Spring源码分析-IOC之DisposableBean

上一篇我们讲到了InitializingBean,这一篇我们看下DisposableBean接口，它也只提供一个方法destroy()。如果实现了DisposebleBean接口，那么Spring将自动调用bean中的Destory方法进行销毁,下面我们看下DisposebleBean应用:

package com.ck.bean;


import java.io.Serializable;

import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;

public class Person implements InitializingBean, DisposableBean, Serializable{
	
	private static final long serialVersionUID = 1L;

	private Long id;
	
	private String name;
	
	private String sex;
	
	private Integer age;
	
	
	public Person() {
	}

	public Long getId() {
		return id;
	}

	public void setId(Long id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}


	public String getSex() {
		return sex;
	}


	public void setSex(String sex) {
		this.sex = sex;
	}

	public Integer getAge() {
		return age;
	}

	public void setAge(Integer age) {
		this.age = age;
	}

	@Override
	public void afterPropertiesSet() throws Exception {
		System.out.println("Person InitializingBean afterPropertiesSet");
		
	}
    //注意这个方法
	@Override
	public void destroy() throws Exception {
		System.out.println("Person DisposableBean destroy");
		
	}
	
}

看下配置文件:

<?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:aop="http://www.springframework.org/schema/aop"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
		http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">

	<bean id="person" class="com.ck.bean.Person"/>
</beans>

看下测试代码:

package com.ck.ioc;


import org.junit.Test;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

public class IocTest {
	@Test
	public void test() {
		ConfigurableApplicationContext ctx = new FileSystemXmlApplicationContext( "src/main/resources/applicationContext.xml");
		//注意这个方法
        ctx.close();
	}

}

测试结果:

四月 03, 2019 8:19:03 下午 org.springframework.context.support.FileSystemXmlApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.FileSystemXmlApplicationContext@3c679bde: startup date [Wed Apr 03 20:19:03 CST 2019]; root of context hierarchy
四月 03, 2019 8:19:03 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from file [X:\CK\stsws\springWeb\src\main\resources\applicationContext.xml]
Person InitializingBean afterPropertiesSet
四月 03, 2019 8:19:04 下午 org.springframework.context.support.FileSystemXmlApplicationContext doClose
信息: Closing org.springframework.context.support.FileSystemXmlApplicationContext@3c679bde: startup date [Wed Apr 03 20:19:03 CST 2019]; root of context hierarchy
Person DisposableBean destroy

我们看到destroy方法被执行.

小结:DisposableBean主要用于我们销毁bean的时候做一些逻辑处理.