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解决方案一：通过XML配置文件实现：(标签bean的属性init-method和destroy-method)

beans.xml:

 

SimpleBean.java:

 

 

package org.spring.tutorial;public class SimpleBean {	public SimpleBean() {		System.out.println("SimpleBean called");	}		public void init() {		System.out.println("init called");	}		public void destroy() {		System.out.println("destroy called");	}	}

 

MainApp.java:

 

package org.spring.tutorial;import org.springframework.context.support.AbstractApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class MainApp {	public static void main(String[] args) {		AbstractApplicationContext context 		= new ClassPathXmlApplicationContext("beans.xml"); // 加载指定XML文件的定义		context.registerShutdownHook();	// 注册关闭钩子	}}

运行之：

 

 

SimpleBean calledinit called五月 19, 2013 5:59:18 下午 org.springframework.context.support.AbstractApplicationContext doCloseINFO: Closing org.springframework.context.support.ClassPathXmlApplicationContext@1286c71: startup date [Sun May 19 17:59:18 CST 2013]; root of context hierarchydestroy called

解决方案二：实现Spring的InitializingBean和DisposableBean。

 

SimpleBean.java:

 

package org.spring.tutorial;import org.springframework.beans.factory.DisposableBean;import org.springframework.beans.factory.InitializingBean;public class SimpleBean implements InitializingBean,DisposableBean {	public SimpleBean() {		System.out.println("SimpleBean called");	}	@Override	public void destroy() throws Exception {		System.out.println("destroy called");	}	@Override	public void afterPropertiesSet() throws Exception {		System.out.println("afterPropertiesSet called");	}		}

beans.xml:

 

 

运行结果：

 

 

SimpleBean calledafterPropertiesSet called五月 19, 2013 6:03:44 下午 org.springframework.context.support.AbstractApplicationContext doCloseINFO: Closing org.springframework.context.support.ClassPathXmlApplicationContext@e77ca4: startup date [Sun May 19 18:03:44 CST 2013]; root of context hierarchydestroy called

解决方案三：利用javax.annotation包的注解PostConstruct和PreDestroy。

 

SimpleBean.java:

 

package org.spring.tutorial;import javax.annotation.PostConstruct;import javax.annotation.PreDestroy;public class SimpleBean {	public SimpleBean() {		System.out.println("SimpleBean called");	}	@PreDestroy	public void destroy() throws Exception {		System.out.println("destroy called");	}	@PostConstruct	public void afterPropertiesSet() throws Exception {		System.out.println("afterPropertiesSet called");	}		}

beans.xml:

 

 

运行结果：

 

 

SimpleBean called五月 19, 2013 6:06:39 下午 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletonsINFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@431425: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,bean,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchyafterPropertiesSet calleddestroy called

总结：可以利用接口(InitializingBean,DisposableBean)，注解(@PreDestroy,@PostConstruct)和XML配置文件(bean的属性init-method,destroy-method)来实现bean的生命周期。可以根据个人的喜好选择不同的方案。

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