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

Providing a hibernate configuration using the properties file

This is another way to configure hibernate; here, we will create a file with the .properties extension. Usually called, this file is a replacement for hibernate.cfg.xml. You can use any approach (either cfg.xml or the properties file). However, the properties file is better for startup, and it is the easiest approach to get started quickly.

This is a simpler representation of an XML file. Hibernate searches for the XML file or the properties file at startup to find the configuration in your classpath. We can use any one of these options. You can use both of them at the same time, but this is uncommon because hibernate gives priority to the XML file over properties; the properties file is simply ignored in such cases.


The properties file looks similar to a normal text file, but the content should be in a key/value pair, which is Key=Value.

Here is an example: hibernate.connection.driver_class=com.mysql.jdbc.Driver.

How to do it…

Now, we will create a file called in our classpath and write the following properties in the file. The following code represents hibernate.cfg.xml in the file:


How it works…

When we create an instance of the Configuration class, it will look for hibernate.cfg.xml or in our classpath. If we use a .properties file, it'll get all of the property defined in the file, rather than create a Configuration object.


The difference between an XML and properties file is that, in an XML file, you can directly map classes using the <Mapping> tag, but there is no way to configure it in a properties file. So, you can use this methodology when you use a programmatic configuration.