usually our home page routes are intercepted in this way
@Controller
@RequestMapping("/")
public class index {
    @RequestMapping(method = {RequestMethod.GET})
    public ModelAndView index() {
        return new ModelAndView("view/index");
    }
} this allows you to intercept routes such as  localhost/  
, but it has recently been found that it can also be intercepted:  localhost/.admin  
 notice that there is a dot in front of admin. 
 this problem is fine in springboot2.0, which returns 404. 
 I tested with springboot1.5.4. 
 Why do you say this? Because now a lot of vulnerability scanning software, will think that this belongs to the existence of system hidden files, that is, your system has been compromised. 
 is so cramped that I don"t know how to fix it. 
