web technology lab excercise

7/29/2019 Web Technology Lab Excercise

1/65

1)HOME PAGE:

The static home page must contain three frames.

Top frame: Logo and the college name and links to Home page, Login page,Registration page,Catalogue page and Cart page (the description of these pages will

be given below).

Left frame: At least four links for navigation, which will display the catalogue of

respective links.For e.g.: When you click the link CSE the catalogue for CSE Books

should be displayed in the Right frame.

Right frame: The pages to the links in the left frame must be loaded here. Initially

this page contains Description of the web site.

2) LOGIN PAGE:

3) CATOLOGUE PAGE:

The catalogue page should contain the details of all the books available in the web

site in a table.

The details should contain the following:

1. Snap shot of Cover Page.

2. Author Name.3. Publisher.4. Price.5. Add to cart button.

4) CART PAGE:

The cart page contains the details about the books which are added to the cart.

The cart page should look like this:

1

Program No: 1

Date: / /2013

Develop static pages (using only html) of an online,

book store. The website should consist of


2/65

PROGRAM:

Index.html

Welcome to AMAZON Ebook's website

Top.html

Welcome to AMAZON website

td{

cursor:pointer; color: #000066; font-weight:bolder; border:#665599 1solid ; }

marquee{background: #556677; color:#f5f5f5}

2


3/65

WORLD BEST ONLINE EBOOKS WEBSITE

Home

Login

Registration

Catalogue

Cart

left.html

CSE

ECE

Style.css

h3{color: #006699; font-family: Geneva, Arial, Helvetica, sans-serif;} p

{color: #003366;}

td{color: #003366;} th{color:#FFFFFF;} body{background-

color:#F6F6F0;}

3


4/65

right.html

Welcome to Amazon Website

Shopping at AMAZON can be both fun and savings.Shop with us

in this special discount season and save upto 50% on all your purchases.

(C) 2008 All rights reserved by Amazon ebooks

Login.html


Enter Login Details

User ID

4


5/65

Password

Forgot my User ID or Password

Registration.html


Registration Form

Name:*

5


6/65

Password:*

Email ID:*

Phone Number:*

Gender:*

Male

Female

Date of Birth:*

dd:

for(i=1;i


7/65

Language Known:*

English


8/65

Price

Options

Title: Office 2007 Server
Author: Raja

Publicher:Tata Mc.Grawhill

Rs. 1200/-

Book: Electronics Projects
Author: Robert Tom

Public: Indian Ebook Mfg.
Rs. 1000/-

Book: Solar Power Your Home
Author: Albert

Publicher: Andhra Mc.hill
Rs. 9000/-

For more ebooks catagory, visit side panel links

Cart.html

8


9/65

Cart

BookName

Price

Quantity

Amount

Office 2007 Server

Rs. 1200/-

2

Rs. 2400/-

Solar Power Your Home

Rs. 9000/-

1

Rs. 9000/-

Total

Amount:

3

Rs. 11400/-

9


10/65

Continue

Shopping...

CSE.html

Computer Science & Engineering Catalogue

BOOK

DETAILS

PRICE

OPTION

Title: Office 2007 Server
Author: B.R.Prathap


Rs. 1200/-

10


11/65

Title: Electronics Projects
Author: Prathap

r

Rs. 1000/-

Title: Solar Power Your Home
Author:

Jhanaki Ramaya Sir

Rs. 9000/-

ECE.html

Electronics Communication Engineering Catalogue

11


12/65

BOOK

DETAILS

PRICE

OPTION

Book: Electronics Projects
Author: Robert

Tom

Public: Indian Ebook Mfg.

Rs. 1000/-

Book: Digital Communication System
Author:Howel Albert

Public: Tata Mc.Grawhill

Rs. 1000/-

Book: Digital and Analog Communications
Author:

Weinberg

Public: Tata Mc.Grawhill

Rs 1200/-

12


13/65

EEE.html

Eletrical & Electronics Engineering Catalogue

BOOK

DETAILS

PRICE

OPTION

Book:IntelMicroProcessors
Author:Hibert

Schildt

Publicher: Hyberabad Books Corp.

Rs. 2100/-

13


14/65

Book: Electrical & Electronics
Author: Rama

Krishna. K


Rs. 1250/-

Book: Solar Power Your Home
Author: Albert

Publicher: Andhra Mc.hill

Rs 9000/-

Index.html Output:

14


15/65

Output:

15


16/65

Output:

16


17/65

Output:

Output:

17


18/65

PROGRAM:

Validation.js

function form1_validation()

{

//Username Validation

if(f1.username.value=="")

{

alert("You must enter a User Name");

f1.username.focus();

return false;

}

if(f1.username.value.length


19/65

//Password Validation

if(f1.password.value.length


20/65

flag=false;

if(!(flag))

{

alert("Please enter a valid Email ID");

f1.email.focus();

return false;

}

//phone number validation

flag=true;

if(f1.phno.value.length!=10)

flag=false;

var phno=f1.phno.value;

for(i=0;i=48&&phno.charCodeAt(i)


21/65

return false;

}

//Date of birth validation

if((f1.dd.selectedIndex


22/65

{

var validchars = "[email protected]_";

for (i=0; i < email.length; i++)

{

var letter = email.charAt(i).toLowerCase();

if (validchars.indexOf(letter) == -1)

return false;

} return true;

}

Login.html


Enter Login Details

User ID

Password

22


23/65

Forgot my User ID or Password

Registration.html


Registration Form

Name:*

Password:*

Email ID:*

Phone Number:*

Gender:*

Male

Female

Date of Birth:*

dd:

23


24/65

for(i=1;i


25/65

25


26/65

26


27/65

27


28/65

28


29/65

PAGE:

PROGRAM:

Font Test

Font Check

AllOperations

Bold italic check

OUTPUT:

Font Check

All Operations

Bold italic check

29

Program No: 3

Date: / /2013

Program for implementation of Fonts


30/65

AGE:

PROGRAM:

Using Tables

Student Marks

Name

Marks

alok

90

anuj

90

ankush

30

Program No: 4

Date: / /2013

Program for creating a table


31/65

90

Avg Marks

90

OUTPUT:

Student Marks

Name Marks

pratha

p90

rames

h90

prabhu 90

Avg 90

31


32/65

OME PAGE:

PROGRAM:

event clicking

function passwordCheck()

{

var pw=ole.pw.value;

var cpw=ole.cpw.value;

if(pw!=cpw)

window.alert("Re-enter your password");

}

PASSWORD:&nb

sp;

CONFIRMPASSWORD

32

Program No: 5

Date: / /2013

Program for Entering a password


33/65

OUTPUT:

33


34/65

ME PAGE:

PROGRAM:

student.dtd:

student.xsd:

34

Program No: 6

Date: / /2013

Create and save an XML document at the server,

which contains 10 users information. Write a program

which takes User Id as input and returns the user


35/65

35


36/65

student.xml:

-

08A01D2501

-

A

Aruna

-

Venkateswara

Rao

software engineering

1ST Year

-

32-15/1-44

B.R.Nagar-1

Hyderabad

[email protected]

9949643372

36
http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/


37/65

08A01D2501

-

Prathap

Rudra

-

Venkateswara

B

software engineering (mtech)

1st Year

-

door no 603/n

Recoloney

Vijayawada

[email protected]

9866145423

08A01D2503

-

Ramesh

Kumar

-

Venkateswara

Rao

software engineering(mtech)

1st Year37
http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/


38/65

-

32-15/1-44

B.R.Nagar-1

Hyderabad

[email protected]

9985150379

08A01D2504

-

kishore

Galla

-

Venkateswara

Rao


1st Year

-

32-15/1-44

B.R.Nagar-1

hyderabad

[email protected]

990837394

08A01D2505

-

Madhu

Garlapati38
http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/


39/65

-

Venkateswara

Rao


1st Year

-

32-15/1-44

B.R.Nagar-1

Hyderabad

[email protected]

9908005778

39

Program No: 7

Date: / /2013

Bean Assignments
http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/http://c/Documents%20and%20Settings/Administrator.HOME-2E3171E588/Local%20Settings/Temp/Rar$DI24.953/


40/65

1

a. Create a JavaBeans which gives the exchange value of INR (Indian Rupees) intoequivalent American/Canadian/Australian Dollar value.

b. Create a simple Bean with a label which is the count of number of clicks. Thencreate a Bean info class such that only the count properly is visible in theproperty Window.

c. Create two Beans a) Keypad b) Display pad. After that integrate the two Beansto make it work as a calculator.

d. Create two Beans Traffic Light(implemented as a label with only threebackground colors-red, green, yellow) and Automobile(Implemented as a TextBox which states its state/movement). The state of the Automobile shoulddepend on the following Light Transition table.

Developing a Simple Bean Using the BDK:

This section presents an example that shows how to develop a simple Bean

and connect it to other components via the BDK. Our new component is called theColors Bean. It appears as either a rectangle or ellipse that is filled with a color. A

color is chosen at random when the Bean begins execution. A public method can be

invoked to change it. Each time the mouse is clicked on the Bean, another random

color is chosen. There is one boolean read/write property that determines the shape.

The BDK is used to lay out an application with one instance of the Colors Bean and

one instance of the OurButton Bean. The button is labeled Change. Each time it is

pressed, the color changes. DEVELOPMENT

USING JAVA

Create a New Bean

Here are the steps that you must follow to create a new Bean:

1. Create a directory for the new Bean.

2. Create the Java source file(s).

3. Compile the source file(s).

4. Create a manifest file.

5. Generate a JAR file.

6. Start the BDK.

7. Test.

The following sections discuss each of these steps in detail.

Create a Directory for the New Bean You need to make a directory for theBean. To follow along with this example, create c:\bdk\demo\sunw\demo\colors.

Then change to that directory. The Colors and OurButton Beans Create the Source File40


41/65

for the New Bean The source code for the Colors component is shown in the following

listing. It is located in the file Colors.java. The import statement at the beginning of

the file places it in the package named sunw.demo.colors. Recall from Chapter 9

that the directory hierarchy corresponds to the package hierarchy. Therefore, this file

must be located in a subdirectory named sunw\demo\colors relative to the

CLASSPATH environment variable. The color of the component is determined by the

private Color variable color, and its shape is determined by the private boolean

variable rectangular. The constructor defines an anonymous inner class that extends

MouseAdapter and overrides its mousePressed( ) method. The change( ) method

is invoked in response to mouse presses. The component is initialized to a rectangular

shape of 200 by 100 pixels. The change( ) method is invoked to select a random

color and repaint the component. The getRectangular( ) and setRectangular( )

methods provide access to the one property of this Bean. The change( ) method calls

randomColor( ) to choose a color and then calls repaint( ) to make the change

visible. Notice that the paint( ) method uses the rectangular and color variables to

determine how to present the Bean.

// A simple Bean.

package sunw.demo.colors;

import java.awt.*;

import java.awt.event.*;

public class Colors extends Canvas {

transient private Color color;

private boolean rectangular;

public Colors() {

addMouseListener(new MouseAdapter() {

public void mousePressed(MouseEvent me) {

change();

}

});

rectangular = false;

setSize(200, 100);

change();

}

41


42/65

public boolean getRectangular() {

return rectangular;

}

public void setRectangular(boolean flag) {

this.rectangular = flag;

repaint();

}

public void change()

{

color = randomColor();

repaint();

}

private Color randomColor() {

int r = (int)(255*Math.random());

int g = (int)(255*Math.random());

int b = (int)(255*Math.random());

return new Color(r, g, b);

}

public void paint(Graphics g) {

Dimension d = getSize();

int h = d.height;

int w = d.width;

g.setColor(color);

if(rectangular) {

g.fillRect(0, 0, w-1, h-1);

}

else {

g.fillOval(0, 0, w-1, h-1);

}42


43/65

}

}

Compile the Source Code for the New Bean Compile the source code to create a class

file. Type the following:

javac Colors.java.

Create a Manifest File You must now create a manifest file. First, switch to the

c:\bdk\demo directory. This is the directory in which the manifest files for the BDK

demos are located. Put the source code for your manifest file in the file colors.mft.

It is shown here:

Name: sunw/demo/colors/Colors.class

Java-Bean: True

This file indicates that there is one .class file in the JAR file and that it is a Java

Bean Notice that the Colors.class file is in the package sunw.demo.colors and in

the subdirectory sunw\demo\colors relative to the current directory. Generate a JAR

File Beans are included in the ToolBox window of the BDK only if they are in JAR filesin the directory c:\bdk\jars. These files are generated with the jar utility.

Enter the following:

jar cfm ..\jars\colors.jar colors.mft sunw\demo\colors\*.class

This command creates the file colors.jar and places it in the directory c:\bdk\jars.

(You may wish to put this in a batch file for future use.)

Start the BDK Change to the directory c:\bdk\beanbox and type run. This

causes the BDK to start. You should see three windows, titled ToolBox, BeanBox, and

Properties. The ToolBox window should include an entry labeled Colors for your new

Bean. Create an Instance of the Colors Bean After you complete the preceding steps,

create an instance of the Colors Bean in the BeanBox window. Test your new

component by pressing the mouse anywhere within its borders. Its color immediately

changes. Use the Properties window to change the rectangular property from falseto true. Its shape immediately changes.

43


44/65

Create and Configure an Instance of the OurButton Bean Create an instance of the

OurButton Bean in the BeanBox window. Then follow these steps:

1. Go to the Properties window and change the label of the Bean to Change. You

should see that the button appearance changes immediately when this property is

changed.

2. Go to the menu bar of the BeanBox and select Edit | Events | action |

actionPerformed.

3. Move the cursor so that it is inside the Colors Bean display area, and click the left

mouse button. You should see the Event Target Dialog dialog box.

4. The dialog box allows you to choose a method that should be invoked when this

button is clicked. Select the entry labeled change and click the OK button.You

should see a message box appear very briefly, stating that the tool isGenerating and

compiling adaptor class.

5. Click on the button. You should see the color change. You might want to

experiment with the Colors Bean a bit before moving on.

OUTPUT:

44


45/65

PROGRAM:

/**/

import java.awt.*;

import java.lang.String;

import java.awt.event.*;

import java.applet.Applet;

import java.applet.*;

public class Sig extends Applet implements ItemListener{

boolean c1,c2,c3;

String s1;

Checkbox r1,r2,r3;

CheckboxGroup cbg;

public void init(){

cbg=new CheckboxGroup();

Panel p=new Panel();

p.setLayout(new GridLayout());

add(r1=new Checkbox("red",cbg,false));

add(r2=new Checkbox("yellow",cbg,false));

add(r3=new Checkbox("green",cbg,false));

r1.addItemListener(this);



}

public void paint(Graphics g) {

g.setColor(Color.red);

45

Create two Beans Traffic Light(implemented as a label with only three

background colors-red, green, yellow) and Automobile(Implemented as a Text

Box which states its state/movement). The state of the Automobile should


46/65

g.drawOval(10, 30, 20, 20);

//System.out.println(s1);

g.setColor(Color.yellow);

g.drawOval(10, 60, 20, 20);

g.setColor(Color.green);

g.drawOval(10, 90, 20, 20);

s1=cbg.getSelectedCheckbox().getLabel();

if(s1=="red")

{

g.setColor(Color.red);

g.fillOval(10, 30, 20, 20);

}

else if(s1=="yellow")

{

g.setColor(Color.yellow);

g.fillOval(10, 60, 20, 20);

}

else if(s1=="green")

{

g.setColor(Color.green);

g.fillOval(10, 90, 20, 20);

}

}

public void itemStateChanged(ItemEvent ie) {

repaint();

}

}

46

Program No: 8

SERVELETS & COOKIES


47/65

Reading Servlet Parameters:

The ServletRequest class includes methods that allow you to read the names and

values of parameters that are included in a client request. We will develop a servlet

that illustrates their use. The example contains two files: PostParameters.htm

defines a Web page, and PostParametersServlet.java defines a servlet. The HTML

source code for PostParameters.htm is shown in the following listing. It defines a

table that contains two labels and two text fields. One of the labels is Employee and

the other is Phone. The form also includes a submit button. Notice that the action

parameter of the form tag specifies a URL. The URL identifies the servlet to process

the HTTP POST request.

Employee

Phone

47

Date: / /2013


48/65

The source code for PostParametersServlet.java is shown in the following listing.

The service( ) method is overridden to process client requests. The

getParameterNames( ) method returns an enumeration of the parameter names.

These are processed in a loop. You can see that the parameter name and value are

output to the client. The parameter value is obtained via the getParameter( )

method.

import java.io.*;

import java.util.*;

import javax.servlet.*;

public class PostParametersServlet

extends GenericServlet {

public void service(ServletRequest request,

ServletResponse response)

throws ServletException, IOException {

// Get print writer

PrintWriter pw = response.getWriter();

// Get enumeration of parameter names

Enumeration e = request.getParameterNames();

// Display parameter names and values

while(e.hasMoreElements()) {

String pname = (String)e.nextElement();

pw.print(pname + " = ");

String pvalue = request.getParameter(pname);

pw.println(pvalue);

}

pw.close();

}

}

48


49/65

The example contains two files: ColorGet.htm defines a Web page, and

ColorGetServlet.java defines a servlet. The HTML source code for ColorGet.htm is

shown in the following listing. It defines a form that contains a select element and a

submit button. Notice that the action parameter of the form tag specifies a URL. The

URL identifies a servlet to process the HTTP GET request.

Color:

Red

Green

Blue

method is overridden to process any HTTP GET requests that are sent to this servlet. It

uses the getParameter( ) method ofHttpServletRequest to obtain the selection

that was made by the user. A response is then formulated.

import java.io.*;


import javax.servlet.http.*;

public class ColorGetServlet extends HttpServlet {

public void doGet(HttpServletRequest request,

HttpServletResponse response)


49


50/65

String color = request.getParameter("color");

response.setContentType("text/html");


pw.println("The selected color is: ");

pw.println(color);

pw.close();

The HTML source code for ColorPost.htm is shown in the following listing. It is

identical to ColorGet.htm except that the method parameter for the form tag

explicitly specifies that the POST method should be used, and the action parameter

for the form tag

specifies a different servlet.

Color:

Red

Green

Blue

50


51/65

The source code for ColorPostServlet.java is shown in the following listing. The

doPost( ) method is overridden to process any HTTP POST requests that are sent to

this servlet. It uses the getParameter( ) method ofHttpServletRequest to obtain

the selection that was made by the user. A response is then formulated.

import java.io.*;



public class ColorPostServlet extends HttpServlet {

public void doPost(HttpServletRequest request,



String color = request.getParameter("color");



pw.println("The selected color is: ");

pw.println(color);

pw.close();

}

}

Source Code for functions.jsp

JSP 2.0 Expression Language - Functions

JSP 2.0 Expression Language - Functions

An upgrade from the JSTL expression language, the JSP 2.0 EL also allows for simple

function invocation. Functions are defined by tag libraries and are implemented by aJava programmer as static methods.

Change Parameter

foo =

51
http://localhost:8080/jsp-examples/jsp2/el/functions.jsp.htmlhttp://localhost:8080/jsp-examples/jsp2/el/functions.jsp.html


52/65

EL ExpressionResult

\${param["foo"]}${fn:escapeXml(param["foo"])}

\${my:reverse(param["foo"])}${my:reverse(fn:escapeXml(param["foo"]))}

\${my:reverse(my:reverse(param["foo"]))}

${my:reverse(my:reverse(fn:escapeXml(param["foo"])))}\${my:countVowels(param["foo"])}${my:countVowels(fn:escapeXml(param["foo"]))}

Source Code for Calendar Example

Calendar: A JSP APPLICATION

52


53/65

prev Calendar: next

Time Appointment


54/65

Calender2

Calendar: A JSP APPLICATION

Please add the following event:
Date
Time


55/65

Source Code for Servlet calling JSP

import javax.servlet.*;import javax.servlet.http.*;

public class servletToJsp extends HttpServlet {

public void doGet (HttpServletRequest request,HttpServletResponse response) {

try {// Set the attribute and Forward to hello.jsprequest.setAttribute ("servletName", "servletToJsp");

getServletConfig().getServletContext().getRequestDispatcher("/jsptoserv/hello.jsp").forward(request, response);

} catch (Exception ex) {ex.printStackTrace ();

}}

}

OUTPUT

I have been invoked by servletToJsp Servlet

Source Code for HelloWorld Example

import java.io.*;import javax.servlet.*;import javax.servlet.http.*;

public class HelloWorld extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException

{response.setContentType("text/html");

PrintWriter out = response.getWriter();out.println("");out.println("");out.println("Hello World!");out.println("");out.println("");out.println("Hello World!");out.println("");out.println("");

}}

55
http://localhost:8080/jsp-examples/jsptoserv/servletToJsp.java.htmlhttp://localhost:8080/jsp-examples/jsptoserv/servletToJsp.java.html


56/65

OUTPUT:

Hello World!

Source Code for Session Example

import java.io.*;import java.util.*;import javax.servlet.*;import javax.servlet.http.*;

public class SessionExample extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException

{response.setContentType("text/html");

PrintWriter out = response.getWriter();

HttpSession session = request.getSession(true);

// print session info

Date created = new Date(session.getCreationTime());Date accessed = new Date(session.getLastAccessedTime());out.println("ID " + session.getId());out.println("Created: " + created);out.println("Last Accessed: " + accessed);

// set session info if needed

String dataName = request.getParameter("dataName");if (dataName != null && dataName.length() > 0) {

String dataValue = request.getParameter("dataValue");session.setAttribute(dataName, dataValue);

}

// print session contents

Enumeration e = session.getAttributeNames();while (e.hasMoreElements()) {

String name = (String)e.nextElement();String value = session.getAttribute(name).toString();out.println(name + " = " + value);

}}

}

56


57/65

OUTPUT

Sessions Example

Session ID: E55B7AE87EEC8556A084BBFF47E96155

Created: Sat feb 14 12:00:08 IST 2009

Last Accessed: Sun Feb 15 12:00:43 IST 2009

The following data is in your session:Prathap = 1234Rudra= 4321

Name of Session Attribute:

Value of Session Attribute:

GET based form:

Name of Session Attribute:

Value of Session Attribute:

57

Submit query

Submit


58/65

URL Encoded

Using Cookies

Now, let's develop a servlet that illustrates how to use cookies. The servlet is invoked

when a form on a Web page is submitted. The example contains three files, as

summarized here:

File Description

AddCookie.htm Allows a user to specify a value for the cookie named M yCookie

AddCookieServlet.java Processes the submission of

AddCookie.htmGetCookiesServlet.java Displays cookie values The HTML source code

for AddCookie.htm is shown in the following listing. This page contains a text field in

which a value can be entered. The page also includes a submit button. When this

button is pressed, the value in the text field is sent to AddCookieServlet via an HTTP

POST request.

Enter a value for MyCookie:

The source code for AddCookieServlet.java is shown in the following listing. It

gets the value of the parameter named "data". It then creates a Cookie object that

has the name "MyCookie" and contains the value of the "data" parameter. The cookie

is then added tothe header of the HTTP response via the addCookie( ) method. Afeedback message is then written to the browser.

58
http://www.gmail.com/http://www.gmail.com/


59/65

import java.io.*;



public class AddCookieServlet extends HttpServlet {

public void doPost(HttpServletRequest request,



// Get parameter from HTTP request

String data = request.getParameter("data");

Cookie cookie = new Cookie("MyCookie", data);

// Add cookie to HTTP response

response.addCookie(cookie);

// Write output to browser



pw.println("MyCookie has been set to");

pw.println(data);

pw.close();

}

}

The source code for GetCookiesServlet.java is shown in the following listing. It

invokes the getCookies( ) method to read any cookies that are included in the HTTP

GET request. The names and values of these cookies are then written to the HTTP

response. Observe that the getName( ) and getValue( ) methods are called to

obtain this information.

import java.io.*;


59


60/65


public class GetCookiesServlet extends HttpServlet {




// Get cookies from header of HTTP request

Cookie[] cookies = request.getCookies();

// Display these cookies



pw.println("");

for(int i = 0; i < cookies.length; i++) {

String name = cookies[i].getName();

String value = cookies[i].getValue();

pw.println("name = " + name +

"; value = " + value);

}

pw.close();

}

}

The following servlet illustrates how to use session state. The getSession( )

method gets the current session. A new session is created if one does not already

exist. The getValue( ) method is called to obtain the object that is bound to thename "date". That object is a Date object that encapsulates the date and time when

this page was last accessed. (Of course, there is no such binding when the page is

first accessed.) A Date object encapsulating the current date and time is then

created. The putValue( ) method is called to bind the name "date" to this object.

import java.io.*;

import java.util.*;


60


61/65


public class DateServlet extends HttpServlet {




// Get the HttpSession object

HttpSession hs = request.getSession(true);

// Get writer



pw.print("");

// Display date/time of last access

Date date = (Date)hs.getValue("date");

if(date != null) {

pw.print("Last access: " + date + "
");

}

// Display current date/time

date = new Date();

hs.putValue("date", date);

pw.println("Current date: " + date);

}}

Source Code for Cookie Example

import java.io.*;import javax.servlet.*;import javax.servlet.http.*;

public class CookieExample extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws IOException, ServletException{response.setContentType("text/html");

61


62/65

PrintWriter out = response.getWriter();

// print out cookies

Cookie[] cookies = request.getCookies();for (int i = 0; i < cookies.length; i++) {

Cookie c = cookies[i];String name = c.getName();String value = c.getValue();out.println(name + " = " + value);

}

// set a cookie

String name = request.getParameter("cookieName");if (name != null && name.length() > 0) {

String value = request.getParameter("cookieValue");Cookie c = new Cookie(name, value);

response.addCookie(c);}

}}

OUTPUT:

Cookies Example

Your browser is sending the following cookies:

Cookie Name: Rudra

Cookie Value: 876543

Cookie Name: Prathap

Cookie Value: 1234567

You just sent the following cookie to your browser:Name: Nova

Value: 5000060

Create a cookie to send to your browser

Name:

Value:

62

Pratha

123456

Submit Query


63/65

:

PROGRAM:

JSP 2.0 Examples - Hello World SimpleTag Handler

JSP 2.0 Examples - Hello World SimpleTag Handler

This tag handler simply echos "Hello, World!" It's an example ofa very basic SimpleTag handler with no body.

Result:
OUTPUT:

This tag handler simply echos "Hello, World!" It's an example of a very basic

SimpleTag handler with no body.

Result: Hello, world!

63

Program No: 9

Date: / /2013

Implement the Hello World! program using JSP

Struts Framework. Source Code for the HelloWorld Tag Example


64/65

GE:

PROGRAM:

MAX

var a,b,c,n1,n2,n3,m1,m2,sum,avg;

a=prompt("enter 1st no="," ");b=prompt("enter 2nd no="," ");c=prompt("enter 3rd no="," ");n1=parseInt(a);n2=parseInt(b);n3=parseInt(c);sum=n1+n2+n3;

avg=sum/3;m1=Math.max(n1,n2);m2=Math.max(n3,m1);

alert("the sum is= "+sum);alert("the avg is= "+m2);alert("the max no is "+m2);

64

Program No: 10

Date: / /2013

Write Java Script that inputs three integers from the

user and outputs their sum, average, largest. Use

alert dialog box to display results.


65/65

OUTPUT: