ORM (Object-Relational Mapping) is a powerful technique that bridges the gap between object-oriented programming and relational databases. In Java, frameworks like Hibernate, JPA, and MyBatis simplify database interactions by allowing developers to work with objects rather than writing raw SQL.

What is ORM?

ORM maps Java objects to database tables, enabling seamless data manipulation. Key benefits include:

  • Reduced boilerplate code 🛠️
  • Database portability 🌐
  • Improved productivity 📈
ORM Overview

Popular ORM Frameworks in Java

  1. Hibernate 🐘
    A robust ORM framework that provides advanced features like caching and lazy loading.
    Learn more about Hibernate

  2. JPA (Java Persistence API) 📁
    A standard API for ORM in Java, often used with implementations like Hibernate or EclipseLink.

  3. MyBatis 🧠
    A flexible ORM framework that allows developers to use SQL directly while mapping results to objects.

How to Use ORM in Java

  1. Define entity classes with annotations (e.g., @Entity, @Id).
  2. Configure the ORM framework to connect with your database.
  3. Use HQL or SQL queries to interact with data.
Code Example

Best Practices for ORM

  • Avoid overcomplicating mappings for simple queries.
  • Use caching to improve performance.
  • Regularly optimize database schemas.

Explore advanced JDBC techniques for deeper insights into database operations.