Overview

Hibernate ORM maps Java classes to database tables and takes care of generating SQL, managing connections and caching. It implements the JPA standard and also offers its own extra features such as HQL, filters and advanced caching.

It is the engine behind Spring Data JPA in most projects, so knowing Hibernate well helps you write faster, cleaner data code and diagnose performance problems.

Where it is used

• Enterprise data access layers
• Spring Boot back-ends
• Migrating from JDBC to ORM
• Performance tuning of database-heavy applications

Using a Session

try (Session session = sessionFactory.openSession()) {
    Transaction tx = session.beginTransaction();

    Student s = new Student();
    s.setName("Anu");
    session.persist(s);

    tx.commit();
}