对Spring Bean 生命周期方法的总结

@Bean(initMethod = "initMethod", destroyMethod = "destroyMethod")
public BeanTest beanTest() {
    return new BeanTest();
}

public class BeanTest implements InitializingBean, DisposableBean, BeanPostProcessor, ApplicationContextAware {
    public BeanTest() {
        System.out.println("1.constructor");
    }

    @PostConstruct
    public void postConstruct() {
        System.out.println("2.PostConstruct");
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        System.out.println("3.InitializingBean:afterPropertiesSet");
    }


    public void initMethod() {
        System.out.println("4.initMethod");
    }

    @PreDestroy
    public void annDestroy() {
        System.out.println("1.PreDestroy");
    }

    @Override
    public void destroy() throws Exception {
        System.out.println("2.DisposableBean:destroy");
    }


    public void destroyMethod() {
        System.out.println("3.destroyMethod");
    }

    /*@Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        System.out.println("postProcessBeforeInitialization:" + beanName + "  " + bean);
        return bean;
    }

    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        System.out.println("postProcessAfterInitialization:" + beanName + "  " + bean);
        return bean;
    }*/

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        AnnotationConfigServletWebServerApplicationContext a = (AnnotationConfigServletWebServerApplicationContext) applicationContext;
        DefaultListableBeanFactory beanFactory = (DefaultListableBeanFactory) a.getBeanFactory();
        new Thread(() -> {
            try {
                Thread.sleep(5000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            beanFactory.removeBeanDefinition("beanTest");
        }).start();
    }
}

初始化：

1. constructor
2. PostConstruct
3. InitializingBean:afterPropertiesSet
4. initMethod

销毁：

1. PreDestroy
2. DisposableBean:destroy
3. destroyMethod