Difference between revisions of "Java-Business-Application/C2/Servlet-Methods/English-timed"

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{| border =1
 
{| border =1
| Time
+
| '''Time'''
| Narration
+
| '''Narration'''
  
 
|-
 
|-
 
| 00:01
 
| 00:01
| Welcome to the spoken-tutorial on  '''Servlet Methods.'''
+
| Welcome to the '''spoken-tutorial''' on  '''Servlet Methods.'''
  
 
|-
 
|-
 
|00:06
 
|00:06
| In this tutorial we will learn to
+
| In this tutorial, we will learn to:
  
 
|-
 
|-
| 00:08
+
|00:08
| create a '''simple login form''' using '''JSP'''
+
|create a simple '''login form''' using '''JSP'''
  
 
|-
 
|-
| 00:13
+
|00:13
| Pass parameters using '''doGet''' '''method'''
+
|Pass parameters using '''doGet''' '''method'''
  
 
|-
 
|-
| 00:16
+
|00:16
| Pass parameters using '''doPost method'''
+
|Pass parameters using '''doPost method'''
  
 
|-
 
|-
| 00:20
+
|00:20
| Difference between '''doGet '''and '''doPost''' methods
+
|Difference between '''doGet '''and '''doPost''' methods.
  
 
|-
 
|-
 
|00:25
 
|00:25
|Here we are using
+
|Here we are using:'''Ubuntu '''Version '''12.04'''
 
+
|-
+
| 00:26
+
| '''Ubuntu Version''' 12.04
+
  
 
|-
 
|-
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|-
 
|-
 
| 00:36
 
| 00:36
| '''Firefox''' web-browser 21.0
+
| '''Firefox''' web-browser 21.0.
  
 
|-
 
|-
Line 53: Line 49:
 
|-
 
|-
 
| 00:43
 
| 00:43
| To follow this tutorial you must know  
+
| To follow this tutorial, you must know:
  
 
|-
 
|-
 
| 00:46
 
| 00:46
| Core Java using '''Netbeans IDE'''  
+
|Core Java using '''Netbeans IDE'''  
  
 
|-
 
|-
| 00:49
+
|00:49
| '''HTML'''
+
|'''HTML'''
  
 
|-
 
|-
| 00:51
+
|00:51
| Basics of '''Java Servlets '''and '''JSPs'''
+
|Basics of '''Java Servlets '''and '''JSPs'''.
  
 
|-
 
|-
 
| 00:56
 
| 00:56
|If not, for relevant tutorials please visit our website.
+
|If not, for relevant tutorials, please visit our website.
  
 
|-
 
|-
Line 77: Line 73:
 
|-
 
|-
 
| 01:06
 
| 01:06
|First, we will create the '''home page.'''
+
|First, we will create the '''Home page.'''
  
 
|-
 
|-
 
| 01:09
 
| 01:09
|The '''home page''' will contain a simple '''login form'''.
+
|The '''Home page''' will contain a simple '''login form'''.
  
 
|-
 
|-
 
| 01:14
 
| 01:14
|It will allow authenticated users to login to the '''Library Management System.'''
+
|It will allow authenticated users to '''login''' to the '''Library Management System.'''
  
 
|-
 
|-
Line 93: Line 89:
 
|-
 
|-
 
| 01:23
 
| 01:23
| Let us go to the '''index ''' '''dot''' '''jsp''' page, that we had already modified earlier.
+
| Let us go to the '''index ''' '''dot''' '''jsp''' page that we had already modified earlier.
  
 
|-
 
|-
Line 105: Line 101:
 
|-
 
|-
 
| 01:38
 
| 01:38
| Inside the body, we have a '''table,'''with '''border '''''equal to '''''1.'''
+
| Inside the body, we have a '''table''' with '''border''' equal to '''1.'''
  
 
|-
 
|-
Line 113: Line 109:
 
|-
 
|-
 
| 01:47
 
| 01:47
| Inside the '''table''' we have included a heading, '''Welcome to Library Management System.'''
+
| Inside the '''table''', we have included a heading '''Welcome to Library Management System.'''
  
 
|-
 
|-
 
| 01:54
 
| 01:54
| Next, we have '''paragraph tag''' that includes, '''This is the home page for Library Management System.'''
+
| Next, we have a '''paragraph tag''' that includes ''' "This is the home page for Library Management System".'''
  
 
|-
 
|-
 
| 02:03
 
| 02:03
| Then, we have a '''hyperlink,''' which links to a page called '''visitorHomePage ''' '''dot ''' '''jsp.'''
+
| Then we have a '''hyperlink''' which links to a '''page''' called '''visitorHomePage dot jsp.'''
  
 
|-
 
|-
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|-
 
|-
 
| 02:13
 
| 02:13
| Next,we have a very simple '''login form.'''
+
| Next, we have a very simple '''login form.'''
  
 
|-
 
|-
Line 137: Line 133:
 
|-
 
|-
 
| 02:22
 
| 02:22
| Before creating the '''form ''' you will have to create a '''servlet '''named '''GreetingServlet.'''
+
| Before creating the '''form ''', you will have to create a '''servlet '''named '''GreetingServlet.'''
  
 
|-
 
|-
 
| 02:28
 
| 02:28
| Pause the tutorial and create a new '''servlet''' as explained in the earlier tutorial.  
+
| So, pause the tutorial here and create a new '''servlet''' as explained in the earlier tutorial.  
  
 
|-
 
|-
 
| 02:35
 
| 02:35
| Note that the '''servlet name''' is '''GreetingServlet.'''
+
| Note that the '''servlet''' name is '''GreetingServlet'''and
  
 
|-
 
|-
 
| 02:39
 
| 02:39
|The '''URL pattern''' should be '''GreetingServletPath.'''
+
|the '''URL pattern''' should be '''GreetingServletPath.'''
  
 
|-
 
|-
 
| 02:44
 
| 02:44
| This''' form''' has two input elements - '''Username and Password.'''
+
| This''' form''' has two '''input elements''' - '''Username''' and '''Password.'''
  
 
|-
 
|-
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|-
 
|-
 
| 02:55
 
| 02:55
| Next, we have a '''paragraph tag''' that includes a link to '''addUser.jsp.'''
+
| Next, we have a '''paragraph tag''' that includes a '''link''' to '''addUser.jsp.'''
  
 
|-
 
|-
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| 03:42
 
| 03:42
 
|The '''form data''' will reside in the '''request object.'''
 
|The '''form data''' will reside in the '''request object.'''
 
  
 
|-
 
|-
 
| 03:46
 
| 03:46
|The first task is to retrieve the '''form''' data parameters.
+
|The first task is to retrieve the '''form''' '''data''' parameters.
  
 
|-
 
|-
Line 210: Line 205:
 
|-
 
|-
 
| 04:02
 
| 04:02
| Type inside the''' doGet method,'''  
+
| Type inside the''' doGet method''':
  
 
|-
 
|-
 
| 04:04
 
| 04:04
|'''PrintWriter space out equal to response dot getWriter.'''
+
|'''PrintWriter space out equal to response dot getWriter().'''
  
 
|-
 
|-
 
| 04:14
 
| 04:14
| Next, we will retrieve the '''form data '''parameters.
+
| Next, we will retrieve the '''form data''' '''parameters'''.
  
 
|-
 
|-
 
| 04:18
 
| 04:18
| So that on the next line type,  
+
| So that on the next line, type:
  
 
|-
 
|-
 
| 04:20
 
| 04:20
| '''String''' space '''username''' equal to '''request'''  dot '''getParameter ''' within brackets and double quotes '''userName''' '''semicolon'''.
+
| '''String''' space '''username''' equal to '''request'''  dot '''getParameter ''' within brackets and double quotes '''userName''' and '''semicolon'''.
  
 
|-
 
|-
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|-
 
|-
 
| 04:43
 
| 04:43
| Similarly, we will retrieve the '''password''' also.
+
| Similarly, we will retrieve the password also.
  
 
|-
 
|-
 
| 04:48
 
| 04:48
|So on the next line, type, '''String ''' space '''password''' equal to '''request''' dot '''getParameter ''' within brackets and double quotes '''password''' semicolon.
+
|So, on the next line, type: '''String ''' space '''password''' equal to '''request''' dot '''getParameter ''' within brackets and double quotes '''password''' semicolon.
  
 
|-
 
|-
 
| 05:03
 
| 05:03
| Next, we will print the '''User Name '''in the '''output'''.
+
| Next, we will print the '''UserName '''in the '''output'''.
  
 
|-
 
|-
 
| 05:08
 
| 05:08
| So, on the next line type  
+
| So, on the next line, type:
  
 
|-
 
|-
 
| 05:10
 
| 05:10
|'''out ''dot '''println''' within brackets and double quotes ''' Hello from GET Method plus username.'''
+
|'''out''' dot '''println''' within brackets and double quotes ''' Hello from GET Method''' plus '''username.'''
  
 
|-
 
|-
 
|05:21
 
|05:21
| Now, to run this project, right-click on '''MyFirstProject. '''
+
| Now, to '''run''' this '''project''', right-click on '''MyFirstProject. '''
  
 
|-
 
|-
Line 262: Line 257:
 
|-
 
|-
 
| 05:29
 
| 05:29
| Again right click on '''MyFirstProject ''',  click on '''Run.'''
+
| Again right-click on '''MyFirstProject ''',  click on '''Run.'''
  
 
|-
 
|-
Line 274: Line 269:
 
|-
 
|-
 
| 05:41
 
| 05:41
|We have got our '''home page '''displayed in the '''browser'''.
+
|We have got our '''Home page '''displayed in the '''browser'''.
  
 
|-
 
|-
 
| 05:45
 
| 05:45
| Observe that the '''title '''of the page is '''Home Page.'''
+
| Observe that the title of the '''page''' is '''Home Page.'''
  
 
|-
 
|-
Line 297: Line 292:
  
 
|-
 
|-
|06.06
+
|06:06
 
| Then click on '''Sign In.'''
 
| Then click on '''Sign In.'''
  
Line 306: Line 301:
 
|-
 
|-
 
| 06:15
 
| 06:15
| Now, the '''user '''was able to login here because we have not included any validation inside the code.  
+
| Now, the '''user '''was able to '''login''' here because we have not included any validation inside the code.  
  
 
|-
 
|-
Line 318: Line 313:
 
|-
 
|-
 
| 06:31
 
| 06:31
|It is '''localhost '''''colon '''''8080 '''''slash '''''MyFirstProject '''''slash '''''GreetingServletPath '''''question mark '''''userName '''''equal to '''''arya and password '''''equal to '''''arya *123.
+
|It is '''localhost ''' colon '''8080 ''' slash '''MyFirstProject ''' slash '''GreetingServletPath ''' question mark '''userName ''' equal to '''arya''' and '''password ''' equal to '''arya *123'''.
  
 
|-
 
|-
 
| 06:49
 
| 06:49
|Now, '''form data '''is separated from the page information by a '''question mark.'''
+
|Now, the '''form data '''is separated from the '''page''' information by a question mark.
  
 
|-
 
|-
 
|06:56
 
|06:56
| We can see that '''username '''and '''password '''that we had entered in the form is inside the URL also.
+
| We can see that the '''username '''and '''password '''that we had entered in the '''form''' are inside the URL also.
  
 
|-
 
|-
 
| 07:05
 
| 07:05
| Now, let us try to do the same using '''POST Method.'''
+
| Now let us try to do the same, using '''POST Method.'''
  
 
|-
 
|-
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|-
 
|-
 
| 07:12
 
| 07:12
| Copy the code we had written for  '''doGet Method '''and paste in the '''doPost Method.'''
+
| Copy the code we had written for  '''doGet method '''and paste in the '''doPost method.'''
  
 
|-
 
|-
Line 346: Line 341:
 
|-
 
|-
 
|07:27
 
|07:27
| Now, let us open '''index''' dot '''jsp.'''
+
| Now, let us open '''index dot jsp.'''
  
 
|-
 
|-
 
| 07:31
 
| 07:31
| Here, we must change the '''method attribute '''of the '''form tag '''to '''POST.'''
+
| Here, we must change the '''method attribute''' of the '''form tag '''to '''POST.'''
  
 
|-
 
|-
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|-
 
|-
 
| 07:42
 
| 07:42
|We have '''form action '''''equal to '''''GreetingServletPath method '''''equal to '''''POST.'''
+
|We have '''form action ''' equal to '''GreetingServletPath''' '''method ''' equal to '''POST.'''
  
 
|-
 
|-
 
| 07:49
 
| 07:49
| Now, we will run this Project again
+
| Now, we will '''run''' this '''Project''' again.
  
 
|-
 
|-
 
| 07:53
 
| 07:53
| So, Right click on '''MyFirstProject '''and click on '''Run'''
+
| So, right-click on '''MyFirstProject '''and click on '''Run'''.
  
 
|-
 
|-
 
| 07:58
 
| 07:58
| We have got an output similar to the one we got, when we used the '''GET method.'''
+
| We have got the output similar to the one we got when we used the '''GET method.'''
  
 
|-
 
|-
 
| 08:04
 
| 08:04
| So let us type  '''User Name '''and '''Password '''again.
+
| So, let us type  '''UserName '''and '''Password '''again.
  
 
|-
 
|-
Line 390: Line 385:
 
|-
 
|-
 
| 08:19
 
| 08:19
|It is '''localhost '''''colon '''''8080 '''''slash '''''MyFirstProject '''''slash '''''GreetingServletPath '''
+
|It is '''localhost colon 8080 slash MyFirstProject slash GreetingServlet Path'''.
  
 
|-
 
|-
 
| 08:25
 
| 08:25
| Here we do not see the '''form data '''in the '''URL '''of the '''request.'''
+
| Here, we do not see the '''form data '''in the '''URL '''of the '''request.'''
  
 
|-
 
|-
 
| 08:30
 
| 08:30
| This is the major difference between '''doGet '''and '''doPost Methods.'''
+
| This is the major difference between '''doGet '''and '''doPost methods.'''
  
 
|-
 
|-
 
| 08:35
 
| 08:35
| Now, let us learn when to use '''GET '''and when to use '''POST Methods.'''
+
| Now, let us learn when to use '''GET '''and when to use '''POST methods.'''
  
 
|-
 
|-
 
| 08:42
 
| 08:42
|'''GET Method '''is used when:
+
|'''GET method '''is used when:
  
 
|-
 
|-
 
| 08:44
 
| 08:44
| the '''form '''is small and hence the '''data '''is less.
+
|the '''form '''is small and hence the '''data '''is less.
  
 
|-
 
|-
 
| 08:48
 
| 08:48
| the '''user''' wants the contents of the data to be visible in the '''URL.'''
+
|the '''user''' wants the contents of the data to be visible in the '''URL.'''
  
 
|-
 
|-
 
| 08:53
 
| 08:53
|'''POST Method '''is used when:
+
|'''POST method '''is used when:
  
 
|-
 
|-
 
| 08:55
 
| 08:55
| the '''form '''is large and hence the '''data '''is more.
+
|the '''form '''is large and hence the '''data '''is more.
  
 
|-
 
|-
 
| 09:00
 
| 09:00
| the '''user''' does not want the contents of the data to be visible in the '''URL.'''
+
|the '''user''' does not want the contents of the data to be visible in the '''URL.'''
  
 
|-
 
|-
Line 442: Line 437:
 
|-
 
|-
 
| 09:12
 
| 09:12
| create a simple login form using '''JSP'''
+
|create a '''simple login form''' using '''JSP'''
  
 
|-
 
|-
 
| 09:16
 
| 09:16
| Pass parameters using '''doGet''' '''method'''
+
|Pass parameters using '''doGet''' '''method'''
  
 
|-
 
|-
 
| 09:19
 
| 09:19
| Pass parameters using '''doPost method'''
+
|Pass parameters using '''doPost method'''
  
 
|-
 
|-
 
| 09:22
 
| 09:22
| Difference between''' doGet '''and '''doPost''' methods
+
|Difference between''' doGet '''and '''doPost''' methods.
  
 
|-
 
|-
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|-
 
|-
 
| 09:35
 
| 09:35
| It summarizes the Spoken Tutorial Project
+
| It summarizes the Spoken Tutorial Project.
  
 
|-
 
|-
 
| 09:38
 
| 09:38
|If you do not have good bandwidth you can download and watch it
+
|If you do not have good bandwidth, you can download and watch it.
  
 
|-
 
|-
 
|09:42
 
|09:42
| The Spoken Tutorial Project Team
+
| The Spoken Tutorial Project Team:
  
 
|-
 
|-
 
| 09:45
 
| 09:45
| Conducts workshops using spoken tutorials
+
| Conducts workshops using spoken tutorials.
  
 
|-
 
|-
 
| 09:48
 
| 09:48
| Gives certificates for those who pass an online test
+
| Gives certificates for those who pass an online test.
  
 
|-
 
|-
 
| 09:52
 
| 09:52
| For more details please write to contact at spoken hyphen tutorial dot org
+
| For more details please write to: contact at spoken hyphen tutorial dot org.
  
 
|-
 
|-
 
| 09:58
 
| 09:58
| Spoken Tutorial Project is a part of the Talk to a Teacher Project
+
| Spoken Tutorial Project is a part of the "Talk to a Teacher" Project.
  
 
|-
 
|-
 
| 10:02
 
| 10:02
| It is supported by the National Mission on Education through ICT, MHRD, Government of India
+
| It is supported by the National Mission on Education through ICT, MHRD, Government of India.
 
|-
 
|-
 
| 10:09
 
| 10:09
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|-
 
|-
 
| 10:19
 
| 10:19
| The Library Management System has been contributed by a leading software MNC, through their Corporate Social Responsibility Programme.
+
| The '''Library Management System''' has been contributed by a leading software MNC through their "Corporate Social Responsibility Programme".
  
 
|-
 
|-
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|-
 
|-
 
| 10:32
 
| 10:32
|This is Arya Ratish from IIT Bombay signing off.
+
|This is Arya Ratish from IIT Bombay, signing off. Thank you for joining.
 
+
 
+
Thank you for joining.
+
  
 
|}
 
|}

Latest revision as of 16:50, 9 March 2017

Time Narration
00:01 Welcome to the spoken-tutorial on Servlet Methods.
00:06 In this tutorial, we will learn to:
00:08 create a simple login form using JSP
00:13 Pass parameters using doGet method
00:16 Pass parameters using doPost method
00:20 Difference between doGet and doPost methods.
00:25 Here we are using:Ubuntu Version 12.04
00:30 Netbeans IDE 7.3
00:33 JDK 1.7
00:36 Firefox web-browser 21.0.
00:39 You can use any web-browser of your choice.
00:43 To follow this tutorial, you must know:
00:46 Core Java using Netbeans IDE
00:49 HTML
00:51 Basics of Java Servlets and JSPs.
00:56 If not, for relevant tutorials, please visit our website.
01:00 We will begin by creating our web application- the Library Management System.
01:06 First, we will create the Home page.
01:09 The Home page will contain a simple login form.
01:14 It will allow authenticated users to login to the Library Management System.
01:20 Now, let us switch to Netbeans IDE.
01:23 Let us go to the index dot jsp page that we had already modified earlier.
01:30 I have modified this page to create our home page.
01:35 We keep the title as Home Page.
01:38 Inside the body, we have a table with border equal to 1.
01:44 You can have a look at the code here.
01:47 Inside the table, we have included a heading Welcome to Library Management System.
01:54 Next, we have a paragraph tag that includes "This is the home page for Library Management System".
02:03 Then we have a hyperlink which links to a page called visitorHomePage dot jsp.
02:11 We will create this page later.
02:13 Next, we have a very simple login form.
02:18 This form allows a registered user to login .
02:22 Before creating the form , you will have to create a servlet named GreetingServlet.
02:28 So, pause the tutorial here and create a new servlet as explained in the earlier tutorial.
02:35 Note that the servlet name is GreetingServletand
02:39 the URL pattern should be GreetingServletPath.
02:44 This form has two input elements - Username and Password.
02:50 It also has a Submit button that says Sign In.
02:55 Next, we have a paragraph tag that includes a link to addUser.jsp.
03:03 This is the registration page for those users who have not yet registered.
03:09 Now, let us go to our GreetingServlet.java.
03:14 Note that GreetingServlet.java is created in the same package org.spokentutorial.
03:23 Now, this servlet will be able to access the form data from the request object.
03:30 This servlet will act as a controller.
03:33 Do you recall that we had come across controller earlier?
03:38 Now, we will see what the servlet does as a controller.
03:42 The form data will reside in the request object.
03:46 The first task is to retrieve the form data parameters.
03:51 This is done using the getParameter method on the request object.
03:57 So, let us switch to Netbeans IDE.
04:02 Type inside the doGet method:
04:04 PrintWriter space out equal to response dot getWriter().
04:14 Next, we will retrieve the form data parameters.
04:18 So that on the next line, type:
04:20 String space username equal to request dot getParameter within brackets and double quotes userName and semicolon.
04:35 Note that this userName is the name we have included in the form tag for User Name.
04:43 Similarly, we will retrieve the password also.
04:48 So, on the next line, type: String space password equal to request dot getParameter within brackets and double quotes password semicolon.
05:03 Next, we will print the UserName in the output.
05:08 So, on the next line, type:
05:10 out dot println within brackets and double quotes Hello from GET Method plus username.
05:21 Now, to run this project, right-click on MyFirstProject.
05:27 Click on Clean and Build.
05:29 Again right-click on MyFirstProject , click on Run.
05:35 So, the server is up and running.
05:38 It has deployed MyFirstProject.
05:41 We have got our Home page displayed in the browser.
05:45 Observe that the title of the page is Home Page.
05:50 We can see a very simple login form here.
05:54 Let me enter the Username and Password.
05:58 I will type arya as the Username.
06:02 And arya*123 as the Password.
06:06 Then click on Sign In.
06:09 We can see that we have got the output Hello from GET Method arya.
06:15 Now, the user was able to login here because we have not included any validation inside the code.
06:24 We will do this in the later tutorial.
06:28 Now, have a look at the URL here.
06:31 It is localhost colon 8080 slash MyFirstProject slash GreetingServletPath question mark userName equal to arya and password equal to arya *123.
06:49 Now, the form data is separated from the page information by a question mark.
06:56 We can see that the username and password that we had entered in the form are inside the URL also.
07:05 Now let us try to do the same, using POST Method.
07:10 So, switch back to the IDE.
07:12 Copy the code we had written for doGet method and paste in the doPost method.
07:20 Now, change the println statement to Hello from POST Method.
07:27 Now, let us open index dot jsp.
07:31 Here, we must change the method attribute of the form tag to POST.
07:37 You can have a look at this code now.
07:42 We have form action equal to GreetingServletPath method equal to POST.
07:49 Now, we will run this Project again.
07:53 So, right-click on MyFirstProject and click on Run.
07:58 We have got the output similar to the one we got when we used the GET method.
08:04 So, let us type UserName and Password again.
08:08 Then click on Sign In.
08:12 Note that we have got Hello from POST Method arya.
08:17 Now, take a look at the URL.
08:19 It is localhost colon 8080 slash MyFirstProject slash GreetingServlet Path.
08:25 Here, we do not see the form data in the URL of the request.
08:30 This is the major difference between doGet and doPost methods.
08:35 Now, let us learn when to use GET and when to use POST methods.
08:42 GET method is used when:
08:44 the form is small and hence the data is less.
08:48 the user wants the contents of the data to be visible in the URL.
08:53 POST method is used when:
08:55 the form is large and hence the data is more.
09:00 the user does not want the contents of the data to be visible in the URL.
09:06 ex: passwords
09:08 Let us summarize.
09:10 In this tutorial we have learnt to:
09:12 create a simple login form using JSP
09:16 Pass parameters using doGet method
09:19 Pass parameters using doPost method
09:22 Difference between doGet and doPost methods.
09:26 Please make sure that you have completed this tutorial before proceeding further.
09:32 Watch the video available at the following link.
09:35 It summarizes the Spoken Tutorial Project.
09:38 If you do not have good bandwidth, you can download and watch it.
09:42 The Spoken Tutorial Project Team:
09:45 Conducts workshops using spoken tutorials.
09:48 Gives certificates for those who pass an online test.
09:52 For more details please write to: contact at spoken hyphen tutorial dot org.
09:58 Spoken Tutorial Project is a part of the "Talk to a Teacher" Project.
10:02 It is supported by the National Mission on Education through ICT, MHRD, Government of India.
10:09 More information on this mission is available at http://spoken-tutorial.org/NMEICT-Intro
10:19 The Library Management System has been contributed by a leading software MNC through their "Corporate Social Responsibility Programme".
10:28 They have also validated the content for this spoken tutorial.
10:32 This is Arya Ratish from IIT Bombay, signing off. Thank you for joining.

Contributors and Content Editors

PoojaMoolya, Pratik kamble, Sandhya.np14