Hibernate Unknown Entity

Check if you have @Entity on your Equipment class.

This annotation (@Entity) is marking a class as Hibernate (JPA) entity.

For me it was a refactoring issue. I refactored my entity package but forgot to change the component scan path to the new package name. After that was realized and changed, it worked!

Try adding following Annotation on top of your Entity Class Equipment. Change the table name accordingly if required :

@Entity
@Table(name = "Equipment")
@XmlRootElement

package Test;

import java.util.EnumSet;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.boot.Metadata;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.tool.hbm2ddl.SchemaExport;
import org.hibernate.tool.schema.TargetType;
import org.junit.Test;

import Entity.Users;

public class TestMain {
    public static void main(String[] arg){
         try {
        ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().configure().build();
        SessionFactory sessionFactory = new MetadataSources( serviceRegistry ).buildMetadata().buildSessionFactory();
        Session session=sessionFactory.openSession();
        Transaction transaction=session.beginTransaction();
        Users users=new Users();
        users.setId(2);
        session.save(users);
        transaction.commit();
        session.close();
        sessionFactory.close();
         }catch(Throwable th){
                System.err.println("Init SessionFactory creation failed" );
                System.err.println(th);
                throw new ExceptionInInitializerError(th);
         }finally {

        }
    }


}