Hibernate CRUD Operations

package com.hibernate.venkat;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.tool.hbm2ddl.SchemaExport;

/**
 * @author venkat
 *
 */
public class TestUser {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
AnnotationConfiguration config=new AnnotationConfiguration();
config.addAnnotatedClass(UserDeatils.class);
config.configure("hibernate.cfg.xml");

//new SchemaExport(config).create(true, true);


SessionFactory sf=config.buildSessionFactory();
Session s=sf.getCurrentSession();
s.beginTransaction();

//for (int i = 1; i <=10; i++) {
// UserDeatils user=new UserDeatils();
// user.setUserName("User "+i);
// s.save(user);
//
//}
UserDeatils user=new UserDeatils();

user=(UserDeatils)s.get(UserDeatils.class, 7);

user.setUserName("Updated user 7");

s.update(user);
System.out.println("Data fetched from Table  "+user.getUserName());

user=(UserDeatils)s.get(UserDeatils.class, 2);
System.out.println(user.getUserName());



s.getTransaction().commit();






}

}

---------------------------------------------------------------------------------------------

package com.hibernate.venkat;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

@Entity

public class UserDeatils {

private int userId;

private String userName;

@Id

@GeneratedValue(strategy=GenerationType.AUTO)

public int getUserId() {

return userId;

}

public void setUserId(int userId) {

this.userId = userId;

}

public String getUserName() {

return userName;

}

public void setUserName(String userName) {

this.userName = userName;

}

}

---------------------------------------------------------------------------------------------

<?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="connection.driver_class">oracle.jdbc.OracleDriver</property>

        <property name="connection.url">jdbc:oracle:thin:@localhost:1521:xe</property>

        <property name="connection.username">venkat</property>

        <property name="connection.password">venkat</property>

        <!-- JDBC connection pool (use the built-in) -->

        <property name="connection.pool_size">2</property>

        <!-- SQL dialect -->

        <property name="dialect">org.hibernate.dialect.Oracle10gDialect</property>

        <!-- Enable Hibernate's current session context -->

        <property name="current_session_context_class">thread</property>

        <!-- Disable the second-level cache  -->

        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

        <!-- Echo all executed SQL to stdout -->

        <property name="show_sql">true</property>

        

        <!-- Drop and re-create the database schema on startup -->

<!--         <property name="hbm2ddl.auto">create</property> -->

<!--         <mapping resource="org/hibernate/tutorial/domain/Event.hbm.xml"/> -->

<!--         <mapping resource="org/hibernate/tutorial/domain/Person.hbm.xml"/> -->

    </session-factory>

</hibernate-configuration>