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Java EE 7 Development with NetBeans 8
Java EE 7 Development with NetBeans 8

Java EE 7 Development with NetBeans 8: Develop professional enterprise Java EE applications quickly and easily with this popular IDE , Third Edition

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Java EE 7 Development with NetBeans 8

Chapter 2. Developing Web Applications Using JavaServer Faces 2.2

JavaServer Faces is the standard Java EE framework for building web applications. In this chapter, we will see how using JSF can simplify web application development.

The following topics will be covered in this chapter:

  • Creating a JSF project with NetBeans
  • Laying out JSF tags by taking advantage of the JSF <h:panelGrid> tag
  • Using static and dynamic navigation to define navigation between pages
  • Developing CDI named beans to encapsulate data and application logic
  • Implementing custom JSF validators
  • How to easily generate JSF 2.2 templates via NetBeans wizards
  • How to easily create JSF 2.2 composite components with NetBeans

Introduction to JavaServer Faces

Before JSF existed, most Java web applications were typically developed using nonstandard (as in, not part of the Java EE specification) web application frameworks such as Apache Struts, Tapestry, and Spring Web MVC, among others. These frameworks are built on top of the Servlet and JSP standards and automate a lot of functionality that needs to be manually coded when using these APIs directly.

Having a wide variety of web application frameworks available often resulted in analysis paralysis, that is, developers often spent an inordinate amount of time evaluating frameworks for their applications.

The introduction of JSF to the Java EE specification resulted in a standard, very capable web application framework available in any Java EE-compliant application server. With JSF being the standard Java EE framework, nowadays many Java enterprise application developers choose to use JSF to develop their user interface.

Developing our first JSF application

From an application developer's point of view, a JSF application consists of a series of XHTML pages that contain custom JSF tags, one or more CDI named beans, and an optional configuration file named faces-config.xml.

Note

The faces-config.xml file was required in JSF 1.x; however, in JSF 2.0, some conventions were introduced to reduce the need for configuration. Additionally, a number of JSF configurations can be specified using annotations, reducing and, in some cases, eliminating the need for this XML configuration file.

Previous versions of JSF required JSF managed beans to implement server-side functionalities. For backward compatibility, JSF managed beans are still supported; however, CDI named beans are preferred in modern JSF applications.

Creating a new JSF project

To create a new JSF project, we need to go to File | New Project, select the Java Web project category, and select Web Application as the project type.

After clicking on Next, we...

Facelets templating

One advantage that Facelets has over JSP is its templating mechanism. Templates allow us to specify page layout in one place. Then, we can have template clients that use the layout defined in the template. Since most web applications have consistent layout across pages, using templates makes our applications much more maintainable because changes to the layout need to be made in a single place. If at one point we need to change the layout for our pages (for example, add a footer or move a column from the left side of the page to the right side of the page), we only need to change the template and the change is reflected in all the template clients.

Adding the Facelets template

We can add a Facelets template to our project simply by going to File | New File, selecting the JavaServer Faces category, and selecting the Facelets Template file type.

NetBeans provides very good support for Facelets templating. It provides several templates "out of the box" using common...

Resource library contracts

Resource library contracts is a new JSF 2.2 feature. It builds on Facelets templates to allow us to build "themable" web applications. For example, we could have an application with multiple customers or we could render the application user interface so that each user sees their own company's logo after logging in. Alternatively, we could have the user select from a predefined set of themes, which is exactly what we are going to do in our next example.

We can create a resource library contract by going to File | New and selecting JSF Resource Library Contract from the JavaServer Faces category in the New File wizard.

Resource library contracts

We need to give our resource library contract a name by entering a value into the Contract Name input field. We can optionally allow NetBeans to generate the initial templates for our resource library contract.

Resource library contracts

In our example, we are going to have NetBeans generate the initial template and then we'll modify the CSS a bit so that the...

Composite components

A very nice JSF feature is the ability to easily write custom JSF components. With JSF 2, creating a custom component involves little more than creating the markup for it, without any Java code or configuration. Since custom components are typically composed of other JSF components, they are referred to as composite components.

We can generate a composite component by going to File | New File, selecting the JavaServer Faces category, and selecting the JSF Composite Component file type.

Composite components

After clicking on Next, we can specify the filename, project, and folder for our custom component.

Composite components

Note

To take advantage of JSF 2.0's automatic resource handling and conventions, it's not recommended to change the folder where our custom component will be placed.

When we click on Finish, NetBeans generates an empty composite component we can use as a base to create our own:

<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD...

Introduction to JavaServer Faces


Before JSF existed, most Java web applications were typically developed using nonstandard (as in, not part of the Java EE specification) web application frameworks such as Apache Struts, Tapestry, and Spring Web MVC, among others. These frameworks are built on top of the Servlet and JSP standards and automate a lot of functionality that needs to be manually coded when using these APIs directly.

Having a wide variety of web application frameworks available often resulted in analysis paralysis, that is, developers often spent an inordinate amount of time evaluating frameworks for their applications.

The introduction of JSF to the Java EE specification resulted in a standard, very capable web application framework available in any Java EE-compliant application server. With JSF being the standard Java EE framework, nowadays many Java enterprise application developers choose to use JSF to develop their user interface.

Developing our first JSF application


From an application developer's point of view, a JSF application consists of a series of XHTML pages that contain custom JSF tags, one or more CDI named beans, and an optional configuration file named faces-config.xml.

Note

The faces-config.xml file was required in JSF 1.x; however, in JSF 2.0, some conventions were introduced to reduce the need for configuration. Additionally, a number of JSF configurations can be specified using annotations, reducing and, in some cases, eliminating the need for this XML configuration file.

Previous versions of JSF required JSF managed beans to implement server-side functionalities. For backward compatibility, JSF managed beans are still supported; however, CDI named beans are preferred in modern JSF applications.

Creating a new JSF project

To create a new JSF project, we need to go to File | New Project, select the Java Web project category, and select Web Application as the project type.

After clicking on Next, we need to...

Facelets templating


One advantage that Facelets has over JSP is its templating mechanism. Templates allow us to specify page layout in one place. Then, we can have template clients that use the layout defined in the template. Since most web applications have consistent layout across pages, using templates makes our applications much more maintainable because changes to the layout need to be made in a single place. If at one point we need to change the layout for our pages (for example, add a footer or move a column from the left side of the page to the right side of the page), we only need to change the template and the change is reflected in all the template clients.

Adding the Facelets template

We can add a Facelets template to our project simply by going to File | New File, selecting the JavaServer Faces category, and selecting the Facelets Template file type.

NetBeans provides very good support for Facelets templating. It provides several templates "out of the box" using common web page...

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Description

The book is aimed at Java developers who wish to develop Java EE applications while taking advantage of NetBeans functionality to automate repetitive tasks. Familiarity with NetBeans or Java EE is not assumed.

Who is this book for?

The book is aimed at Java developers who wish to develop Java EE applications while taking advantage of NetBeans functionality to automate repetitive tasks. Familiarity with NetBeans or Java EE is not assumed.
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Publication date : Jan 31, 2015
Length: 364 pages
Edition : 3rd
Language : English
ISBN-13 : 9781783983520
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Table of Contents

12 Chapters
1. Getting Started with NetBeans Chevron down icon Chevron up icon
2. Developing Web Applications Using JavaServer Faces 2.2 Chevron down icon Chevron up icon
3. JSF Component Libraries Chevron down icon Chevron up icon
4. Interacting with Databases through the Java Persistence API Chevron down icon Chevron up icon
5. Implementing the Business Tier with Session Beans Chevron down icon Chevron up icon
6. Contexts and Dependency Injection Chevron down icon Chevron up icon
7. Messaging with JMS and Message-driven Beans Chevron down icon Chevron up icon
8. Java API for JSON Processing Chevron down icon Chevron up icon
9. Java API for WebSocket Chevron down icon Chevron up icon
10. RESTful Web Services with JAX-RS Chevron down icon Chevron up icon
11. SOAP Web Services with JAX-WS Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Half star icon 4.8
(5 Ratings)
5 star 80%
4 star 20%
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1 star 0%
Yusuf Sep 20, 2016
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Java EE7 meet the criteria I was looking for
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Nwokoma O Sampson Sep 13, 2015
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This is one of the best well written technical books I ever purchased, and I am glad I did! It is helping me to learn new technologies while mastering Netbeans. I highly recommend it!
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Jesus S. Dec 11, 2017
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Me gusto mucho como esta distribuido, como maneja los conceptos pero sobre todo como te lleva de la mano para comenzar a programar en estos lenguajes.
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RAJ Feb 21, 2019
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Good Product
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Bom dia !O conteúdo é bom demais. Acontece que estou com dificuldades para instalar o software no tablete. No notebook está correto.Grato.
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