Hibernate One to one example

hibernate-cfg.xml : 

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


<hibernate-configuration>
    <session-factory>
        <!-- Database connection settings -->
        <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
        <property name="hibernate.connection.url">jdbc:oracle:thin:@localhost:1521:XE</property>
        <property name="hibernate.connection.username">test</property>
        <property name="hibernate.connection.password">test</property>
       
        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.Oracle10gDialect</property>
       
        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>
     
<mapping resource="student.hbm.xml"/>
<mapping resource="address.hbm.xml"/>
       
    </session-factory>


</hibernate-configuration>

student.hbm.xml :

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
      "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">


<hibernate-mapping>
   <class name="Student" table="STUDENT">
    <id name="sid" column="SID">
        <generator class="increment" />
    </id>
    <property name="snm" column="SNAME" type="java.lang.String"/>
</class>


</hibernate-mapping>

address.hbm.xml :

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
      "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">


<hibernate-mapping>


 <class name="Address" table="ADDRS">
    <id name="id" column="ID" type="java.lang.Integer">
    <generator class="foreign">
    <param name="property">parent</param>
    </generator>
    </id>
    <property name="hno" column="HNO" type="java.lang.Integer"/>
    <property name="city" column="CITY" type="java.lang.String"/>
   
    <one-to-one name="parent" class="Student" cascade="all"></one-to-one>
</class>


</hibernate-mapping>

Address.java :

/**
 * @author Mallik
 *
 */
public class Address
{
    /*
     * DataMembers Declaration
     */
private Integer id;
private Integer hno;
private String city;
private Student parent;




public Integer getId() {
    return id;
}
public void setId(Integer id) {
    this.id = id;
}
public Integer getHno() {
    return hno;
}
public void setHno(Integer hno) {
    this.hno = hno;
}


public Student getParent() {
    return parent;
}
public void setParent(Student parent) {
    this.parent = parent;
}
public String getCity() {
    return city;
}
public void setCity(String city) {
    this.city = city;
}
}

Student.java :

/**
 * @author Mallik
 *
 */


//parent pojo class
public class Student {
    /*
     * DataMembers Declaration
     */
private int sid;
private String snm;


//setters&getters
public int getSid() {
    return sid;
}
public void setSid(int sid) {
    this.sid = sid;
}
public String getSnm() {
    return snm;
}
public void setSnm(String snm) {
    this.snm = snm;
}
}

Test.java :

/**
 * @author Mallik
 *
 */
import java.util.*;
import org.hibernate.cfg.*;
import org.hibernate.*;
//one-to-one Application
public class Test {


        public static void main(String[] args) throws Exception {
        // TODO Auto-generated method stub
        System.out.println("nnnnnnnnnnnnnnn");
        //Session Object creation
        Session ses = new Configuration().configure().buildSessionFactory()
                .openSession();


        Student s = new Student();
       
        s.setSnm("kiran");


        Address a = new Address();
        a.setId(12);
        a.setCity("hyd");
        a.setHno(18);
        a.setParent(s);


        Transaction transaction = null;


        try {
            transaction = ses.beginTransaction();
            ses.save(a);
            transaction.commit();
            System.out.println("okkkkkkkkkkk");
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println(e);
            if (transaction != null) {
                transaction.rollback();


            }
        } finally
        {
            ses.close();
        }
    }

}