What is the role of Hibernate in database operations and why is it used in applications?

Hibernate is an ORM (Object-Relational Mapping) framework for Java that simplifies working with databases. Its role is to automatically convert Java objects into database table records and vice versa, saving developers from writing a lot of SQL code.

Why use Hibernate:

• Allows working with the database at the object level, which is more convenient and safer.
• Provides caching and query optimization.
• Supports various DBMS without changing the code.
• Manages transactions and relationships between objects.

Example of usage:

@Entity
public class User {
    @Id
    @GeneratedValue
    private Long id;
    private String name;
    // getters and setters
}

// In code
Session session = sessionFactory.openSession();
session.beginTransaction();
User user = new User();
user.setName("Ivan");
session.save(user);
session.getTransaction().commit();
session.close();