Spring bean通过实现InitializingBean ,DisposableBean接口实现初始化方法和销毁前操作

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原文地址：http://blog.csdn.net/topwqp/article/details/8681573

关于在spring容器初始化bean和销毁前所做的操作定义方式有三种：

第一种是：通过@PostConstruct和@PreDestroy方法实现初始化和销毁bean之前进行的操作。

第二种是：通过在xml中定义init-method和destory-method方法。

第三种是：通过bean实现InitializingBean和DisposableBean接口。

1：定义相应类实现InitializingBean ,DisposableBean 接口

<span style="font-weight: normal;">package com.myapp.core.annotation.init;    import javax.annotation.PostConstruct;  import javax.annotation.PreDestroy;    import org.springframework.beans.factory.DisposableBean;  import org.springframework.beans.factory.InitializingBean;    public class PersonService  implements InitializingBean,DisposableBean{          private String  message;        public String getMessage() {          return message;      }        public void setMessage(String message) {          this.message = message;      }        @Override      public void destroy() throws Exception {          // TODO Auto-generated method stub          System.out.println("I'm  init  method  using implements InitializingBean interface...."+message);                }        @Override      public void afterPropertiesSet() throws Exception {          // TODO Auto-generated method stub          System.out.println("I'm  init  method  using implements DisposableBean interface...."+message);                }          }  </span>

2：定义相应的配置文件:

<span style="font-weight: normal;"><?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:context="http://www.springframework.org/schema/context"  xsi:schemaLocation="http://www.springframework.org/schema/beans  http://www.springframework.org/schema/beans/spring-beans-3.1.xsd  http://www.springframework.org/schema/context  http://www.springframework.org/schema/context/spring-context-3.1.xsd">    <!-- <context:component-scan  base-package="com.myapp.core.jsr330"/> -->    <!-- <context:annotation-config /> -->      <!-- <bean class="org.springframework.context.annotation.CommonAnnotationBeanPostProcessor" />  <bean id="personService" class="com.myapp.core.annotation.init.PersonService">            <property name="message" value="123"></property>  </bean>   -->    <bean id="personService" class="com.myapp.core.annotation.init.PersonService">            <property name="message" value="123"></property>  </bean>    </beans>  </span>

3：测试类：

<span style="font-weight: normal;">package com.myapp.core.annotation.init;    import org.springframework.context.ApplicationContext;  import org.springframework.context.support.AbstractApplicationContext;  import org.springframework.context.support.ClassPathXmlApplicationContext;    public class MainTest {            public static void main(String[] args) {                    AbstractApplicationContext  context = new ClassPathXmlApplicationContext("resource/annotation.xml");                 PersonService   personService  =  (PersonService)context.getBean("personService");                 context.registerShutdownHook();      }    }  </span>

4：输出测试结果：

<span style="font-weight: normal;">I'm  init  method  using implements DisposableBean interface....123  三月 16, 2013 5:06:34 下午 org.springframework.context.support.AbstractApplicationContext doClose  INFO: Closing org.springframework.context.support.ClassPathXmlApplicationContext@205756: startup date [Sat Mar 16 17:06:30 CST 2013]; root of context hierarchy  I'm  init  method  using implements InitializingBean interface....123  </span>

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