Spring实战之协调作用域不同步的Bean操作示例

<?xml version="1.0" encoding="GBK"?>

   
      
      
   
   
   
      
   

package org.crazyit.app.service;
public interface Dog
{
   public String run();
}

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

package org.crazyit.app.service.impl;
import org.crazyit.app.service.*;
public class GunDog implements Dog
{
   private String name;
   public void setName(String name)
   {
      this.name = name;
   }
   public String getName()
   {
      return name;
   }
   public String run()
   {
      return "我是一只叫" + getName()
        + "的猎犬，奔跑迅速..." ;
   }
}

package org.crazyit.app.service.impl;
import org.crazyit.app.service.*;
public abstract class Chinese implements Person
{
   private Dog dog;
   // 定义抽象方法，该方法用于获取被依赖Bean
   public abstract Dog getDog();
   public void hunt()
   {
      System.out.println("我带着：" + getDog() + "出去打猎");
      System.out.println(getDog().run());
   }
}

package lee;
import org.springframework.context.*;
import org.springframework.context.support.*;
import org.crazyit.app.service.*;
public class SpringTest
{
  public static void main(String[] args)
  {
    // 以类加载路径下的beans.xml作为配置文件，创建Spring容器
    ApplicationContext ctx = new
      ClassPathXmlApplicationContext("beans.xml");
    Person p1 = ctx.getBean("chinese" , Person.class);
    Person p2 = ctx.getBean("chinese" , Person.class);
    // 由于chinese Bean是singleton行为，
    // 因此程序两次获取的chinese Bean是同一个实例。
    System.out.println(p1 == p2);
    p1.hunt();
    p2.hunt();
  }
}