有关Spirng ioc的BeanPostProcessor接口案例

package com.sise.lh.lab01;
/**
 * 作者：idea
 * 时间：2017/9/14
 * 使用说明：学生bean
 */
public class Student {
    private int age;
    private String name;
    public void init(){
        this.age=18;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}
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package com.sise.lh.lab01;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
/**
 * 作者：idea
 * 时间：2017/9/28
 * 使用说明：只要有一个bean实现了这个接口，就一定会将所有的bean都做一次拦截
 */
public class StudentCheck implements BeanPostProcessor {
    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        if(beanName.equals("student")) {
            Student student= (Student) bean;
            student.setAge(18);
            student.setName("idea");
            System.out.println("this is postProcessBeforeInitialization");
        }
        return bean;
    }
    @Override
    public Object postProcessAfterInitialization(Object bean, String s) throws BeansException {
        System.out.println("this is postProcessAfterInitialization");
        return bean;
    }
}
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<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <bean id="student" class="com.sise.lh.lab01.Student"></bean>
    <bean id="studentCheck" class="com.sise.lh.lab01.StudentCheck"></bean>
</beans>
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package com.sise.lh.lab01;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
 * 作者：idea
 * 时间：2017/9/28
 * 使用说明：案例测试
 */
public class DemoTest {
    public static void main(String[] args) {
        ApplicationContext applicationContext=new ClassPathXmlApplicationContext("lab01/spring-config01.xml");
        Student student= (Student) applicationContext.getBean("student");
        System.out.println(student.getAge());
        System.out.println(student.getName());
    }
}
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this is postProcessBeforeInitialization
this is postProcessAfterInitialization
18
idea
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