How Can Hibernate Automatically Create and Update Database Tables from Entity Classes?

Automatically Creating and Updating Database Tables Using Entity Classes in Hibernate

Your Java Persistence API (JPA) entity class, ServerNode, and persistence.xml configuration are complete. However, if you wish to automatically create and/or update database tables based on your entity classes using Hibernate, there are additional steps you can take:

In your persistence.xml, ensure you have set the hibernate.hbm2ddl.auto property to either "create" or "create-drop":

<property name="hibernate.hbm2ddl.auto" value="create"/>

• "create" will create tables if they do not exist.
• "create-drop" will create tables and drop them when the session factory is closed.

In your entity class, consider explicitly setting the javax.persistence.Table annotation:

@Entity
@Table(name = "MyTableName")
public class ServerNode {
  // ...
}

This annotation specifies the table name that will be mapped to the entity class.

With these settings, Hibernate will automatically create or update the "Icarus" database tables according to the entity class definitions when the session factory is created.

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