Balajishanmugamprograms

Tuesday, January 29, 2013

ONLINE EXAMINATION USING JSP

ONLINE EXAMINATION USING JSP

AIM:

To create a three tier application for conducting online examination using JSP and database.

ALGORITHM:

Step 1 : Design the HTML page (ExamClient.html) with the following

a) Step 2: Create a form to get the input from the user.

b) Step 3 : Use radio buttons to make various options for the questions.

c) Step 4: Set the URL of the server (ExamServer.jsp) as the value of the action attribute.

d) Step 5: Use submit button to invoke the server and send the form data to the server.

Step 6: Create the JSP file with the following

Step 7: Read the input from the client.

Step 8: Retrieve the answers from the database.

Step 9: Match the answers from the user with the correct answers from the database table.

Step 10: For each correct answer increment the mark by 5.

Step 11: Server displays the mark and result to the client as a response.

PROGRAM:

ExamClient.html

<html>

<head>

<title>Online Exam Client</title>

body{background-color:black;font-family:courier;color:blue}

</style>

</head>

<body>

<h2 style="text-align:center">ONLINE EXAMINATION</h2>

<h3>Answer the following questions (5 marks for each correct answer)</h3>

<hr/>

1.Who is called as the father of computer?<br/>

<input type="radio" name="ans1" value="Sachin">Sachin

<input type="radio" name="ans1" value="Stuart">Stuart

<input type="radio" name="ans1" value="Charles Babbage">Charles Babbage

<input type="radio" name="ans1" value="Napier">Napier

2.C++ was developed by?<br/>

<input type="radio" name="ans2" value="Dennis Ritchie">Dennis Ritchie

<input type="radio" name="ans2" value="None">None

<input type="radio" name="ans2" value="David Ritchie">David Ritchie

<input type="radio" name="ans2" value="John">John

3.C was developed by?<br/>

<input type="radio" name="ans3" value="Dennis Ritchie">Dennis Ritchie

<input type="radio" name="ans3" value="Stroustrup">Stroustrup

<input type="radio" name="ans3" value="David Ritchie">David Ritchie

<input type="radio" name="ans3" value="Charles Babbage">Charles Babbage

</form>

</body>

</html>

ExamServer.jsp

<%@page contentType="text/html" language="java" import="java.sql.*"%>

<html>

<head>

<title>Online Exam Server</title>

body{background-color:black;font-family:courier;color:blue}

</style>

</head>

<body>

<h2 style="text-align:center">ONLINE EXAMINATION</h2>

<p>

</p>

<hr/>

String str1=request.getParameter("ans1");

String str2=request.getParameter("ans2");

String str3=request.getParameter("ans3");

int mark=0;

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

Connection con=DriverManager.getConnection("jdbc:odbc:examDS");

Statement stmt=con.createStatement();

ResultSet rs=stmt.executeQuery("SELECT * FROM examTab");

int i=1;

while(rs.next())

{

if(i==1)

{

String dbans1=rs.getString(1);

if(str1.equals(dbans1))

{

mark=mark+5;

}

if(i==2)

{

String dbans2=rs.getString(1);

if(str2.equals(dbans2))

{

mark=mark+5;

}

if(i==3)

{

String dbans3=rs.getString(1);

if(str3.equals(dbans3))

{

mark=mark+5;

}

i++;

}

if(mark>=10)

{

out.println("<h4>Your Mark Is : "+mark+"</h4>");

out.println("<h3>Congratulations....! You Are Eligible For The Next Round...</h3>");

}

else

{

out.println("<h4>Your Mark is : "+mark+"</h4>");

out.println("<h3>Sorry....!! You Are Not Eligible For The Next Round...</h3>");

}

</form>

</body>

</html>

RESULT:

Thus the program to create three-tier application using JSP is written and the output is verified.

INVOKING SERVLETS FROM APPLETS

INVOKING SERVLETS FROM APPLETS

AIM:

To write a java program that invokes Servlet from applet.

ALGORITHM:

1. Step 1:Create the java program with the following

a) Step 2: Define the class Myapplet which extends the property of the class Applet and implements the interface ActionListener.

b) Step 3:Define the objects for Button and add the button in the init() method of Applet class

c) Step 4: Make the button to listen the action by using the method addActionListener().

d) Step 5: Set the URL of the servlet program by using the object of the class URL.

e) Step 6: Define the object for AppletContext in order to display the output of the servlet on new browser window.

Step 7: Create HTML file that contains the applet tag and pass the class name to that applet code.

3. Step 8:Create the simple servlet program that contains any response message

4. Step9: Run the HTML file that contains the corresponding applet code.

5. Step 10: Click the button on the applet window in order to invoke the servlet program.

PROGRAM:

AppletClient.java

import java.applet.*;

import java.awt.*;

import java.awt.event.*;

import java.net.*;

public class AppletClient extends Applet implements ActionListener

{

public void init()

{

Label la=new Label("INVOKING SERVLET FROM APPLET");

la.setFont(new Font("Courier",Font.BOLD,15));

la.setForeground(Color.blue);

add(la);

Button b1=new Button("Click Here To Display Date Information From Server");

b1.setBackground(Color.black);

b1.setForeground(Color.white);

add(b1);

b1.addActionListener(this);

}

public void actionPerformed(ActionEvent ae)

{

try

{

AppletContext ac=getAppletContext();

URL url = new URL("http://localhost:8080/servlets-examples/servlet/MyServer");

ac.showDocument(url);

}

catch(Exception e)

{

System.out.println(e);

}

AppletClient.html

<html>

<head>

<title>Invoking Servlets From Applet</title>

</head>

</applet>

</body>

</html>

MyServer.java

import java.io.*;

import java.util.*;

import javax.servlet.*;

public class MyServer extends GenericServlet

{

public void service(ServletRequest req,ServletResponse res)throws ServletException,IOException

{

PrintWriter pw=res.getWriter();

Date d=new Date();

pw.println("<html><body bgcolor=violet><h2>Srever Response</h2>");

pw.println("<h3>Current Date and Time From Server:</h3>");

pw.println("<b>"+d+"</b></body></html>");

}

RESULT:

Thus the program to invoke Servlets from Applets is written and output is verified.

RUN :