Spring中Bean的十步生命周期详解-----Spring框架

本是古典何须时尚 2024-03-23 21:22 60阅读 0赞

>     <?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 id="user" class="com.powernode.spring6.bean.User" init-method="initUser" destroy-method="destroyUser">
>             <property name="name" value="Jack"/>
>         </bean>
>         <bean class="com.powernode.spring6.bean.LogBeanPostProcessor"/>
>     </beans>
> 
>     <?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 id="user" class="com.powernode.spring6.bean.User" init-method="initUser" destroy-method="destroyUser">
>             <property name="name" value="Jack"/>
>         </bean>
>         <bean class="com.powernode.spring6.bean.LogBeanPostProcessor"/>
>     </beans>

>     package com.powernode.spring6.bean;
>     
>     import org.slf4j.Logger;
>     import org.slf4j.LoggerFactory;
>     import org.springframework.beans.BeansException;
>     import org.springframework.beans.factory.*;
>     
>     public class User implements BeanNameAware, BeanClassLoaderAware, BeanFactoryAware, InitializingBean,DisposableBean
>     {
>         private static final Logger logger = LoggerFactory.getLogger(User.class);
>         private String name;
>         public User()
>         {
>             logger.info("空参构造器实例化");
>         }
>     
>         public void setName(String name)
>         {
>             logger.info("赋值");
>             this.name = name;
>         }
>         public void initUser()
>         {
>             logger.info("初始化");
>         }
>         public void destroyUser()
>         {
>             logger.info("销毁");
>         }
>     
>         @Override
>         public void setBeanClassLoader(ClassLoader classLoader)
>         {
>             //ClassLoader的方法
>             logger.info("bean的类加载器是" + classLoader);
>         }
>     
>         @Override
>         public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
>             logger.info("bean的工厂是" + beanFactory);
>         }
>     
>         @Override
>         public void setBeanName(String name) {
>             //在这里使用Bean的名字
>             logger.info("bean的名字是" + name);
>         }
>     
>         @Override
>         public void afterPropertiesSet() throws Exception {
>             logger.info("initializingBean的afterPropertiesSet方法执行");
>         }
>     
>         @Override
>         public void destroy() throws Exception {
>             logger.info("DisposableBean的destroy方法执行");
>         }
>     }
> 
>     package com.powernode.spring6.bean;
>     
>     import org.slf4j.Logger;
>     import org.slf4j.LoggerFactory;
>     import org.springframework.beans.BeansException;
>     import org.springframework.beans.factory.*;
>     
>     public class User implements BeanNameAware, BeanClassLoaderAware, BeanFactoryAware, InitializingBean,DisposableBean
>     {
>         private static final Logger logger = LoggerFactory.getLogger(User.class);
>         private String name;
>         public User()
>         {
>             logger.info("空参构造器实例化");
>         }
>     
>         public void setName(String name)
>         {
>             logger.info("赋值");
>             this.name = name;
>         }
>         public void initUser()
>         {
>             logger.info("初始化");
>         }
>         public void destroyUser()
>         {
>             logger.info("销毁");
>         }
>     
>         @Override
>         public void setBeanClassLoader(ClassLoader classLoader)
>         {
>             //ClassLoader的方法
>             logger.info("bean的类加载器是" + classLoader);
>         }
>     
>         @Override
>         public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
>             logger.info("bean的工厂是" + beanFactory);
>         }
>     
>         @Override
>         public void setBeanName(String name) {
>             //在这里使用Bean的名字
>             logger.info("bean的名字是" + name);
>         }
>     
>         @Override
>         public void afterPropertiesSet() throws Exception {
>             logger.info("initializingBean的afterPropertiesSet方法执行");
>         }
>     
>         @Override
>         public void destroy() throws Exception {
>             logger.info("DisposableBean的destroy方法执行");
>         }
>     }

>     package com.powernode.spring6.test;
>     
>     import com.powernode.spring6.bean.User;
>     import org.springframework.context.ApplicationContext;
>     import org.springframework.context.support.ClassPathXmlApplicationContext;
>     
>     public class Test
>     {
>         @org.junit.Test
>         public void TestBeanInitiation()
>         {
>             ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
>             User user = applicationContext.getBean("user",User.class);
>             System.out.println(user);
>             ClassPathXmlApplicationContext classPathXmlApplicationContext = (ClassPathXmlApplicationContext) applicationContext;
>             classPathXmlApplicationContext.close();
>         }
>     }
> 
>     package com.powernode.spring6.test;
>     
>     import com.powernode.spring6.bean.User;
>     import org.springframework.context.ApplicationContext;
>     import org.springframework.context.support.ClassPathXmlApplicationContext;
>     
>     public class Test
>     {
>         @org.junit.Test
>         public void TestBeanInitiation()
>         {
>             ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
>             User user = applicationContext.getBean("user",User.class);
>             System.out.println(user);
>             ClassPathXmlApplicationContext classPathXmlApplicationContext = (ClassPathXmlApplicationContext) applicationContext;
>             classPathXmlApplicationContext.close();
>         }
>     }