java

1.package spring.chapter2.setDemo;  
2.import org.springframework.context.ApplicationContext;  
3.import org.springframework.context.support.ClassPathXmlApplicationContext;  
4.  
5.  
6.public class SpringTest {  
7.public static void main(String args[]){  
8.    ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");  
9.    Role role =(Role)ac.getBean("role");  
10.    System.out.println("人物名称："+role.getName()+"   血量: "+role.getHealth());  
11.}  
12.package spring.chapter2.setDemo;  
13.import java.lang.reflect.*;  
14.import org.springframework.beans.BeansException;  
15.import org.springframework.beans.factory.config.BeanPostProcessor;  
16.  
17.public class HealthModifier implements BeanPostProcessor {  
18./*//游戏外挂么！@ 
19. *  
20. *  
21. *  
22. *  
23. *  
24. *  
25.*/  public Object postProcessAfterInitialization(Object bean,String name)throws BeansException  
26.    {  
27.        //获取bean中所有的属性  
28.        Field[] fields =bean.getClass().getDeclaredFields();  
29.        for(int i=0;i<fields.length;i++)  
30.            //由于role中只有一个int字段且就是health，这里只需要进行一个简单的类型判断  
31.            if(fields[i].getType().equals(int.class)){  
32.                //这句非常重要，因为Role中所有字段是private的，这里设置可以访问  
33.                fields[i].setAccessible(true);  
34.                try{  
35.                    //获得系统设定的health值  
36.                    int health =(Integer)fields[i].get(bean);  
37.                    //修改人物生命值，增加100  
38.                    fields[i].set(bean,health+300);  
39.                }catch(IllegalAccessException e)  
40.                {  
41.                    e.printStackTrace();  
42.                }  
43.            }  
44.          
45.        System.out.println("****after******");  
46.  
47.        return bean;  
48.    }  
49.  
50.    @Override  
51.    public Object postProcessBeforeInitialization(Object bean, String beanName)  
52.            throws BeansException {  
53.        // TODO Auto-generated method stub  
54.        System.out.println("++++before++");  
55.        return bean;  
56.          
57.    }  
58.      
59.}  
60.<?xml version="1.0" encoding="UTF-8"?>  
61.<beans xmlns="http://www.springframework.org/schema/beans"  
62.    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"  
63.    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">  
64.  
65.    <bean id="medicine" class="spring.chapter2.setDemo.Medicine">  
66.        <property name="name" value="小药丸" />  
67.        <property name="blood" value="10" />  
68.    </bean>  
69.    <bean id="role" class="spring.chapter2.setDemo.Role">  
70.        <property name="name" value="Mary" />  
71.        <property name="health" value="100" />  
72.        <property name="goods">  
73.            <list>  
74.                <ref bean="medicine" />  
75.            </list>  
76.        </property>  
77.    </bean>  
78.  
79.    <bean id="healthModifier" class="spring.chapter2.setDemo.HealthModifier"/>  
80.</beans>  
81.<!-- 在Spring.xml里有几个id  则BeanPostProcessor调用几次 -->  }