深入理解Spring中bean的生命周期介绍

1.以ApplocationContext上下文单例模式装配bean为例，深入探讨bean的生命周期：

（1）.生命周期图：

（2）.具体事例：

person类实现BeanNameAware,BeanFactoryAware接口

public class Person implements BeanNameAware ,BeanFactoryAware{

private String name;

public Person(){
   System.out.println("调用构造器为属性值初始化");
 }

public String getName() {
   return name;
 }

public void setName(String name) {
   this.name = name;
 }

@Override
 public void setBeanName(String arg0) {
   // TODO Auto-generated method stub
   System.out.println("获取beanName id值"+" "+arg0);

}

@Override
 public void setBeanFactory(BeanFactory arg0) throws BeansException {
   // TODO Auto-generated method stub
   System.out.println("获取BeanFactory" +" "+arg0);

}
}

public class MyBeanPostProcessor implements BeanPostProcessor{

@Override
 public Object postProcessAfterInitialization(Object arg0, String arg1) throws BeansException {
   // TODO Auto-generated method stub
   System.out.println("调用postProcessAfterInitialization");
   return arg0;
 }

@Override
 public Object postProcessBeforeInitialization(Object arg0, String arg1) throws BeansException {
   // TODO Auto-generated method stub
   System.out.println("调用postProcessBeforeInitialization");
   return arg0;
 }

}

ApplicationContext.xml配置文件:

<?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的配置文件 -->
<bean id="person" class="org.jingdong.bean.life.Person">
<property name="name" value="grl"></property>
</bean>

<bean id="myBeanPostProcessor" class="org.jingdong.bean.life.MyBeanPostProcessor"></bean>
</beans>

Main.java

public class Main {
 public static void main(String[] args) {
   // 创建IOC容器
   ApplicationContext ac = new ClassPathXmlApplicationContext("org/jingdong/bean/life/applicationContext.xml");
   //从容器中获取bean实例
   Person person = (Person) ac.getBean("person");
   //使用bean
   System.out.println(person.getName());
 }
}

2.以Spring Factory装配bean为例：

（1）.生命周期图：

来源：http://www.cnblogs.com/grl214/p/6623575.html