What is a servlet in java?

It’s a server-side programming language that’s used to create web and application servers. We may think of Servlets as Java programmes that take requests from web servers, process them, and then return the request to the web servers after the response has been created.

Several packages, such as javax.servlet and javax.servlet, are available.

HTTP offers the necessary interfaces and classes to assist the user in the creation of a servlet. The javax.servlet interface should be implemented by all servlets. HttpServlet, Java Servlet API, and additional interfaces and classes are included in the Servlet interface.

A servlet’s execution is broken down into six steps:

  • The webserver or application server receives the request from the clients.
  • The request is received by the web server.
  • The request is processed by the servlet, which then creates the output.
  • The servlet now returns the request to the webserver.
  • Finally, the server transmits the request to the client, and the result appears on the client’s screen or on any other device.

Java Servlets are server side components that provides a powerful mechanism for developing server side of web application. Earlier CGI was developed to provide server side capabilities to the web applications. Although CGI played a major role in the explosion of the Internet, its performance, scalability and reusability issues make it less than optimal solutions. Java Servlets changes all that. Built from ground up using Sun’s write once run anywhere technology java servlets provide excellent framework for server side processing.