URL-Redirecting on host_name in browser in tomcat9 using classes/project/servlet

Question

I would like to redirect to particular servlet doGet() when hostname.com hits in browser.

I have been going around in this basic issue. Please guide.

I have a folder structure of my legacy application in windows environment:

D:\tomcat9\webapps\root\web-inf\classes\ProjectName\SRC\SomeFolder.

This SomeFolder has a list of servlets.

What I Did:

1. tried to replaced index.jsp in ROOT folder with response.SendRedirect("/servlet-url-mapping-path");
2. tried to add extra hosts in server.xml which destroyed my application loading even.

Help (Yes this is very old legacy application, not even using jsps.)