• Spring生命周期各种接口使用


    1,BeanPostProcessor接口;
    不能在POJO上面使用,需要单独找一个类进行使用;
    如果在POJO上面实现了此接口,在实现了其他*Aware
    接口之后,这个接口方法将不会被调用;
    2, POJO实现了BeanNameAware接口;
    可以与BeanPostProcessor同时使用;
    3, POJO实现了BeanFactoryAware接口;
    可以与BeanPostProcessor同时使用;
    4, POJO实现了ApplicationContextAware接口;
    可以与BeanPostProcessor同时使用;
    5,POJO实现了DisposableBean接口;
    可以正常调用接口的dispose()方法;
    6,在bean声明部分定义的init-method
    和destroy-method方法可以正常调用;
    7,如果显示调用dispose()、destroy-method方法,
    需要使用
    AbstractApplicationContext context =
    new ClassPathXmlApplicationContext("appbeans.xml");
    //...
    context.registerShutdownHook();

    8,InitializingBean.afterPropertiesSet()方法在init-method()之前调用;

    DisposableBean.dispose()方法在destroy-method()之前调用;

     声明周期图:

    http://my.oschina.net/u/218421/blog/37743

    package com.stono.sprtest;
    
    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.context.ApplicationContext;
    import org.springframework.context.ApplicationContextAware;
    import org.springframework.context.support.AbstractApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class Minstrel implements BeanNameAware, BeanFactoryAware,
            ApplicationContextAware, InitializingBean, DisposableBean {
    
        public static void main(String[] args) {
            AbstractApplicationContext context = new ClassPathXmlApplicationContext(
                    "appbeans.xml");
            Minstrel minstrel = (Minstrel) context.getBean("minstrel");
            minstrel.show();
            context.registerShutdownHook();
        }
    
        private String accordion;
        private Logger logger = Logger.getLogger(Minstrel.class);
    
        private String song;
    
        public Minstrel() {
            logger.info("default constructor");
        }
    
        public Minstrel(String song) {
            logger.info("song constructor");
            this.song = song;
        }
    
        public Minstrel(String song, String accordion) {
            logger.info("song accordion constructor");
            this.song = song;
            this.accordion = accordion;
        }
    
        public void destroyMethod() {
            logger.info("destroyMethod called");
        }
    
        public String getAccordion() {
            logger.info("getAccordion method");
            return accordion;
        }
    
        public String getSong() {
            logger.info("getSong method");
            return song;
        }
    
        public void initMethod() {
            logger.info("initMethod called");
        }
    
        public void setAccordion(String accordion) {
            logger.info("setAccordion method");
            this.accordion = accordion;
        }
    
        public void setSong(String song) {
            logger.info("setSong method");
            this.song = song;
        }
    
        public void show() {
            System.out.println("show method called");
        }
    
        @Override
        public void setBeanName(String name) {
            logger.info("com.stono.sprtest.Minstrel.setBeanName(String):" + name);
        }
    
        @Override
        public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
            logger.info("com.stono.sprtest.Minstrel.setBeanFactory(BeanFactory):"
                    + beanFactory);
        }
    
        @Override
        public void setApplicationContext(ApplicationContext applicationContext)
                throws BeansException {
            logger.info("com.stono.sprtest.Minstrel.setApplicationContext(ApplicationContext):"
                    + applicationContext);
        }
    
        @Override
        public void afterPropertiesSet() throws Exception {
            logger.info("com.stono.sprtest.Minstrel.afterPropertiesSet()");
        }
    
        @Override
        public void destroy() throws Exception {
            logger.info("com.stono.sprtest.Minstrel.destroy()");
        }
    
    }
    package com.stono.sprtest;
    
    import org.springframework.beans.BeansException;
    import org.springframework.beans.factory.config.BeanPostProcessor;
    
    public class AppBeanPostProcessor implements BeanPostProcessor {
    
        @Override
        public Object postProcessBeforeInitialization(Object bean, String beanName)
                throws BeansException {
            System.out.println("postProcessBeforeInitialization is called");
            return bean;
        }
    
        @Override
        public Object postProcessAfterInitialization(Object bean, String beanName)
                throws BeansException {
            System.out.println("postProcessAfterInitialization is called");
            return bean;
        }
    
    }
    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
        <bean id="minstrel" class="com.stono.sprtest.Minstrel"
            init-method="initMethod" destroy-method="destroyMethod">
            <constructor-arg name="song" value="SongSong"></constructor-arg>
            <property name="accordion">
                <value>oldAccordion</value>
            </property>
        </bean>
        <bean class="com.stono.sprtest.AppBeanPostProcessor"></bean>
    </beans>

     程序输出:

    2015-9-18 7:55:26 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
    信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@89fbe3: startup date [Fri Sep 18 07:55:26 CST 2015]; root of context hierarchy
    2015-9-18 7:55:26 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
    信息: Loading XML bean definitions from class path resource [appbeans.xml]
    song constructor
    setAccordion method
    com.stono.sprtest.Minstrel.setBeanName(String):minstrel
    com.stono.sprtest.Minstrel.setBeanFactory(BeanFactory):org.springframework.beans.factory.support.DefaultListableBeanFactory@cbf30e: defining beans [minstrel,com.stono.sprtest.AppBeanPostProcessor#0]; root of factory hierarchy
    com.stono.sprtest.Minstrel.setApplicationContext(ApplicationContext):org.springframework.context.support.ClassPathXmlApplicationContext@89fbe3: startup date [Fri Sep 18 07:55:26 CST 2015]; root of context hierarchy
    postProcessBeforeInitialization is called
    com.stono.sprtest.Minstrel.afterPropertiesSet()
    initMethod called
    postProcessAfterInitialization is called
    show method called
    2015-9-18 7:55:26 org.springframework.context.support.ClassPathXmlApplicationContext doClose
    信息: Closing org.springframework.context.support.ClassPathXmlApplicationContext@89fbe3: startup date [Fri Sep 18 07:55:26 CST 2015]; root of context hierarchy
    com.stono.sprtest.Minstrel.destroy()
    destroyMethod called
  • 相关阅读:
    idea常用快捷键及操作
    Ubuntu 装nexus
    ubuntu安装gitlab
    ubuntu安装jdk,maven,tomcat
    ubuntu安装gitlab-ci-runner、注册
    ubuntu开启远程shell,开启上传下载
    Ubuntu安装软件提示boot空间不足
    POJ3461 KMP简单变形输出模式串在主串出现的次数
    涨姿势stl map['a']['a']=b;
    对链表的操作(数据结构线性表算法设计练习)
  • 原文地址:https://www.cnblogs.com/stono/p/4817076.html
Copyright © 2020-2023  润新知