A servlet is a Java programming language class that is used to extend the capabilities of servers that host applications accessed by means of a request-response programming model. Although servlets can respond to any type of request, they are commonly used to extend the applications hosted by web servers.

What is a servlet explain with an example?

Simply put, a Servlet is a class that handles requests, processes them and reply back with a response. For example, we can use a Servlet to collect input from a user through an HTML form, query records from a database, and create web pages dynamically.

What is a servlet stack?

The servlet stack is a classic servlet container and Servlet API, with Spring MVC as the web framework. In the beginning the Servlet API was built on a “thread-per-request” model, i.e. making a full pass through the filter-servlet chain on a single thread, blocking along the way as needed.