Hilbernate Database Configuration without XML

package com.springboot.mvc;

import java.util.Properties;
import com.springboot.mvc.models.Customer;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;
import org.hibernate.service.ServiceRegistry;

public class HibernateUtil {
  private static SessionFactory sessionFactory;

  public static SessionFactory getSessionFactory() {
    if (sessionFactory == null) {
      try {
        Configuration configuration = new Configuration();
        // Hibernate settings equivalent to hibernate.cfg.xml's properties
        Properties settings = new Properties();
        settings.put(Environment.DRIVER, "com.mysql.cj.jdbc.Driver");
        settings.put(Environment.URL,
            "jdbc:mysql://192.168.99.100:3306/JDBC_spring_mvc_tutorial?useSSL=false&serverTimezone=UTC");
        settings.put(Environment.USER, "cclee");
        settings.put(Environment.PASS, "ccleedb12345");
        settings.put(Environment.DIALECT, "org.hibernate.dialect.MySQL55Dialect");
        settings.put(Environment.SHOW_SQL, "true");
        settings.put(Environment.CURRENT_SESSION_CONTEXT_CLASS, "thread");
        settings.put(Environment.HBM2DDL_AUTO, "create-drop");

        configuration.setProperties(settings);
        configuration.addAnnotatedClass(Customer.class);
       // we add more and more classes here.
       
       
        ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
            .applySettings(configuration.getProperties()).build();
        sessionFactory = configuration.buildSessionFactory(serviceRegistry);
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
    // Then:
    // Session session = sessionFactory.openSession();
    // Transaction transaction = session.beginTransaction();

    return sessionFactory;
  }
}