <bean id="chinese"  class="org.crazyit.app.service.impl.Chinese"
               parent="personTemplate"/>
         <bean id="american"  class="org.crazyit.app.service.impl.American"
               parent="personTemplate"/>
    </beans>

**二 接口**

Axe

package org.crazyit.app.service;
    
    public interface Axe
    {
         public String chop();
    }

Person

package org.crazyit.app.service;
    
    public interface Person
    {
         public void useAxe();
    }

**三 实现类**

1 American

package org.crazyit.app.service.impl;
    import org.crazyit.app.service.*;
    
    public class American implements Person
    {
         private Axe axe;
         private String name;
         public void setAxe(Axe axe)
         {
               System.out.println("Spring执行依赖关系注入...");
               this.axe = axe;
         }
         public void setName(String name)
         {
               this.name = name;
         }
         public void useAxe()
         {
               System.out.println("我是美国人：名字为：" + name
                    + "。正在用斧头" + axe.chop());
         }
    }

2 Chinese

package org.crazyit.app.service.impl;
    import org.crazyit.app.service.*;
    
    public class Chinese implements Person
    {
         private Axe axe;
         private String name;
         public void setAxe(Axe axe)
         {
               System.out.println("Spring执行依赖关系注入...");
               this.axe = axe;
         }
         public void setName(String name)
         {
               this.name = name;
         }
         public void useAxe()
         {
               System.out.println("我是中国人：名字为：" + name
                    + "。正在用斧头" + axe.chop());
         }
    }

3 SteelAxe

package org.crazyit.app.service.impl;
    import org.crazyit.app.service.*;
    
    public class SteelAxe implements Axe
    {
         public String chop()
         {
               return "钢斧砍柴真快";
         }
    }

4 StoneAxe

package org.crazyit.app.service.impl;
    import org.crazyit.app.service.*;
    
    public class StoneAxe implements Axe
    {
         public String chop()
         {
               return "石斧砍柴好慢";
         }
    }

**四 测试类**

package lee;
    
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.*;
    
    
    import org.crazyit.app.service.*;
    
    public class BeanTest
    {
        public static void main(String[] args)
        {
            ApplicationContext ctx = new
                ClassPathXmlApplicationContext("beans.xml");
        }
    }

**五 测试结果**

Spring执行依赖关系注入...
    Spring执行依赖关系注入...