Book Image

Digital Java EE 7 Web Application Development

By : Peter Pilgrim
Book Image

Digital Java EE 7 Web Application Development

By: Peter Pilgrim

Overview of this book

Digital Java EE 7 presents you with an opportunity to master writing great enterprise web software using the Java EE 7 platform with the modern approach to digital service standards. You will first learn about the lifecycle and phases of JavaServer Faces, become completely proficient with different validation models and schemes, and then find out exactly how to apply AJAX validations and requests. Next, you will touch base with JSF in order to understand how relevant CDI scopes work. Later, you’ll discover how to add finesse and pizzazz to your digital work in order to improve the design of your e-commerce application. Finally, you will deep dive into AngularJS development in order to keep pace with other popular choices, such as Backbone and Ember JS. By the end of this thorough guide, you’ll have polished your skills on the Digital Java EE 7 platform and be able to creat exiting web application.
Table of Contents (21 chapters)
Digital Java EE 7 Web Application Development
About the Author
About the Reviewers

Chapter 4. JSF Validation and AJAX


"It always seems impossible until it is done."

 --Nelson Mandela

So far, we have created a digital customer journey that accomplishes the common create, retrieve, update, and delete, that is, the famous CRUD requirement. The results are attractive to the stakeholder and to the product owner, but the user members of our team are not satisfied with the form, because it lacks the ability to verify the data entries made by members of the general public.

When we think about it, validation is important for the user as he or she is the one entering the data in a web application. It saves time and frustration for the user, because they know that the entry is wrong as they enter the data. It avoids the costs incurred for fixing of the wrongly submitted data by the database administrator. Validation improves the efficiency of a web application that works 24/7 over the Internet. As more of our daily lives get dependent on the digital adaptation of traditional services...