What is the difference between using Hibernate and direct interaction with the database via JDBC?

Hibernate is an ORM (Object-Relational Mapping) framework that allows working with a database through Java objects, abstracting SQL queries. Unlike direct interaction via JDBC, where the programmer writes SQL and manages connections and results manually, Hibernate automates these processes.

Main differences:

• Level of abstraction: Hibernate works with objects, while JDBC works with SQL and query results.
• Session management and caching: Hibernate supports first and second-level cache, which improves performance.
• Transactions and relationship management: Hibernate simplifies working with transactions and relationships between entities.
• SQL generation: Hibernate automatically generates SQL, reducing the likelihood of errors.

Example with Hibernate:

Session session = sessionFactory.openSession();
Transaction tx = session.beginTransaction();
User user = session.get(User.class, userId);
user.setName("New Name");
session.update(user);
tx.commit();
session.close();

In JDBC, you need to write SQL manually and manage resources explicitly.