Sin título

Página 1

14. Write a Servlet which displays a message

and also displays how many times the

message has been displayed (how

many times the page has been visited).

import javax.servlet.*;

import javax.servlet.http.*;

import java.io.*;

public class prac14 extends HttpServlet

{

int

count;

public

void doGet(HttpServletRequest req,HttpServletResponse res) throws IOException

{

PrintWriter out=res.getWriter();

count++;

out.println("

" + count + " time u

have visit for this Page");

}

}

15. Assume

that we have got three pdf files for the MCA-1 Syllabus, MCA-2 Syllabus

and MCA-3

Syllabus respectively, Now write a Servlet which displays the

appropriate

PDF file to the client, by looking at a request parameter for the year (1, 2

or 3).

import java.io.*; import java.util.*; import javax.servlet.*; import javax.servlet.http.*; public class ShowRequestPDF extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException,IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); String st = "Load PDF Files"; out.println(""+ st +""); out.println(""); out.println("

"); out.println("MCA1"); out.println("MCA2"); out.println("MCA3"); out.println("

"); out.println(""); out.println(""); out.println(""); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String st = request.getParameter("syll"); response.setContentType("application/pdf"); if(st.equals("MCA1")) { response.sendRedirect("/MCA_I.pdf"); } else if(st.equals("MCA2")) { response.sendRedirect("/MCA_II.pdf"); } else if(st.equals("MCA3")) { response.sendRedirect("/MCA_III.pdf"); } } }

Or

import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class Ex15 extends HttpServlet { public void doGet(HttpServletRequest req,HttpServletResponse res) throws IOException,ServletException { String a; res.setContentType("application/pdf"); PrintWriter out=res.getWriter(); a=req.getParameter("pdfd"); //res.sendRedirect("http://localhost:8080/dc1.pdf"); if(a.equals("pdf1")) { res.sendRedirect("http://localhost:8080/dc1.pdf"); } if(a.equals("pdf2")) { res.sendRedirect("http://localhost:8080/dc2.pdf"); } if(a.equals("pdf3")) { res.sendRedirect("http://localhost:8080/dc3.pdf"); } }

New Page