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

本是古典何须时尚 2021-09-16 03:20 288阅读 0赞

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][PostConstruct _ _PreDestroy _ _bean]

第二种是：[通过 在xml中定义init-method 和  destory-method方法][_xml_init-method _ _destory-method]

第三种是：[ 通过bean实现InitializingBean和 DisposableBean接口][bean_InitializingBean_ DisposableBean]

# 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">
     
    
     
    
     
     
    
     
    <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

[PostConstruct _ _PreDestroy _ _bean]: http://write.blog.csdn.net/postedit/8681497
[_xml_init-method _ _destory-method]: http://blog.csdn.net/topwqp/article/details/8681467
[bean_InitializingBean_ DisposableBean]: http://blog.csdn.net/topwqp/article/details/8681573