Book Image

Java EE 8 Development with Eclipse - Third Edition

By : Ram Kulkarni
Book Image

Java EE 8 Development with Eclipse - Third Edition

By: Ram Kulkarni

Overview of this book

Java EE is one of the most popular tools for enterprise application design and development. With recent changes to Java EE 8 specifications, Java EE application development has become a lot simpler with the new specifications, some of which compete with the existing specifications. This guide provides a complete overview of developing highly performant, robust and secure enterprise applications with Java EE with Eclipse. The book begins by exploring different Java EE technologies and how to use them (JSP, JSF, JPA, JDBC, EJB, and more), along with suitable technologies for different scenarios. You will learn how to set up the development environment for Java EE applications and understand Java EE specifications in detail, with an emphasis on examples. The book takes you through deployment of an application in Tomcat, GlassFish Servers, and also in the cloud. It goes beyond the basics and covers topics like debugging, testing, deployment, and securing your Java EE applications. You'll also get to know techniques to develop cloud-ready microservices in Java EE.
Table of Contents (20 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Free Chapter
1
Introducing JEE and Eclipse
Index

JAXB


JAXB provides an easy way to convert XML or JSON representations of data into Java objects and vice versa. Using simple annotations, you can have a JAXB implementation create XML or JSON data from a Java object or create a Java object from XML or JSON.

Note

To understand how Java data types are mapped to XML schema types in JAXB, refer to https://docs.oracle.com/javase/tutorial/jaxb/intro/bind.html.

The following are a few important JAXB annotations:

  • @XmlRootElement: This annotation specifies the root element of the XML document and is typically used at the class level.
  • @XmlElement: This annotation specifies an XML element that is not a root element. Java class members can be marked as XMLElement when the class is annotated with @XmlRootElement.
  • @XmlAttribute: This annotation marks a member of the Java class as an attribute of the parent XML element.
  • @XmlAccessorType: This annotation is specified at the class level. It lets you control how class fields are serialized to XML or JSON. Valid...