从头开始学习spring(一)
传统编程中，依赖关系比较多的情况下，导致维护成本直线上升，spring 采用Ioc对bean进行管理，减少了开发人员的工作量
正确理解spring bean 的生命周期非常重要
package com.study.spring.beans; import org.springframework.beans.BeansException; import org.springframework.beans.factory.BeanFactory; import org.springframework.beans.factory.BeanFactoryAware; import org.springframework.beans.factory.BeanNameAware; import org.springframework.beans.factory.DisposableBean; import org.springframework.beans.factory.InitializingBean; import org.springframework.beans.factory.config.BeanPostProcessor; import org.springframework.context.ApplicationContext; import org.springframework.context.ApplicationContextAware; public class MyBeanLifeCycle implements BeanNameAware, BeanFactoryAware, ApplicationContextAware, BeanPostProcessor, InitializingBean, DisposableBean { @Override public void setBeanName(String s) { System.out.println("bean id : " + s); } @Override public void destroy() throws Exception { System.out.println("destroy"); } @Override public void setBeanFactory(BeanFactory beanFactory) throws BeansException { System.out.println("beanFactory : " + beanFactory.toString()); } @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { System.out.println("applicationContext : " + applicationContext.getApplicationName()); } @Override public Object postProcessBeforeInitialization(Object o, String s) throws BeansException { System.out.println("postProcessBeforeInitialization : " + s); return o; } @Override public Object postProcessAfterInitialization(Object o, String s) throws BeansException { System.out.println("postProcessAfterInitialization : " + s); return o; } @Override public void afterPropertiesSet() throws Exception { System.out.println("afterPropertiesSet"); } }
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <bean class="com.study.spring.service.impl.HelloServiceImpl" id="helloService"/> <bean id="myBean" class="com.study.spring.beans.MyBeanLifeCycle"/> </beans>
原文：http://www.cnblogs.com/liuzyw/p/7594651.html