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Servlet

Software Information
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.

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.

Java Servlets are programs that run on a Web or Application server and act as a middle layer between a requests coming from a Web browser or other HTTP client and databases or applications on the HTTP server.

Using Servlets, you can collect input from users through web page forms, present records from a database or another source, and create web pages dynamically.

Java Servlets often serve the same purpose as programs implemented using the Common Gateway Interface (CGI). But Servlets offer several advantages in comparison with the CGI.

  • Performance is significantly better.
  • Servlets execute within the address space of a Web server. It is not necessary to create a separate process to handle each client request.
  • Servlets are platform-independent because they are written in Java.
  • Java security manager on the server enforces a set of restrictions to protect the resources on a server machine. So servlets are trusted.
  • The full functionality of the Java class libraries is available to a servlet. It can communicate with applets, databases, or other software via the sockets and RMI mechanisms that you have seen already.


Course Content

  • Basics of Servlet
  • Servlet API
  • Servlet Interface
  • GenericServlet
  • Servlet LifeCycle
  • ServletRequest
  • ServletResponse
  • Servlet Collaboration
  • RequestDispatcher
  • Redirect
  • ServletConfig
  • ServletContext
  • Attributes
  • State Management
  • Cookie
  • Session
  • URL Rewriting
  • Event
  • Listener
  • Filter
  • FilterConfig
  • SertletInputStream
  • ServletOutputStream
  • Annotation Servlet
  • Project Development

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