RequiresPermissions使用方法

 //获得目标方法的签名对象
        Signature signature = point.getSignature();
        //将目标方法的签名对象转化为MethodSignature
        MethodSignature methodSignature= (MethodSignature) signature;
        //获得方法的注解
        Method method = methodSignature.getMethod();
        //获取注解的值（权限）
        RequiresPermissions rp = method.getDeclaredAnnotation(RequiresPermissions.class);