Spring init-method与destroy-method属性的用法解析

public class Speaker { 
	private String name;
	private String topic;	
	private Speaker(String name,String topic){
		this.name = name;
		this.topic = topic;
	}
	
	/**
	 * Speaker实例化时执行的方法
	 */
	private void init() {
		System.out.println("执行Speaker 的 初始化方法 init");
	}
 
	/**
	 * Speaker销毁时执行的方法
	 */
	private void destroy() {
		System.out.println("执行Speaker 的销毁方法 destroy");
	}
	
	public void teach() {		
		System.out.println(toString());
	}
	
	@Override
	public String toString() {
		return "Speaker [name=" + name + ", topic=" + topic + "]";
	}
}

<?xml version="1.0" encoding="UTF-8"?>
<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.xsd">
 
 <!-- Learn 05 init-method和destroy-method属性的使用 -->
 <bean id="speaker05" class="com.mahaochen.spring.learn05.Speaker"
  init-method="init" destroy-method="destroy">
  <constructor-arg index="0" value="elle" />
  <constructor-arg index="1" value="Study Hard!" />
 </bean>
</beans>

<!-- Learn 04  使用实例工厂方式实例化Bean -->
 <import resource="com/mahaochen/spring/learn05/beanLearn05.xml"/>

public class TestSpring05 { 
 public static void main(String[] args) {  
  ApplicationContext appContext = new ClassPathXmlApplicationContext("beans.xml");
  Speaker speaker05 = (Speaker) appContext.getBean("speaker05");
  speaker05.teach();
  ((ClassPathXmlApplicationContext) appContext).close();
 }
}

<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">