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Java EE 5 Development with NetBeans 6
Java EE 5 Development with NetBeans 6

Java EE 5 Development with NetBeans 6: Develop professional enterprise Java EE applications quickly and easily with this popular IDE

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Java EE 5 Development with NetBeans 6

Chapter 2. Developing Web Applications with Servlets and JSPs

In this chapter we will be covering how to develop Java EE web applications taking advantage of the Servlet API. We will also see how to develop Java Server Pages (JSPs) to better separate application business logic from presentation. Some of the topics covered in this chapter include:

  • Developing JSPs for display of dynamic web content

  • Developing servlets for server side processing of Java web applications

  • Securing web applications

  • Extracting common markup into JSP fragments

  • Using NetBeans HTTP monitor to examine application behavior

Creating Our First Web Application

NetBeans provides a Web category for web applications. To create a new web application, we need to click on File | New Project (or press Ctrl+Shift+N simultaneously) to create a new project, then select Web as the project category, and Web Application.

We then need to select a project name for our project. As we type the name for our project, the project location, project...

Creating Our First Web Application


NetBeans provides a Web category for web applications. To create a new web application, we need to click on File | New Project (or press Ctrl+Shift+N simultaneously) to create a new project, then select Web as the project category, and Web Application.

We then need to select a project name for our project. As we type the name for our project, the project location, project folder, and context path are updated automatically. Although we can override default values for these fields if we wish, it is always a good idea to use them since this makes our projects more maintainable (since developers familiar with NetBeans defaults will know the values for these fields without having to look them up).

Clicking on the Next> button takes us to the next page in the New Web Application wizard.

At this stage in the wizard we select what server our application will be deployed to, as well as the Java EE version to use and the context path (the "root" URL) for our...

Servlet Development


Although the application developed in the previous section was fairly easy to develop, the resulting code isn't very maintainable. One of the JSPs has both business logic and presentation logic embedded in it. It is considered a best practice for JSPs to have only presentation logic, and keep the business logic elsewhere.

One common way to approach this problem is to use the Model-View-Controller (MVC) design pattern. This pattern provides a clean separation of concerns, providing artifacts that solely act as data (model), while other artifacts are solely responsible for displaying the data (view) and another artifact (or artifacts) is responsible for manipulating the data and transferring control to the view (controller). In Java web applications, JSPs typically act as the view, servlets act as controllers, and custom JavaBeans act as the model.

In this section we will modify the application we developed previously so that it follows this pattern.

Adding a Servlet to...

Securing Web Applications


It is a common requirement to only allow certain users to access certain pages in a web application. Before a web application can be secured, a security realm needs to be set up in the application server where the application will be deployed. Security realms are essentially collections of users and security groups.

Each security realm allows the application server to obtain security information from some sort of permanent storage. This security information could be stored in a simple flat file, a relational database, an LDAP repository, or any other kind of persistent storage. Configuring the application server to obtain the security information from any kind of persistent storage allows us as application developers not to have to worry about the specific implementation. We simply configure our application to use a defined security realm for authentication.

Each user can belong to one or more security groups. Secured pages in a web application are only accessible...

JSP Fragments


In a typical web application, most pages share certain common areas such as a navigation menu, a header, footer, and so forth. Since these areas must be identical across pages, maintaining them can be a tedious process since every change in one of these areas must be done in each and every page in the application. To avoid this situation in Java web applications, we can create JSP fragments that can be included in every page. This way if we need to make a change, we only need to do it in the JSP fragment.

In the previous section, we created a login form on both the login.jsp and loginerror.jsp pages. If we wish to change the look of this login form, we would have to do it twice, once in each page. This form is a perfect candidate to be extracted to a JSP fragment.

Creating a JSP Fragment in NetBeans

To create a JSP fragment in NetBeans, we simply need to go to File | New, select Web as the category, then JSP as the file type. We then fill out all the information in the New...

Monitoring Web Applications with NetBeans HTTP Monitor


When deploying any application by right-clicking on the project and selecting Run, the HTTP monitor pops up at the bottom of the NetBeans main window.

The HTTP monitor allows us to easily see request parameters and attributes, as well as cookies, session attributes, context (application) attributes, information about the client (browser) and server, as well as request headers.

Expanding the node labeled Current Records on the left pane of the HTTP monitor, then clicking on one of its child nodes, results in the right pane displaying information about the selected record.

At a glance we can see a lot of information such as the request URI, HTTP method, query string, etc. Notice that we can see an object stored as a request attribute. This request attribute is set behind the scenes by GlassFish, which is the application server we are using to deploy our application.

Notice that now we can see some additional information, the name and values...

Summary


In this chapter we covered how to develop JSPs to display both static and dynamic content in a web browser. We also saw how to implement the Model-View-Controller design pattern by using JavaBeans as the model component, JSPs as the view, and servlets as controllers. Additionally, we learned how to secure web applications via form based authentication. We also covered how to extract common markup across pages into a single JSP fragment, easing maintenance of web applications. Finally, we saw how the NetBeans HTTP monitor allows us to easily keep track of what is happening to our web application, by allowing us to easily see request, session, and application attributes, request parameters, HTTP headers, and so forth.

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What you will learn

  • Develop Java web applications by leveraging NetBeans functionality Build standard JSF applications by taking advantage of NetBeans features Integrate NetBeans with third-party RDBMS Develop JavaServer Pages (JSPs) to display both static and dynamic content in a web browser Visually develop aesthetically pleasing JSF web applications with the NetBeans Visual Web designer Quickly and easily develop applications taking advantage of the Java Persistence API Implement the Model-View-Controller design pattern by using JavaBeans as the model component Take advantage of NetBeans functionality to easily develop Enterprise JavaBeans, including configuring transaction management via annotations Use static and dynamic navigation to define navigation between pages Utilize NetBeans to easily add messaging functionality to enterprise applications, through the Java Messaging Service API and through messag-driven EJBs Develop web services using NetBeans, including exposing EJB functionality as web services
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Last updated date : Feb 11, 2025
Publication date : Oct 31, 2008
Length: 400 pages
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Language : English
ISBN-13 : 9781847195463
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ISBN-13 : 9781847195463
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Table of Contents

10 Chapters
Getting Started with NetBeans Chevron down icon Chevron up icon
Developing Web Applications with Servlets and JSPs Chevron down icon Chevron up icon
Enhancing JSP Functionality with JSTL and Custom Tags Chevron down icon Chevron up icon
Developing Web Applications using JavaServer Faces Chevron down icon Chevron up icon
Interacting with Databases through the Java Persistence API Chevron down icon Chevron up icon
Visual Web JSF Development Chevron down icon Chevron up icon
Implementing the Business Tier with Session Beans Chevron down icon Chevron up icon
Messaging with JMS and Message Driven Beans Chevron down icon Chevron up icon
Web Services Chevron down icon Chevron up icon
Putting it all Together Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
(5 Ratings)
5 star 60%
4 star 20%
3 star 0%
2 star 0%
1 star 20%
Alejandro Apr 03, 2017
Full star icon Full star icon Full star icon Full star icon Full star icon 5
For the price paid I was expecting a book in such a worse condition. Nice surprise.
Amazon Verified review Amazon
W. Prakash Jan 07, 2009
Full star icon Full star icon Full star icon Full star icon Full star icon 5
I've been developing Netbeans plugin for Java EE development for the past eight years, and have knowledge of most part of the tools. When approached for help by Netbeans users, they were either guided to sparse documents in the Netbeans Knowledge base or a blog was written for their benefit. I wished for an one stop book, which I could point Netbeans users to. I'm glad to see that David Heffelfinger has written a book similar to what I wished for and published by Packt Publishing.The book is written to help Java developers who want to learn Java EE, as well as seasoned Java EE developers who would want to use an IDE for their development. Since Netbeans is an ideal tool for Java EE 5 development, the book explains how to develop end to end Java EE application using Netbeans IDE. Netbeans has numerous Java EE development support tools to develop a full-fledged Java EE application fairly easily. This book is not to teach you all the principles of Java EE, but to put all the Java EE related Netbeans tools into perspective so that a novice user can easily navigate through the maze of tools offered by Netbeans to develop a Java EE application from scratch.Over all Java EE 5 Development With Netbeans 6 is a good read. With lots of visual aids, the concepts are well explained. Though this book is not a dedicated book for learning Java EE technology, Java EE concepts are clearly explained where ever needed, which makes it an easy read for non Java EE developers. This book has enough information for a novice user to write an end-to-end Java EE application including the front end, back end, business logic, deployment and testing, although it does not cover all the Java EE technologies supported by Netbeans.A pleasant and useful book to read.
Amazon Verified review Amazon
Gregory R. Keyock Nov 21, 2016
Full star icon Full star icon Full star icon Full star icon Full star icon 5
100% Satisfied. Delivered on time. As advertised.
Amazon Verified review Amazon
Jimm Grogan Feb 24, 2009
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
This was a much needed book for me. I am a newbie with enterprise concepts in general. It helped me learn Java Server Pages, Java Server Faces, Enterprise Java Beans and other beans, interfacing the database, and various other details for working with Java 5 EE and Netbeans. It is one of the few precious resources available on its combined topic. I was especially happy that it included how to integrate Java client side applications with your enterprise server application.This book was focused on Netbeans 6.1, and mentioned the menu paths and options for that during the tutorials. You had to figure out on your own how to do some details on Netbeans 6.5. Netbeans itself still has some bugs to further complicate some things.I felt this book was too focused on the details and procedures of building it's particular tutorial examples. It may be a matter of preference, but I would of liked some more attention on the overview and philosophical concepts. I started having trouble keeping straight the general role or purpose of all the different EE features, and why they were invented. An organizational chart of how the different EE concepts or features fit together would of been a nice reference.
Amazon Verified review Amazon
java ee learner Aug 03, 2010
Full star icon Empty star icon Empty star icon Empty star icon Empty star icon 1
This is a very poorly written book. I tried to follow the examples, but the author eliminates code and other critical steps and make me guess what to do. I end up ditching this book for online manual. Don't waste your money on an out of date, incomplete, and user unfriendly book.
Amazon Verified review Amazon
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