1. 对于bean实现 initializingbean，它将运行 afterpropertiesset()在所有的 bean 属性被设置之后。
2. 对于 bean 实现了disposablebean，它将运行 destroy()在 spring 容器释放该 bean 之后。

示例

package com.h3.customer.services;

import org.springframework.beans.factory.disposablebean;
import org.springframework.beans.factory.initializingbean;

public class customerservice implements initializingbean, disposablebean
{
	string message;
	
	public string getmessage() {
	  return message;
	}

	public void setmessage(string message) {
	  this.message = message;
	}
	
	public void afterpropertiesset() throws exception {
	  system.out.println("init method after properties are set : " + message);
	}
	
	public void destroy() throws exception {
	  system.out.println("spring container is destroy! customer clean up");
	}
	
}

file : applicationcontext.xml

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
	xsi:schemalocation="http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

       <bean id="customerservice" class="com.h3.customer.services.customerservice">
		<property name="message" value="i'm property message" />
       </bean>
		
</beans>

执行它

package com.h3.common;

import org.springframework.context.configurableapplicationcontext;
import org.springframework.context.support.classpathxmlapplicationcontext;

import com.h3.customer.services.customerservice;

public class app 
{
    public static void main( string[] args )
    {
    	configurableapplicationcontext context = 
			new classpathxmlapplicationcontext(new string[] {"applicationcontext.xml"});
	
    	customerservice cust = (customerservice)context.getbean("customerservice");
    	
    	system.out.println(cust);
    	
    	context.close();
    }
}

输出结果

init method after properties are set : i'm property message 
com.h3.customer.services.customerservice@4090c06f 
spring container is destroy! customer clean up