What are the classes and interfaces for servlets?-

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There are two packages in servlets and they are javax. servlet and

In Core Java, servlets are part of the Java Enterprise Edition (Java EE) platform and are used for developing web applications. The key classes and interfaces for servlets are part of the javax.servlet package. Here are some important classes and interfaces related to servlets:

  1. Servlet Interface:
    • The main interface for creating servlets.
    • It declares the life cycle methods for a servlet, such as init(), service(), and destroy().
  2. GenericServlet Class:
    • A generic implementation of the Servlet interface.
    • It provides a simple, protocol-independent way to implement servlets.
  3. HttpServlet Class:
    • An abstract class that extends GenericServlet and provides specific methods for handling HTTP requests (GET, POST, etc.).
    • It simplifies the process of handling HTTP-specific protocols.
  4. HttpServletRequest Interface:
    • Represents the request made by a client to a servlet.
    • Provides methods to retrieve information about the request, such as parameters, headers, and session information.
  5. HttpServletResponse Interface:
    • Represents the response that a servlet sends back to the client.
    • Provides methods for setting response content, status codes, and headers.
  6. ServletConfig Interface:
    • Provides configuration information to a servlet.
    • It allows a servlet to retrieve initialization parameters and other configuration data.
  7. ServletContext Interface:
    • Represents the servlet context, which is used to share information among servlets.
    • It provides a way for servlets to communicate with each other.

These classes and interfaces are part of the standard Java EE API for servlet development. When working with servlets, you typically extend HttpServlet and override its methods to handle specific types of HTTP requests. Additionally, HttpServletRequest and HttpServletResponse are used to interact with the request and response objects during the servlet’s execution.