package main;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;

public class Main {
    public static void main(String[] args) {
        Configuration conf = new Configuration().configure();
        StandardServiceRegistryBuilder builder = new StandardServiceRegistryBuilder();
        builder.applySettings(conf.getProperties());
        ServiceRegistry registry = builder.build();
        SessionFactory sessionFactory = conf.buildSessionFactory(registry);

        Session session = sessionFactory.openSession();
        Transaction transaction = session.beginTransaction();

        Employee employee = new Employee();
        employee.setFirstName("John");
        employee.setLastName("Doe");
        employee.setSalary(1000000);

        session.save(employee);
        transaction.commit();
        sessionFactory.close();
    }
}

package main;

import javax.persistence.*;

@Entity
@Table(name="EMPLOYEE")
public class Employee {
    @Id
    @GeneratedValue
    @Column(name = "ID")
    private int id;

    @Column(name = "FIRST_NAME")
    private String firstName;

    @Column(name = "LAST_NAME")
    private String lastName;

    @Column(name = "SALARY")
    private int salary;

    public Employee() {}

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public int getSalary() {
        return salary;
    }

    public void setSalary(int salary) {
        this.salary = salary;
    }
}

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
    <session-factory>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>
        <property name="hibernate.connection.driver_class">com.mysql.cj.jdbc.Driver</property>
        <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/world</property>
        <property name="hibernate.connection.username">root</property>
        <property name="hibernate.connection.password">root</property>
        <property name="hibernate.connection.verifyServerCertificate">false</property>
        <property name="hibernate.connection.useSSL">true</property>
        <property name="hibernate.connection.requireSSL">false</property>
        <property name="hibernate.show_sql">true</property>
        <property name="hibernate.hbm2ddl.auto">create</property>
        <property name="hibernate.format_sql">true</property>
        <mapping class="main.Employee"/>
    </session-factory>
</hibernate-configuration>