How can I include a .JSP file in the method in Java

https://github.com/sendmail2krrish/JavaMvcRouting I have made this MVC in Java. It's working like I wanted but I am facing a problem when I tried to include a .JSP file. Actually followed the routing structure like Laravel (PHP framework) did. Please open this link you will understand what I tried.

Any recommendation/suggestion will be really helpful.

Thanks in advanced