Spring实战之依赖关系注入之后的行为示例

<?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"/>
   <!-- 配置chinese Bean，使用init-method="init"
      指定该Bean所有属性设置完成后，自动执行init方法 -->
   <bean id="chinese" class="org.crazyit.app.service.impl.Chinese"
      init-method="init">
      <property name="axe" ref="steelAxe"/>
   </bean>
</beans>

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

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

package org.crazyit.app.service.impl;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.*;
import org.springframework.context.*;
import org.crazyit.app.service.*;
public class Chinese implements Person , InitializingBean
  , BeanNameAware, ApplicationContextAware
{
  private Axe axe;
  public void setBeanName(String beanName)
  {
    System.out.println("===setBeanName===");
  }
  public void setApplicationContext(ApplicationContext ctx)
  {
    System.out.println("===setApplicationContext===");
  }
  public Chinese()
  {
    System.out.println("Spring实例化主调bean：Chinese实例...");
  }
  // axe的setter方法
  public void setAxe(Axe axe)
  {
    System.out.println("Spring调用setAxe()执行依赖注入...");
    this.axe = axe;
  }
  public void useAxe()
  {
    System.out.println(axe.chop());
  }
  // 测试用的初始化方法
  public void init()
  {
    System.out.println("正在执行初始化方法 init...");
  }
  // 实现InitializingBean接口必须实现的方法
  public void afterPropertiesSet() throws Exception
  {
    System.out.println("正在执行初始化方法 afterPropertiesSet...");
  }
}

package org.crazyit.app.service.impl;
import org.crazyit.app.service.*;
public class SteelAxe
   implements Axe
{
   public SteelAxe()
   {
      System.out.println("Spring实例化依赖bean：SteelAxe实例...");
   }
   public String chop()
   {
      return "钢斧砍柴真快";
   }
}

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