<class 
    name="org.model.Customer" 
    table="customers"
    lazy="false"
    dynamic-update="true"
    dynamic-insert="true"
>

    <id
        name="id"
        type="java.lang.String"
        column="ID"
    >
    
        <generator class="uuid.hex" />
    </id>

    <property
        name="name"
        type="java.lang.String"
        column="NAME"
        length="15"
    />
    <property
        name="sex"
        type="java.lang.String"
        column="SEX"
        length="1"
    />
    <property
        name="description"
        type="java.lang.String"
        column="DESCRIPTION"
        length="65535"
    />

    <!-- Associations -->
  
    <!-- bi-directional one-to-many association to Order -->

    <set
        name="orders"
        lazy="true"
        inverse="true"
        cascade="all"

    >
        <key>
            <column name="CUSTOMER_ID" />
        </key>
        
        <one-to-many 
            class="org.model.Order"
        />
    </set>

</class>

package test;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.model.Customer;

public class Test {

    private static SessionFactory sessionFactory;
    static{
        sessionFactory = new Configuration().configure().buildSessionFactory();
    }
    
    
    public void createNewCustomer(Customer c){
        Session sess = sessionFactory.openSession();
        Transaction tx = sess.beginTransaction();
        sess.save(c);
        tx.commit();
    }
    
    public void updateCustomer(Customer c ){
        Session sess = sessionFactory.openSession();
        Transaction tx = sess.beginTransaction();
        sess.update(c);
        tx.commit();
    }
    
    
    public static void main(String[] args) {
        Test t = new Test();
        Customer c = new Customer();
        c.setId("8a8482d51d18ec17011d18ec1a750001");
        c.setDescription("sdfsdfdsfsdf");
        t.updateCustomer(c);
    }
}