How to Call a Java Class in JSP

[Alan Masters]

Hello,

I am attempting to revise on JSP which I used as a full time developer 
before my retirement over 8 years ago.

The article How to Call a Java Class in JSP 
<https://www.javaguides.net/2019/01/how-to-call-java-class-in-jsp.html#google_vignette> 
provides a simple example of the code, but avoids explaining how to 
deploy to Tomcat.

I have created a WAR file from this example and attempted to deploy via 
the "Tomcat Web Application Manager"  which does not work.  I suspect I 
need a web.xml file, but not clear how that should be organised.

So sorry for this basic question, but I would be very grateful for some 
simple guidance.

Alan.