Spring实战之使用c:命名空间简化配置操作示例

<?xml version="1.0" encoding="GBK"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns="http://www.springframework.org/schema/beans"
   xmlns:c="http://www.springframework.org/schema/c"
   xsi:schemaLocation="http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-4.0.xsd">
   <!-- 配置chinese实例，其实现类是Chinese -->
   <bean id="chinese" class="org.crazyit.app.service.impl.Chinese"
      c:axe-ref="steelAxe" c:age="29"/>
   <!-- 配置chinese实例，其实现类是Chinese -->
   <bean id="chinese2" class="org.crazyit.app.service.impl.Chinese"
      c:_0-ref="stoneAxe" c:_1="29"/>
   <!-- 配置stoneAxe实例，其实现类是StoneAxe -->
   <bean id="stoneAxe" class="org.crazyit.app.service.impl.StoneAxe"/>
   <!-- 配置steelAxe实例，其实现类是SteelAxe -->
   <bean id="steelAxe" class="org.crazyit.app.service.impl.SteelAxe"/>
</beans>

package org.crazyit.app.service;
public interface Axe
{
   // Axe接口里有个砍的方法
   public String chop();
}

package org.crazyit.app.service;
public interface Person
{
   // 定义一个使用斧子的方法
   public void useAxe();
}

package org.crazyit.app.service.impl;
import org.crazyit.app.service.*;
public class Chinese implements Person
{
   private Axe axe;
   private int age;
   public Chinese(){ }
   // axe的setter方法
   public void setAxe(Axe axe)
   {
      this.axe = axe;
   }
   // age的setter方法
   public void setAge(int age)
   {
      this.age = age;
   }
   // 实现Person接口的useAxe()方法
   public void useAxe()
   {
      System.out.println(axe.chop());
      System.out.println("age成员变量的值：" + age);
   }
}

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";
   }
}

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";
   }
}

package lee;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.crazyit.app.service.*;
public class BeanTest
{
  public static void main(String[] args)throws Exception
  {
    // 创建Spring容器
    ApplicationContext ctx = new
      ClassPathXmlApplicationContext("beans.xml");
    // 获取chinese 实例
    Person p = ctx.getBean("chinese" , Person.class);
    // 调用useAxe()方法
    p.useAxe();
    Person p1 = ctx.getBean("chinese2" , Person.class);
    // 调用useAxe()方法
    p1.useAxe();
  }
}