spring bean的init 方法和 destory方法的三种实现方式

1.通过@Bean(initMethod ="initPerson",destroyMethod ="destroyPerson" )
public class Person {


    public Person() {
        System.out.println("Person 初始化............");
    }

    public void initPerson(){
        System.out.println("Person ..... init");
    }
    public void destroyPerson(){
        System.out.println("Person ..... destroy");
    }
}

2.@PostConstruct 和 @PreDestroy
public class Pig {
    public Pig() {
        System.out.println("Pig 被创建了.....");
    }

    @PostConstruct
    public void initPig(){
        System.out.println("Pig ..... init");
    }

    @PreDestroy
    public void destroyPig(){
        System.out.println("Pig ..... destroy");
    }

}
3.实现InitializingBean和DisposableBean 接口
public class Cat implements InitializingBean,DisposableBean{
    public Cat() {
        System.out.println("Cat .... 被初始化了");
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        System.out.println("cat ...init");
    }

    @Override
    public void destroy() throws Exception {
        System.out.println("cat ...destroy");
    }
}

@Import({Cat.class,Pig.class})
public class Configue {
    @Bean(initMethod ="initPerson",destroyMethod ="destroyPerson" )
    public Person person(){
        return new Person();
    }
}

public class App 
{
    public static void main( String[] args )
    {
        AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext(Configue.class);
        applicationContext.close();


    }
}

 理解这三种方式,对于源码学习有一定的帮助