Java ORM Hibernate

ORM with Hibernate

Object-Relational Mapping (ORM) is a technique for converting data between incompatible systems using object-oriented programming languages. Hibernate is a popular ORM framework for Java that simplifies database interactions by mapping Java objects to database tables.

Key Concepts in Hibernate

1. Configuration: Setting up Hibernate with the appropriate database settings.
2. Session: The primary interface for performing CRUD operations in Hibernate.
3. SessionFactory: A factory for Session objects.
4. Transaction: An interface for handling transactions.
5. Mappings: Defining how Java classes map to database tables.

Setting Up Hibernate

1. Add Hibernate Dependencies

To use Hibernate, you need to add the necessary dependencies to your project. If you’re using Maven, add the following dependencies to your pom.xml:

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>5.4.32.Final</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.25</version>
</dependency>

2. Create Hibernate Configuration File

Create a hibernate.cfg.xml file to configure Hibernate settings, such as database connection details.