spring开发_BeanFactoryPostProcessor_容器后处理器

项目结构：

http://www.cnblogs.com/hongten/gallery/image/112611.html

/spring_1700_容器后处理器/src/com/b510/app/test/SpringTest.java

package com.b510.app.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.b510.service.AnimalService;

/**
 * 测试类
 * 
 * @author Hongten
 * 
 */
public class SpringTest {
    public static void main(String[] args) {
        ApplicationContext act = new ClassPathXmlApplicationContext("beans.xml");
        // 获取id为animaleServiceOfDog的Bean
        AnimalService animalServiceOfDog = (AnimalService) act
                .getBean("animaleServiceOfDog");
        animalServiceOfDog.getInfo();
        // 获取id为animaleServiceOfCat的Bean
        AnimalService animalServiceOfCat = (AnimalService) act
                .getBean("animaleServiceOfCat");
        animalServiceOfCat.getInfo();
    }
}

/spring_1700_容器后处理器/src/com/b510/app/util/MyBeanFactoryPostProcessor.java

package com.b510.app.util;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;

/**
 * 容器后处理类，实现BeanFactoryPostProcessor接口
 * 
 * @author Hongten
 * 
 */
public class MyBeanFactoryPostProcessor implements BeanFactoryPostProcessor {
    /**
     * 重写该方法，对Spring进行后处理。
     * 
     * @param beanFactory
     *            Spring容器本身
     */
    public void postProcessBeanFactory(
            ConfigurableListableBeanFactory beanFactory) throws BeansException {
        System.out.println("比较一下上面信息********************");
        System.out.println("Spring容器是：" + beanFactory);
        System.out.println("比较一下下面信息********************");
    }
}

/spring_1700_容器后处理器/src/com/b510/service/AnimalService.java

package com.b510.service;

/**
 * 动物抽象类
 * 
 * @author Hongten
 * 
 */
public interface AnimalService {

    /**
     * 获取相关信息
*/
    public abstract void getInfo();

}

/spring_1700_容器后处理器/src/com/b510/service/MeatService.java

package com.b510.service;

/**
 * 定义抽象类MeatService肉类
 * 
 * @author Hongten
 * 
 */
public interface MeatService {

    /**
     * 定义方法whatMeat
     * 
     * @return 返回一个字符串
*/
    public abstract String whatMeat();
}

/spring_1700_容器后处理器/src/com/b510/service/impl/CatServiceBean.java

package com.b510.service.impl;

import com.b510.service.AnimalService;
import com.b510.service.MeatService;

/**
 * 定义猫类实现AnimaleService抽象类
 * 
 * @author Hongten
 * 
 */
public class CatServiceBean implements AnimalService {
    private int age;
    private MeatService meatService;

    public CatServiceBean(){
        System.out.println("猫类被初始化了");
    }

    public int getAge() {
        return age;
    }

    @Override
    public void getInfo() {
        System.out.println("我是猫，我的年龄是:"+age+",我很喜欢吃"+meatService.whatMeat());
    }
    public MeatService getMeatService() {
        return meatService;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public void setMeatService(MeatService meatService) {
        this.meatService = meatService;
    }
    

}

/spring_1700_容器后处理器/src/com/b510/service/impl/DogServiceBean.java

package com.b510.service.impl;

import com.b510.service.AnimalService;
import com.b510.service.MeatService;

/**
 * 定义DogServiceBean类
 * 
 * @author Hongten
 * 
 */
public class DogServiceBean implements AnimalService {
    private int age;
    private MeatService meatService;

    public DogServiceBean() {
        System.out.println("狗类被初始化了");
    }

    public int getAge() {
        return age;
    }

    @Override
    public void getInfo() {
        System.out.println("我是狗，我的年龄是:" + age + ",我很喜欢吃"
                + meatService.whatMeat());
    }

    public MeatService getMeatService() {
        return meatService;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public void setMeatService(MeatService meatService) {
        this.meatService = meatService;
    }

}

/spring_1700_容器后处理器/src/com/b510/service/impl/FishServiceBean.java

package com.b510.service.impl;

import com.b510.service.MeatService;

/**
 * 定义鱼肉实现MeatService抽象类
 * 
 * @author Hongten
 * 
 */
public class FishServiceBean implements MeatService {

    public FishServiceBean(){
        System.out.println("鱼肉类被初始化了");
    }
    @Override
    public String whatMeat() {
        return "鱼肉";
    }

}

/spring_1700_容器后处理器/src/com/b510/service/impl/PorkServiceBean.java

package com.b510.service.impl;

import com.b510.service.MeatService;

/**
 * 定义猪肉实现MeatService抽象类
 * 
 * @author Hongten
 * 
 */
public class PorkServiceBean implements MeatService {

    public PorkServiceBean(){
        System.out.println("猪肉类被初始化了");
    }
    @Override
    public String whatMeat() {
        return "猪肉";
    }

}

/spring_1700_容器后处理器/src/beans.xml

<?xml version="1.0" encoding="GBK"?>
    <!-- Spring配置文件的根元素，使用spring-beans-3.0.xsd语义约束 -->
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

    <bean id="meatServiceOfFish" class="com.b510.service.impl.FishServiceBean"></bean>
    <bean id="meatServiceOfPork" class="com.b510.service.impl.PorkServiceBean"></bean>
    <bean id="animaleServiceOfDog" class="com.b510.service.impl.DogServiceBean"
        p:age="12" p:meatService-ref="meatServiceOfPork" />
    <bean id="animaleServiceOfCat" class="com.b510.service.impl.CatServiceBean"
        p:age="3" p:meatService-ref="meatServiceOfFish" />
    <!-- 容器后处理器 -->
    <bean id="appBeanPostProcessor" class="com.b510.app.util.MyBeanFactoryPostProcessor"></bean>
</beans>

运行结果：

2012-3-12 20:28:20 org.springframework.context.support.AbstractApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@15eb0a9: display name [org.springframework.context.support.ClassPathXmlApplicationContext@15eb0a9]; startup date [Mon Mar 12 20:28:20 CST 2012]; root of context hierarchy
2012-3-12 20:28:20 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [beans.xml]
2012-3-12 20:28:24 org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory
信息: Bean factory for application context [org.springframework.context.support.ClassPathXmlApplicationContext@15eb0a9]: org.springframework.beans.factory.support.DefaultListableBeanFactory@4a63d8
比较一下上面信息********************
Spring容器是：org.springframework.beans.factory.support.DefaultListableBeanFactory@4a63d8: defining beans [meatServiceOfFish,meatServiceOfPork,animaleServiceOfDog,animaleServiceOfCat,appBeanPostProcessor]; root of factory hierarchy
比较一下下面信息********************
2012-3-12 20:28:24 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@4a63d8: defining beans [meatServiceOfFish,meatServiceOfPork,animaleServiceOfDog,animaleServiceOfCat,appBeanPostProcessor]; root of factory hierarchy
鱼肉类被初始化了
猪肉类被初始化了
狗类被初始化了
猫类被初始化了
我是狗，我的年龄是:12,我很喜欢吃猪肉
我是猫，我的年龄是:3,我很喜欢吃鱼肉

我们可以看见：“比较一下上面信息********************”和“比较一下上面信息********************”
的中间内容和系统输出的信息，连个是相同的。