Difference between revisions of "Java-Business-Application/C2/Creating-a-Java-web-project/English-timed"
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| − | | how the '''web server''' uses them to serve web requests. | + | | how the '''web server''' uses them to serve web '''requests'''. |
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| − | | You can see the '''source | + | | You can see the '''source-code''' now. |
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| − | | This '''Glassfish Server''' '''instance''' may have many '''applications''' | + | | This '''Glassfish Server''' '''instance''' may have many '''applications''' '''run'''ning on it. |
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| − | | To access a particular '''application''', type that application name in the '''URL'''. | + | | To access a particular '''application''', type that application-name in the '''URL'''. |
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Revision as of 17:36, 3 August 2015
| Time | Narration |
| 00:00 | Welcome to the spoken-tutorial on Creating a Java web project. |
| 00:06 | In this tutorial, we will learn: |
| 00:09 | * to create a Java Web Project |
| 00:12 | * About Deployment Descriptor |
| 00:15 | * About web.xml file. |
| 00:19 | Here we are using: |
| 00:20 | * Ubuntu version 12.04 |
| 00:23 | * Netbeans IDE 7.3 |
| 00:26 | * JDK 1.7 |
| 00:28 | * Firefox web-browser 21.0 |
| 00:32 | You can use any web-browser of your choice. |
| 00:35 | To follow this tutorial, you must have knowledge of: |
| 00:39 | Core Java using Netbeans IDE and |
| 00:42 | HTML. |
| 00:44 | If not, for relevant tutorials please visit our website. |
| 00:50 | Now, let us see how to create a simple Java web project using NetBeans IDE. |
| 00:56 | For this, we will switch to NetBeans IDE. |
| 01:01 | On the top left corner of the IDE, click on File and click on New Project. |
| 01:08 | A New Project window opens up. |
| 01:12 | From the Categories, choose Java Web and from the Projects choose Web Application. |
| 01:18 | Then click on Next. |
| 01:20 | On the next window that opens, |
| 01:23 | type the Project Name as MyFirstProject. |
| 01:27 | Leave the Project location and Project Folder as it is. |
| 01:31 | Then, click on Next. |
| 01:35 | Select GlassFish Server as the Server. |
| 01:39 | Note that Context Path here is MyFirstProject, this is the same name as our Project. |
| 01:47 | We will learn about this in detail. |
| 01:50 | Now, click on Next and then click on Finish. |
| 01:55 | Click on the Projects tab. |
| 01:58 | We can see, there are several nodes here and a web application named My First Project has been created. |
| 02:08 | Now, we are not concerned about all of these nodes right now. |
| 02:11 | But let me click and show you, what it contains. |
| 02:16 | Now, let us learn about what is known as Deployment Descriptor. |
| 02:21 | A web application’s deployment descriptor describes |
| 02:25 | the classes, resources and configuration of the application and |
| 02:31 | how the web server uses them to serve web requests. |
| 02:37 | The web server receives a request for the application. |
| 02:42 | It uses deployment descriptor to map the URL of the request. |
| 02:48 | It maps the URL to the code that has to handle the request. |
| 02:52 | The deployment descriptor is a file named web.xml. |
| 02:57 | Now, let us come back to the IDE. |
| 03:00 | We are not able to find the web.xml file from the nodes available here. |
| 03:07 | To locate it, at the top left of the IDE, click on File and then click on New File. |
| 03:16 | From the Categories, choose Web. |
| 03:19 | And from the File Types, choose Standard Deployment Descriptor (web.xml). |
| 03:25 | Then click on Next |
| 03:27 | and click on Finish. |
| 03:30 | Click on the Files tab on the left hand side of the IDE. |
| 03:34 | Note that web.xml is visible under the WEB-INF folder of the 'Web' node. |
| 03:42 | You can see the source-code now. |
| 03:46 | We have an xml header here. |
| 03:50 | We also have a web-app node. |
| 03:53 | Now, we shall try running the application. |
| 03:57 | To do so, right click on MyFirstProject. |
| 04:02 | Click on Clean and Build. |
| 04:04 | This will delete any previously compiled files and other build outputs. |
| 04:10 | It will also recompile the application. |
| 04:14 | Again, right click on MyFirstProject and then click on Run. |
| 04:20 | So, the server is up and running and it has deployed My first Project. |
| 04:27 | A browser window opens up and displays Hello World . |
| 04:32 | This is because when we run the project, the web application renders the page shown. |
| 04:39 | Now, let’s have a look at the URL here that rendered the page. |
| 04:44 | It is localhost colon 8080 slash MyFirstProject. |
| 04:49 | So, when we run MyFirstProject, by default we get a JSP page that says HelloWorld! |
| 04:57 | Now, let us come back to our IDE. |
| 05:00 | We can see that under the WEB-INF folder, there is index.jsp. |
| 05:07 | Double click on index.jsp. |
| 05:10 | We can see the source code here. |
| 05:12 | It is a simple JSP page with HTML tags only. |
| 05:17 | It has the title "JSP Page" and it has the heading "Hello World". |
| 05:24 | The server provides index.jsp by default when we run the web application. |
| 05:30 | Recall that we had come across something called ContextPath earlier. |
| 05:36 | We had set the ContextPath as MyFirstProject itself. |
| 05:41 | Now, come back to the browser. |
| 05:44 | Type the URL as localhost colon 8080 and press Enter. |
| 05:50 | We see the Home page of Glassfish Server is displayed. |
| 05:56 | Here, 8080 is the default port at which the server runs on the machine. |
| 06:01 | This Glassfish Server instance may have many applications running on it. |
| 06:08 | To access a particular application, type that application-name in the URL. |
| 06:15 | So, we must type the specific application that has been deployed on that instance. |
| 06:21 | So, we will type slash MyFirstProject . |
| 06:26 | And press Enter. |
| 06:27 | So, we see Hello World! displayed. |
| 06:31 | Let us summarize. |
| 06:32 | In this tutorial we have learnt: |
| 06:35 | * To create a simple Java Web project |
| 06:38 | * Execute the web project |
| 06:41 | * and about the web.xml file. |
| 06:44 | To know more about this spoken tutorial project, |
| 06:46 | watch the video available at the following link. |
| 06:50 | It summarizes the Spoken Tutorial project. |
| 06:54 | If you do not have good bandwidth, you can download and watch it. |
| 06:58 | The Spoken Tutorial Project Team: |
| 07:00 | * Conducts workshops using spoken tutorials. |
| 07:04 | * Gives certificates for those who pass an online test. |
| 07:07 | For more details, please write to: contact at spoken hyphen tutorial dot org. |
| 07:13 | Spoken Tutorial Project is a part of the "Talk to a Teacher" project. |
| 07:17 | It is supported by the National Mission on Education through ICT, MHRD, Government of India. |
| 07:23 | More information on this mission is available at- |
| 07:27 | http://spoken-tutorial.org/NMEICT- Intro |
| 07:34 | The Library Management System has been contributed by a leading software MNC, through their Corporate Social Responsibility program. |
| 07:44 | They have also validated the content for this spoken tutorial. |
| 07:48 | This is Arya Ratish from IIT Bombay, signing off.
Thank you for joining. |
