[Spring中bean的生命周期]
bean的生命周期
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：