Hibernate is the most used Object/Relational persistence and query service and It is licensed under the open-source GNU Lesser General Public License (LGPL). Hibernate not only see the mapping from Java classes to database tables but also provides data query and recovery facilities. Hibernate is free to download.
This Hibernate Tutorial is designed for beginners and experienced professionals, which helps you to use Hibernate to create database-based web applications in simple and easy steps and learn fundamental and advanced concepts of Hibernate including setting up Hibernate, mapping Java classes to database tables, performing basic and advanced database operations, utilizing Hibernate Query Language (HQL), and more.
What is Hibernate Framework?
Hibernate is a Java framework, licensed under the open-source GNU Lesser General Public License (LGPL), and is available for free download. Developed in 2001 by Gavin King, Hibernate was introduced as a groundbreaking alternative to the EJB2-style entity bean approach. By mapping Java objects to database tables, it streamlines data persistence and retrieval without the need for complex SQL queries. With features like automatic transaction management and caching, Hibernate simplifies and optimizes database interactions, making it an indispensable framework for efficient data management in Java applications.
What is JDBC?
JDBC (Java Database Connectivity) provides a set of Java APIs to access the relational databases from the Java program. Java APIs enable programs to execute SQL statements and interact with any SQL database.
JDBC gives a flexible architecture to write a database-independent web application that can execute on different platforms and interact with different DBMS without any change.
An ORM tool simplifies the data creation, data manipulation and data access and It is a programming technique that maps the object to the data stored in the database.
The ORM tool internally uses the JDBC API to interact with the database.
What is JPA?
- Java Persistence API (JPA) is a Java specification that provides specific functionality and is a standard for ORM tools.
- javax.persistence package contains the JPA classes and interfaces.
Hibernate JPA Annotations:
Hibernate Association Mapping Annotations:
Hibernate with Spring Framework
Hibernate with Database
Hibernate Inheritance Mapping Annotations:
Here are the advantages of Hibernate:
- Hibernate map Java classes to database tables using XML files.
- It provides APIs for storing and retrieving Java objects directly from the database.
- If there is a change in the database, then we just need to change the XML file properties.
- Abstracts out the unknown SQL types and provides a way to work around standard Java Objects.
- It does not require an application server to operate.
- Manipulates Complex relationships of objects in the database.
- Minimizes database access with smart fetching strategies.
- Simple querying of data.
Hibernate Supported Databases
Hibernate supports almost all the major RDBMS. Following is a list of a few of the database engines that are supported by Hibernate −
- HSQL Database Engine
- Microsoft SQL Server Database
- Sybase SQL Server
- Informix Dynamic Server
Hibernate Tutorial – FAQs
1. What is Hibernate and why it is used?
Hibernate is a Java framework used for simplifying database operations by mapping Java objects to relational database tables.
2. What is the basics of Hibernate?
The basics of Hibernate involve defining mappings between Java classes and database tables, allowing seamless interaction between the two and It abstracts away the complexities of database operations, making it easier to work with databases in Java applications.
3. Is Hibernate easy to learn?
Hibernate can be challenging for beginners, but with practice, it becomes easier to learn. A good understanding of Java and basic database concepts is helpful.
4. What is the difference between JDBC and Hibernate?
The main difference between JDBC and Hibernate is that JDBC is a low-level API that requires manual handling of database connections, writing SQL queries, and managing result sets and Hibernate, on the other hand, is a higher-level ORM framework that automates these tasks, allowing developers to work with Java objects and abstracting away the low-level database operations.
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