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

原文地址：http://blog.youkuaiyun.com/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>