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

转自：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：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

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);

    }


}

2：定义相应的配置文件:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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>

3：测试类：

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();
    }

}

4：输出测试结果：

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