🖇️ Hibernate ORM Basics

A comprehensive learning project demonstrating fundamental Hibernate ORM operations through practical examples. This repository contains eight modular Maven projects, each focusing on specific Hibernate concepts and database operations.

Project Structure

• firstHibernate - Basic entity creation and persistence (INSERT)
• secondHibernate - Reading entities from database (SELECT)
• thirdHibernate - Deleting entities from database (DELETE)
• fourthHibernate - Updating entities in database (UPDATE)
• fifthHibernate - Advanced querying techniques
• sixthHibernate - Relationship mappings and associations
• seventhHibernate - Caching strategies and performance optimization
• eighthHibernate - Transaction management and error handling

Technology Stack

• Java 17 - Programming language
• Hibernate 7.2.2.Final - ORM framework
• MySQL 8.0.33 - Database system
• Maven - Build and dependency management

Prerequisites

• Java Development Kit (JDK) 17 or higher
• Apache Maven 3.6 or higher
• MySQL Server 8.0 or higher

Database Setup

1. Create a database named hibernatedb
2. Update database credentials in hibernate.cfg.xml for each project:

<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernatedb</property>
<property name="hibernate.connection.username">your_username</property>
<property name="hibernate.connection.password">your_password</property>

Running the Projects

Navigate to any project directory and run:

mvn clean compile
mvn exec:java -Dexec.mainClass="com.kodnest.{projectName}.App"

Example for firstHibernate:

cd firstHibernate
mvn clean compile
mvn exec:java -Dexec.mainClass="com.kodnest.firstHibernate.App"

Core Concepts

• Entity Management - JPA annotations, primary keys, column mappings
• CRUD Operations - Create, Read, Update, Delete operations
• Session Management - Session factory, transactions, resource handling
• Configuration - Database connections, dialects, SQL logging

Learning Path

Progress through projects sequentially: firstHibernate → secondHibernate → thirdHibernate → fourthHibernate → advanced modules