Spring - Bean管理之配置（@PostConstruct、@PreDestroy、@Scope）

packagecom.imooc.demo2;
importorg.springframework.stereotype.Component;
importjavax.annotation.PostConstruct;
importjavax.annotation.PreDestroy;
@Component("bean1")
publicclassBean1 {
@PostConstructpublicvoidinit(){
System.out.println("initBean...");
    }
publicvoidsay(){
System.out.println("say...");
    }
@PreDestroypublicvoiddestory(){
System.out.println("destoryBean...");
    }
}

<context:component-scanbase-package="com.imooc"/>

packagecom.imooc.demo2;
importorg.junit.Test;
importorg.springframework.context.ApplicationContext;
importorg.springframework.context.support.ClassPathXmlApplicationContext;
publicclassSpringDemo2 {
@Testpublicvoiddemo1(){
ClassPathXmlApplicationContextapplicationContext=newClassPathXmlApplicationContext("applicationContext.xml");
Bean1bean1= (Bean1)applicationContext.getBean("bean1");
bean1.say();
applicationContext.close();
    }
}

运行结果：initBean...
say...
destoryBean...

packagecom.imooc.demo2;
importorg.springframework.context.annotation.Scope;
importorg.springframework.stereotype.Component;
@Component("bean2")
@Scope("prototype")
publicclassBean2 {
}

<context:component-scanbase-package="com.imooc"/>

packagecom.imooc.demo2;
importorg.junit.Test;
importorg.springframework.context.ApplicationContext;
importorg.springframework.context.support.ClassPathXmlApplicationContext;
publicclassSpringDemo2 {
@Testpublicvoiddemo2(){
ClassPathXmlApplicationContextapplicationContext=newClassPathXmlApplicationContext("applicationContext.xml");
Bean2bean1= (Bean2)applicationContext.getBean("bean2");
Bean2bean2= (Bean2)applicationContext.getBean("bean2");
System.out.println(bean1==bean2);
    }
}

运行结果（Ps：默认为单例，所以true）：false