Programming Java Servlets

• Servlets :

  • must import the java.servlet package
  • must extend the GenericServlet class or HttpServlet class if implementing http features
  • must override the service method in the class

• eg Hello World Servlet:

import java.io.*;

import java.servlet.*;

public class HelloWorldServlet extends GenericServlet {

public void service(ServletRequest req, ServletResponseres)

throws ServletException, IOException{

PrintStream out = newPrintStream(res.getOutputStream());

out.println("Hello world!");}

public String getServletInfo() {

return "Hello World Servlet"; }

}

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