package com.hibernate.student;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.Transaction;

import com.hibernate.util.HibernateUtil;

public class Main {

   public static void main(String[] args) {
      Session session = HibernateUtil.getSessionFactory().openSession();
      Transaction transaction = null;
      try {
         transaction = session.beginTransaction();
         Address address = new Address("OMR Road", "Chennai", "TN", "600097");
         // By using cascade=all option the address need not be saved
         // explicitly when the student object is persisted the address will
         // be automatically saved.
         // session.save(address);
         Student student1 = new Student("Eswar", address);
         Student student2 = new Student("Joe", address);
         session.save(student1);
         session.save(student2);
         transaction.commit();
      } catch (HibernateException e) {
         transaction.rollback();
         e.printStackTrace();
      } finally {
         session.close();
      }

   }

}

package com.hibernate.student;


/**
* This class contains the student's address
*          details.
*/
public class Address implements java.io.Serializable {

   private long addressId;
   private String street;
   private String city;
   private String state;
   private String zipcode;

   public Address() {
   }

   public Address(String street, String city, String state, String zipcode) {
      this.street = street;
      this.city = city;
      this.state = state;
      this.zipcode = zipcode;
   }

   public long getAddressId() {
      return this.addressId;
   }

   public void setAddressId(long addressId) {
      this.addressId = addressId;
   }

   public String getStreet() {
      return this.street;
   }

   public void setStreet(String street) {
      this.street = street;
   }

   public String getCity() {
      return this.city;
   }

   public void setCity(String city) {
      this.city = city;
   }

   public String getState() {
      return this.state;
   }

   public void setState(String state) {
      this.state = state;
   }

   public String getZipcode() {
      return this.zipcode;
   }

   public void setZipcode(String zipcode) {
      this.zipcode = zipcode;
   }

}

package com.hibernate.student;


/**
* This class contains student details.
*/
public class Student implements java.io.Serializable {

   private long studentId;
   private String studentName;
   private Address studentAddress;

   public Student() {
   }

   public Student(String studentName, Address studentAddress) {
      this.studentName = studentName;
      this.studentAddress = studentAddress;
   }

   public long getStudentId() {
      return this.studentId;
   }

   public void setStudentId(long studentId) {
      this.studentId = studentId;
   }

   public String getStudentName() {
      return this.studentName;
   }

   public void setStudentName(String studentName) {
      this.studentName = studentName;
   }

   public Address getStudentAddress() {
      return this.studentAddress;
   }

   public void setStudentAddress(Address studentAddress) {
      this.studentAddress = studentAddress;
   }

}

<?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="com.hibernate.student.Address" table="ADDRESS">
      <meta attribute="class-description">This class contains the student's address
         details.</meta>
      <id name="addressId" type="long" column="ADDRESS_ID">
         <generator class="native" />
      </id>
      <property name="street" column="ADDRESS_STREET" type="string" length="250" />
      <property name="city" column="ADDRESS_CITY" type="string" length="50" />
      <property name="state" column="ADDRESS_STATE" type="string" length="50" />
      <property name="zipcode" column="ADDRESS_ZIPCODE" type="string" length="10" />
   </class>
</hibernate-mapping>

<?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="com.hibernate.student.Student" table="STUDENT">
        <meta attribute="class-description">This class contains student details.</meta>
        <id name="studentId" type="long" column="STUDENT_ID">
            <generator class="native" />
        </id>
        <property name="studentName" type="string" length="100" not-null="true" column="STUDENT_NAME" />
        <many-to-one name="studentAddress" class="com.hibernate.student.Address" column="STUDENT_ADDRESS" cascade="all" not-null="true" />
    </class>
</hibernate-mapping>

<?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>
        <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
        <property name="hibernate.connection.url">jdbc:oracle:thin:@//localhost:1521/sumanta</property>
        <property name="hibernate.connection.username">scott</property>
        <property name="connection.password">tiger</property>
        <property name="connection.pool_size">1</property>
        <property name="hibernate.dialect">org.hibernate.dialect.HSQLDialect</property>
        <property name="show_sql">true</property>
        <property name="hbm2ddl.auto">create-drop</property>
        <mapping resource="com/hibernate/student/Student.hbm.xml"/>
        <mapping resource="com/hibernate/student/Address.hbm.xml"/>
    </session-factory>
</hibernate-configuration>

CREATE TABLE STUDENT(
STUDENT_ID  LONG,
STUDENT_NAME VARCHAR2(100) NOT NULL,
STUDENT_ADDRESS  VARCHAR2(50) NOT NULL
)


CREATE TABLE ADDRESS(
ADDRESS_ID    LONG,
ADDRESS_STREET    VARCHAR2(250),
ADDRESS_CITY      VARCHAR2(50),
ADDRESS_STATE     VARCHAR2(50),
ADDRESS_ZIPCODE   VARCHAR2(10));