spring中Bean的生命周期总结 (四)

package www.csdn.spring.dao;

import org.springframework.beans.BeansException;

import org.springframework.beans.factory.config.BeanPostProcessor;

public class BeanPostProcessorImpl implements BeanPostProcessor {

@Override

public Object postProcessBeforeInitialization(Object bean, String beanName)

throws BeansException {

System.out.println("我把:" + beanName + "实例化化之前的操作");

return bean;

}

@Override

public Object postProcessAfterInitialization(Object bean, String beanName)

throws BeansException {

System.out.println("我把:" + beanName + "实例化化之后的操作");

return bean;

}

}

在配置文件中配置实体Bean和BeanPostProcessorImpl 特殊的Bean

[html]
< xml version="1.0" encoding="UTF-8" >

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">





www.csdn.spring.dao.HelloDaoImpl"

scope="singleton" lazy-init="false" init-method="init" destroy-method="close">










www.csdn.spring.dao.BeanPostProcessorImpl" />



[html]
< xml version="1.0" encoding="UTF-8" >

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">





www.csdn.spring.dao.HelloDaoImpl"

scope="singleton" lazy-init="false" init-method="init" destroy-method="close">










www.csdn.spring.dao.BeanPostProcessorImpl" />

< xml version="1.0" encoding="UTF-8" >

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">

www.csdn.spring.dao.HelloDaoImpl"

scope="singleton" lazy-init="false" init-method="init" destroy-method="close">

www.csdn.spring.dao.BeanPostProcessorImpl" />

创建测试类BeanTest

[java]
package www.csdn.spring.bean.cycle;


import org.junit.Test;

import org.springframework.context.ApplicationContext;

import org.springframework.context.ConfigurableApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;


public class BeanTest {


@Test

public void test() {

ApplicationContext context = new ClassPathXmlApplicationContext(

"classpath:spring-dao.xml");

// 强制造型

ConfigurableApplicationContext cont = (ConfigurableApplicationContext) context;

// 执行关闭 可以考到 destory-method的方法的执行

cont.close();


}

}
[java]
package www.csdn.spring.bean.cycle;


import org.junit.Test;

import org.springframework.context.ApplicationContext;

import org.springframework.context.ConfigurableApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;


public class BeanTest {


@Test

pub