What are the best resources to learn Java Servlet?

Question

Java

Good day!
Now I've set out to learn Java Servlets and I'm confused. I can't find good material to study, or I'm just bad at searching.
Please advise on what sources you can learn at least the basics of servlets.

The only thing I could find was the courses on stepik.org and the Head First Servlets and JSP tutorial (2nd edition)
And if anyone has already used these resources, how up-to-date is the information in them?

Answer 1

https://www.google.com.ua/search?q=learn+Java+Servlet
About 760,000 results

Answer 2

If you want in Russian, then try this: https://www.ozon.ru/context/detail/id/4351806/