Book Image

Java Hibernate Cookbook

By : Yogesh Prajapati, Vishal Ranapariya
Book Image

Java Hibernate Cookbook

By: Yogesh Prajapati, Vishal Ranapariya

Overview of this book

This book will provide a useful hands-on guide to Hibernate to accomplish the development of a real-time Hibernate application. We will start with the basics of Hibernate, which include setting up Hibernate – the pre-requisites and multiple ways of configuring Hibernate using Java. We will then dive deep into the fundamentals of Hibernate such as SessionFactory, session, criteria, working with objects and criteria. This will help a developer have a better understanding of how Hibernate works and what needs to be done to run a Hibernate application. Moving on, we will learn how to work with annotations, associations and collections. In the final chapters, we will see explore querying, advanced Hibernate concepts and integration with other frameworks.
Table of Contents (15 chapters)
Java Hibernate Cookbook
About the Authors
About the Reviewers

Persisting Set

Set provides an unordered data structure, and duplicate elements are not allowed. Some classes implemented by the Set interface are java.util.HashSet, java.util.LinkedHashSet, and so on. For this recipe, we will use the java.util.HashSet class, which implements the java.util.Set interface. The only difference between List and Set is that Set doesn't allow duplicate values. For example, in our previous example, we added the e-mail address with [email protected] twice, and hibernate will allow us to do this. But in case of Set, you cannot add a duplicate value. Let's take a look at how to achieve this.

Getting ready

Now, we need the class to persist Set in hibernate. Use the next code snippet to create the Employee class.

Creating a class

Use the following code to create the classes:

Source file:

@Table(name = "employee")
public class Employee {

  @Column(name = "id")
  private long id;

  @Column(name = "name")