import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="ORDER")
public class Order {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name="Order_no")
    private int _OrderNo;



    @Column(name="Customer_no")
    private int _CustomerNo;

    public Order() {

    }

    public Order(int CustomerNo) {


        this._CustomerNo = CustomerNo;
    }


    //getters and setters logic goes here
    public int get_OrderNo() {
        return _OrderNo;
    }

    public void set_OrderNo(int OrderNo) {
        this._OrderNo = OrderNo;
    }


    public int get_CustomerNo() {
        return _CustomerNo;
    }

    public void set_CustomerNo(int CustomerNo) {
        this._CustomerNo = CustomerNo;
    }

    @Override
    public String toString() {
        return "Order [_OrderNo=" + _OrderNo + ",  _CustomerNo=" + _CustomerNo + "]";
    }

}

public class CreateOrder {

    public static void main(String[] args) {
        // Create SessionFactory

        SessionFactory factory = new Configuration().configure("hibernate.cfg.xml").addAnnotatedClass(Order.class)
                .buildSessionFactory();

        // Create Session

        Session session = factory.getCurrentSession();

        try {
            // use the session object to save the java object

            // create the order object
            System.out.println("Creating the Order Object.......");

            Order tempOrder = new Order(123);

            // start the transaction
            session.beginTransaction();

            // save the order object
            System.out.println("Saving the Order ");
            session.save(tempOrder);

            // commit the transaction
            session.getTransaction().commit();
            System.out.println("Done!!");
        }

        finally {
            factory.close();
        }
    }

}

<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

    <session-factory>

        <!-- JDBC Database connection settings -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost:3306/hb_student_retail?useSSL=false</property>
        <property name="connection.username">hbstudent</property>
        <property name="connection.password">hbstudent</property>

        <!-- JDBC connection pool settings ... using built-in test pool -->
        <property name="connection.pool_size">1</property>

        <!-- Select our SQL dialect -->
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>

        <!-- Echo the SQL to stdout -->
        <property name="show_sql">true</property>

        <!-- Set the current session context -->
        <property name="current_session_context_class">thread</property>

    </session-factory>

</hibernate-configuration>