Bean的初始化和销毁——Bean的生命周期

三个文件都有改动：

 

package test;

public class HelloWorld {
	private String message;

	public String getMessage() {
		return message;
	}

	public void setMessage(String message) {
		System.out.println("Your Message :"+message);
	}
	
	public void init() {
		System.out.println("bean开始进入");
	}
	
	public void destroy() {
		System.out.println("bean被销毁");
	}
	

}

　　

package test;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.core.io.ClassPathResource;

public class MainApp {
	public static void main(String[] args) {
		//注意这里是AbstractApplicationContext,只有这个类有registerShutdownHook()方法
		AbstractApplicationContext context = new ClassPathXmlApplicationContext("Beans.xml");
		
		HelloWorld obj = (HelloWorld) context.getBean("helloworld");
		
		obj.getMessage();
		context.registerShutdownHook();
		
		
	}

}

　　

<?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    
            http://www.springframework.org/schema/context     
            http://www.springframework.org/schema/context/spring-context.xsd    
            http://www.springframework.org/schema/mvc    
            http://www.springframework.org/schema/mvc/spring-mvc.xsd  
            http://www.springframework.org/schema/tx   
            http://www.springframework.org/schema/tx/spring-tx.xsd  
            http://www.springframework.org/schema/aop  
            http://www.springframework.org/schema/aop/spring-aop.xsd "  > 

   <bean id="helloworld" class="test.HelloWorld" 
       init-method = "init" 
       destroy-method = "destroy">
       <property name="message" value="你好世界"></property>
       
       
   </bean>

</beans>