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.