What Is a Servlet?

What Is a Servlet?

A servlet is a Java 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 protocol( like HTTP, FTP, SMTP with GenericServlet ), they are commonly used to extend the applications hosted by web servers or application servers. For such applications, Java Servlet technology defines HTTP-specific servlet classes.

The javax.servlet and javax.servlet.http packages provide interfaces and classes for writing servlets. All servlets must implement the Servlet interface, which defines life-cycle methods. When implementing a generic service, you can use or extend the GenericServlet class provided with the Java Servlet API. The HttpServlet class provides methods, such as doGet and doPost, for handling HTTP-specific services.

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Gopal Das

Founder at GopalDas.Org

He is a technology evangelist, Salesforce trainer, blogger, and working as a Salesforce Technical Lead. After working in Java based project implementation, he jumped to the Salesforce system on a whim and never looked back. He fell in love with Salesforce’s flexibility, scalability, and power. He expanded his knowledge of the platform and became a Certified App Builder, Administrator, Platform Developer I, SalesCloud Consultant while leading the Salesforce implementation and technology needs. He has worked in a wide variety of applications/services like desktop, web and mobile applications.

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Latest posts by Gopal Das (see all)

• Salesforce Certified Platform Developer I – Winter ’18 Release Exam - November 23, 2017
• Salesforce Certified Platform App Builder – Winter ’18 Release Exam - November 22, 2017
• Salesforce Certified Administrator – Winter’ 18 Release Exam - November 21, 2017