How to Run Hibernate

There are couple of jars that are needed to run the Hibernate Applications. Some jars from third party and some are from JBoss community.
Jars:
• antlr.jar
• backport-util-concurrent.jar
• hibernate-commons-annotations.jar
• hibernate-annotations.jar
• hibernate-ehcache.jar
• log4j.jar
• slf4j-log4j12.jar
• slf4j-api.jar
• javassist.jar
• commons-collections.jar
• dom4j.jar
• lucene-core.jar
• commons-logging.jar
• hibernate-search.jar
• jta.jar
• hibernate-core.jar
• ehcache.jar
• xml-apis.jar

those mentioned jars can be download from respective sites or from
Jar Finder

To create Hybernate Application,
Step1 : You need to add all those jars into your application class path.
Step2 : Create hibernate configuration file (hibernate.cfg.xml).
file will contain hibernate runtime properties of Session factory eg. "driver-class" ,"database-url", "user","password" etc. and hibernate mapping resources.
eg.
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">
com.mysql.jdbc.Driver
</property>
<property name="hibernate.connection.url">
jdbc:mysql://localhost:3306/ioffice
</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password"></property>
<property name="hibernate.connection.pool_size">10</property>
<property name="show_sql">true</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<!-- Mapping files -->
<mapping resource="contact.hbm.xml" />
</session-factory>
</hibernate-configuration>

Step3 : Create mapping file like <class-name>.hbm.xml, the content will be like:
eg.
<?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="Contact" table="CONTACT">
<id name="id" type="long" column="ID" >
<generator class="assigned"/>
</id>

<property name="firstName">
<column name="FIRSTNAME" />
</property>
<property name="lastName">
<column name="LASTNAME"/>
</property>
<property name="email">
<column name="EMAIL"/>
</property>
</class>
</hibernate-mapping>

Step4 : Create a class named "Contact.java"

public class Contact {
private String firstName;
private String lastName;
private String email;
private long id;

public String getEmail() {
return email;
}

public String getFirstName() {
return firstName;
}

public String getLastName() {
return lastName;
}

public void setEmail(String string) {
email = string;
}

public void setFirstName(String string) {
firstName = string;
}

public void setLastName(String string) {
lastName = string;
}

public long getId() {
return id;
}

public void setId(long l) {
id = l;
}

@Override
public String toString() {
return this.id + ", " + this.firstName + ", " + this.lastName
+ ", " + this.email;
}
}

Step5: Use
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

public class FirstExample {
private SessionFactory sessionFactory = null;

public FirstExample() {
sessionFactory = new Configuration().configure().buildSessionFactory();
}

public SessionFactory getSessionFactory() {
return sessionFactory;
}

public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}

public void save(Contact contact)
{
Session session = null;
try {
session = this.getSessionFactory().openSession();
Transaction tr = session.beginTransaction();
System.out.println("Inserting Record");
session.save(contact);
tr.commit();
System.out.println("Done");
}
catch (Exception e) {
System.out.println(e.getMessage());
} finally {
session.flush();
session.close();
}
}

public void delete(Contact contact)
{
Session session = null;
try {
session = this.getSessionFactory().openSession();
Transaction tr = session.beginTransaction();
System.out.println("Deleting Record.");
session.delete(contact);
tr.commit();
System.out.println("Done");
}
catch (Exception e) {
System.out.println(e.getMessage());
} finally {
session.flush();
session.close();
}
}

public void update(Long key, Contact contact)
{
Session session = null;
try {
session = this.getSessionFactory().openSession();
Transaction tr = session.beginTransaction();
System.out.println("Updating Record.");
Contact cntct = (Contact) session.get(Contact.class, key);
cntct = contact;
session.update(cntct);
tr.commit();
System.out.println("Done");
}
catch (Exception e) {
System.out.println(e.getMessage());
} finally {
session.flush();
session.close();
}
}

public Contact fetch(Long key)
{
Session session = null;
Contact contact = null;
try {
session = this.getSessionFactory().openSession();
System.out.println("Query Record.");
contact = (Contact) session.get(Contact.class, key);
System.out.println("Done");
}
catch (Exception e) {
System.out.println(e.getMessage());
} finally {
session.flush();
session.close();
}
return contact;
}

public static void main(String[] args) {
FirstExample fEx = new FirstExample();
Contact cont = fEx.fetch(new Long(4));
System.out.println(cont);
}
}