Java中PhoneNumber的自定义格式化程序

我正在尝试为电话号码格式创建自定义注释

 @Target({ElementType.METHOD, ElementType.FIELD})
 @Retention(RetentionPolicy.RUNTIME)
 public @interface ContactNumberFormate {
 }

BeanPostProcessor实现：

 @Component
public class PhoneFormatter implements BeanPostProcessor {

private Object beanIs;

private PhoneNumberUtil phoneUtil = PhoneNumberUtil.getInstance();

@Override
public Object postProcessBeforeInitialization(Object bean, String s) throws BeansException {
    if (bean.getClass().isAnnotationPresent(ContactNumberFormate.class)) {
        beanIs = bean.getClass();
    }
    return bean;
}

@Override
public Object postProcessAfterInitialization(Object bean, String s) throws BeansException {
    String phone = "";
    String locale = "";
    try {
        phone = (String) beanIs.getClass().getDeclaredField("phone").get(bean);
        locale = (String) beanIs.getClass().getDeclaredField("locale").get(bean);
    } catch (NoSuchFieldException | IllegalAccessException e) {
        e.printStackTrace();
    }


    //Other code//

    return formattedPhoneNumber;
  }

 }

但是对于“beanIs=bean.getClass（）”我捕获了NullPointedException

完整日志：

 java.lang.NullPointerException
at ru.spb.dreamwhite.util.phoneUtil.PhoneFormatter.postProcessAfterInitialization(PhoneFormatter.java:33)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:431)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1807)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595)

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您可以参考这个git存储库。请粘贴完整的异常日志