Java Hibernate Cookbook

Java Hibernate Cookbook

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.

Java Hibernate Cookbook

Credits

About the Authors

About the Reviewers

www.PacktPub.com

Preface

Free Chapter

Setting Up Hibernate

Introduction

Getting the required libraries for hibernate

Creating a hibernate persistent class

Providing an XML-based hibernate mapping

Providing an annotation-based hibernate mapping

Providing a hibernate configuration using an XML file

Providing a hibernate configuration using the properties file

Configuring hibernate programmatically

Understanding the Fundamentals

Introduction

Building a SessionFactory

Creating a generic SessionFactory provider class

Opening a new session

Opening a stateless session

Saving an object to the database

Fetching an object from the database

Removing an object from the database

Updating an object

Creating a criteria

Restricting the results using a criteria

Pagination using a criteria

Sorting the results

Transforming a result

Using basic projection

Basic Annotations

Introduction

Declaring a class as an entity and creating a table in the database – @Entity and @Table

Creating a column in the table – @Column

Creating a primary key and composite primary key column – @Id and @IdClass

Creating an autogenerator column

Working with Collections

Working with Associations

Introduction

One-to-one mapping using foreign key association

One-to-one mapping using a common join table

One-to-one mapping using a common primary key

One-to-many mapping or many-to-one mapping

Many-to-many mapping

Querying

Introduction

Working with an alias

Performing aggregate operations

Executing a subquery using a criteria

Executing a native SQL query

Executing a query using HQL

Using formula in hibernate

Working with NamedQuery

Advanced Concepts

Introduction

Working with a first-level cache

Working with a second-level cache

Working with a query cache

Working with the table per class hierarchy strategy of inheritance

Working with the table per subclass strategy of inheritance

Working with the table per concrete class strategy of inheritance

Working with the versioning of objects

Maintaining the history of an object

Working with an interceptor

Working with batch processing

Integration with Other Frameworks

Introduction

Integration with Spring

Integration with Struts

Index

Customer Reviews

5 star

4 star

3 star

2 star

1 star

Getting the required libraries for hibernate

To work with hibernate, we need a JAR (Java Archive) file provided by hibernate. Here, we will see how to download the hibernate core distribution. There are multiple ways to get the required libraries; here, we will consider two of them:

Manually downloading
Using Maven

Manually downloading

The first and most basic JAR file needed is a JDBC driver. The JDBC driver is a bridge or an API between Java and the database. The JDBC driver provides us with the generic classes that will help us communicate with the database. Generally, the driver is either provided by the database provider or developed by communities; however, you have to get it yourself. This also depends on the type of the database you are using. As we will use the MySQL database for this book, we will use the Mysql-Connector.jar file.

How to do it…

Let's come back to the library section. Apart from JDBC, you will need the JAR files for hibernate. Perform the following steps:

Download the hibernate core distribution from http://hibernate.org/orm/.
Now, place all the files in your classpath if you plan to run a standalone program and put them in the lib folder if it's a J2EE project.

Note

When you manually download the libraries, it's the programmer's responsibility to get all the required and dependent JAR files from the official site of hibernate; failing this, they will face errors.

Using Maven

If you use the Maven project, it would get rid of your headache of finding all the JAR files for hibernate and the dependent libraries. You can use the following Maven configuration for hibernate.

How to do it…

Enter the following code into the pom.xml source file to show the dependency mapping of hibernate and MySQL in pom.xml:

…
<dependencies>
  <!-- MySQL connector -->
  <dependency>
    <groupId>MySQL</groupId>
    <artifactId>MySQL-connector-Java</artifactId>
    <version>MySQL-connector-version</version>
  </dependency>
 
  <!-- Hibernate framework -->
  <dependency>
    <groupId>hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>hibernate-version</version>
  </dependency>
<dependencies>

Using this method, Maven will download all the required JAR files related to hibernate and the dependent libraries required for hibernate.

Note

Replace MySQL-connector-version with your required MySQL connector version in the <version>MySQL-connector-version</version> line, and replace hibernate-version with your required hibernate version in the <version>hibernate-version</version> line.

Java Hibernate Cookbook

Java Hibernate Cookbook

Overview of this book

Related Content you might be interested in

Current Title:

Java Hibernate Cookbook

Getting the required libraries for hibernate

Manually downloading

How to do it…

Note

Using Maven

How to do it…

Note