在xml中配置 init-method和 destory-method方法

只是定义spring 容器在初始化bean 和容器销毁之前的所做的操作

基于xml的配置只是一种方式：

  
   <bean id="personService" class="com.myapp.core.beanscope.PersonService" scope="singleton"  init-method="init"  destroy-method="cleanUp">
   
   </bean>

package com.myapp.core.beanscope;


public class PersonService  {
   private String  message;

	public String getMessage() {
		return message;
	}
	
	public void setMessage(String message) {
		this.message = message;
	}
   

	
	public void init(){
		System.out.println("init");
	}
	//  how  validate the  destory method is  a question
	public void  cleanUp(){
		System.out.println("cleanUp");
	}
}

package com.myapp.core.beanscope;

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("SpringBeans.xml");
	
	PersonService  person = (PersonService)context.getBean("personService");
	
	person.setMessage("hello  spring");
	
	PersonService  person_new = (PersonService)context.getBean("personService");
	
	System.out.println(person.getMessage());
	System.out.println(person_new.getMessage());
	context.registerShutdownHook();

	
}
} 

init
hello  spring
hello  spring
cleanUp

可以看出 init 方法和 clean up方法都已经执行了。