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:

[code]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:

[code]<?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:

[code]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:

[code]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.