拦截器中获取类注解和方法注解

@Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {

        //必须强转为HandlerMethod
        HandlerMethod handlerMethod = (HandlerMethod) handler;

        //获取类上的注解
        IgnoreAuth clazzAnnotation = handlerMethod.getBeanType().getAnnotation(IgnoreAuth.class);

        //判断类上是否有打该注解
        boolean clazzAnnotationPresent = handlerMethod.getBeanType().isAnnotationPresent(IgnoreAuth.class);

        //获取方法上的注解 方式1
        IgnoreAuth methodAnnotation_1 = handlerMethod.getMethodAnnotation(IgnoreAuth.class);

        //获取方法上的注解 方式2
        IgnoreAuth methodAnnotation_2 = handlerMethod.getMethod().getAnnotation(IgnoreAuth.class);

        //判断方法上是否有打该注解
        boolean methodsAnnotationPresent = handlerMethod.getMethod().isAnnotationPresent(IgnoreAuth.class);
        
    }