深入理解Spring中bean的生命周期介绍
发布时间:2020-12-14 19:55:07 所属栏目:Java 来源:网络整理
导读: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 nam
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: 以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持编程小技巧。 您可能感兴趣的文章:
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