bean 的生命周期分为：一个是ApplicationContext的容器的bean的生命周期，另一个是BeanFactory容器的生命周期。
首先介绍一下：ApplicationContext的容器的bean的生命周期：
一共13步步骤如下：
Instaniate--->Populate properties--->BeanNameAware's setBeanName--->BeanFactoryAware's setBeanFactory-->ApplicationContextAware's setApplicationContext-->pre-Initialization BeanPostProcessor --->InitializingBean's afterPropertiesSet--->call custom init-method-->post-Initialization BeanPostProcessor-->bean is ready to use-->container is shutdown-->DisposableBean's destory-->call custom destory-method.
上述文字的图如下所示：
其次介绍一下：BeanFactory的bean的生命周期，它的生命周期只是比ApplicationContext的bean的生命周期少了三步：一步是：ApplicationContextAware,另外两步是：
BeanPostProcessor的两步。如下图所示：
代码的目录结构如下：
beans.xml的代码如下：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="studentService" class="com.qls.beanlife2.StudentService" >
<property name="name" value="熊二"/>
</bean>
<bean id="myBeanPostProcessor" class="com.qls.beanlife2.MyBeanPostProcessor"/>
</beans>
StudentService的代码如下：
package com.qls.beanlife2; import org.springframework.beans.BeansException;
import org.springframework.beans.factory.*;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware; /**
* Created by ${秦林森} on 2017/6/6.
*/
public class StudentService implements BeanNameAware ,BeanFactoryAware,ApplicationContextAware,InitializingBean,DisposableBean{
private String name; public String getName() {
return name;
} public void setName(String name) {
this.name = name;
System.out.println("2.Populate Properties");
} public StudentService() {
System.out.println("1.Instantiate");
} @Override
public void setBeanName(String name) {
System.out.println("3.BeanNameAware's setBeanName the bean name is :"+name);
} @Override
public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
System.out.println("4.BeanFactoryAware's setBeanFactory the bean factory name is: "+beanFactory);
}
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException{
System.out.println("5.ApplicationContextAware's setApplicationContext the applicationContext is: "+applicationContext);
} @Override
public void afterPropertiesSet() throws Exception {
System.out.println("7.InitializingBean's afterPropertiesSet ");
}
public void hello(){
System.out.println("hello");
} @Override
public void destroy() throws Exception {
System.out.println("destroy");
}
public void myDestroy(){
System.out.println("my destroy");
}
}
MyBeanPostProcessor的代码如下：
package com.qls.beanlife2; import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor; /**
* Created by ${秦林森} on 2017/6/6.
*/
public class MyBeanPostProcessor implements BeanPostProcessor {
@Override
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
System.out.println("6.pre-initialization BeanPostProcessor");
return beanName;
} @Override
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
return beanName;
}
}
StudentTest的代码如下：
package com.qls.beanlife2; import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.core.io.ClassPathResource; /**
* Created by ${秦林森} on 2017/6/6.
*/
public class StudentTest {
public static void main(String[] args) {
ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext("com/qls/beanlife2/beans.xml");//这个是测试ApplicationContext的bean的生命周期
/*
、//这个是测试BeanFactory的bean的生命周期。
XmlBeanFactory factory = new XmlBeanFactory(new ClassPathResource("com/qls/beanlife2/beans.xml"));
StudentService studentService= (StudentService) factory.getBean("studentService");
studentService.hello();*/
}
}