It’s a server-side technology used to create web servers and application servers. We can understand Servlets as the java programs that handle the request from the web servers, process the request, and reverts to the web servers after the response is generated.
Several packages like javax.servlet and javax.servlet.HTTP provides the appropriate interfaces and classes that help the user to create their servlet. All the servlets should implement the javax.servlet.Servlet interface, plus other interfaces and classes like the HttpServlet, Java Servlet API, and more.
The execution of a servlet involves six distinct steps:
The clients initiate the request by sending it to the web server or application server.
The web server receives the request from the clients.
The servlet processes the request, carrying out the necessary computations, and generates the corresponding output.
Subsequently, the servlet sends the processed request back to the web server.
Finally, the web server dispatches the request to the clients, and the resulting output is displayed on the client's screen or any other designated device.