@Component
public class MyBeanPostProcessor implements InstantiationAwareBeanPostProcessor, DestructionAwareBeanPostProcessor {
    private static final Logger log = LoggerFactory.getLogger(MyBeanPostProcessor.class);
    // 實(shí)例化之前
    @Override
    public Object postProcessBeforeInstantiation(Class<?> beanClass, String beanName) throws BeansException {
        if (beanName.equals("lifeCycleBean")) {
            log.info("初始化之前執(zhí)行, 這里返回的bean會(huì)替換原版本的bean");
        }
        return null;
    }
    // 實(shí)例化之后
    @Override
    public boolean postProcessAfterInstantiation(Object bean, String beanName) throws BeansException {
        if (beanName.equals("lifeCycleBean")) {
            log.info("實(shí)例化之后執(zhí)行, 這里返回false會(huì)跳過依賴注入階段");
            //return false;
        }
        return true;
    }
    // 依賴注入階段執(zhí)行
    @Override
    public PropertyValues postProcessProperties(PropertyValues pvs, Object bean, String beanName) throws BeansException {
        if(beanName.equals("lifeCycleBean")){
            log.info("依賴注入階段執(zhí)行, 如@Autowired, @Value, @Resource");
        }
        return pvs;
    }
    // 初始化之前
    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        if(beanName.equals("lifeCycleBean")){
            log.info("初始化之前執(zhí)行, 這里返回的對(duì)象會(huì)替換原本的bean, 如@PostConstruct, @ConfigurationProperties");
        }
        return bean;
    }
    // 初始化之后執(zhí)行
    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        if (beanName.equals("lifeCycleBean")) {
            log.info("初始化之后執(zhí)行, 這里返回的對(duì)象會(huì)替換原本的bean, 如代理增強(qiáng)");
        }
        return bean;
    }
    // 銷毀之前
    @Override
    public void postProcessBeforeDestruction(Object bean, String beanName) throws BeansException {
        if(beanName.equals("lifeCycleBean")){
            log.info("銷毀之前執(zhí)行, 如 @PreDestroy");
        }
    }
}