Hibernet Basics to Work With Database

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Beans .java file

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package my.beans;

/**

*

* @author raj

*/

public class Pen {

private int id;

private String penName;

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public String getPenName() {

return penName;

}

public void setPenName(String penName) {

this.penName = penName;

}

}

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Methods To Store and Display Data of Pens

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//default package

public class MyHIbernateBasics{

public static void main(String rk[]){

MyHIbernateBasics start=new MyHIbernateBasics();

start.storePenData("PinkPen");

start.showPensData();

start.updatePensData();

}

public void storePenData(String penName) {

Session mySession = HibernateUtil.getSessionFactory().getCurrentSession();

mySession.beginTransaction();

Pen pen= new Pen();

pen.setPenName(penName);

mySession.save(pen);

session.getTransaction().commit();

HibernateUtil.getSessionFactory().close();

}

public void showPensData(){

Session mySession = HibernateUtil.getSessionFactory().getCurrentSession();

mySession.beginTransaction();

System.out.println(".............PENS DATA..........");

List pensList = session.createQuery("from Pens").list();

for (int i = 0; i < pensList.size(); i++) {

Pen myPen = pensList .get(i);

System.out.println("Id : " + myPen.getId() + " Name : " + myPen.getPenName() );

}

mySession.getTransaction().commit();

HibernateUtil.getSessionFactory().close();

}

public void updatePensData(){

//UPDATIND DATA INTO Pens TABLE

Session mySession = HibernateUtil.getSessionFactory().getCurrentSession();

mySession.beginTransaction();

System.out.println("..............Pens Data..................");

Vector allPens= new Vector(session.createQuery("from Pens").list());

for (Pen p : allPens) {

if (p.getPenName().equals("PinkPen")) {

p.setPenName("RK");

mySession.update(p);

}

}

//DISPLAYING DATA OF THE Pens TABLE

for (Pen myPen : allPens) {

System.out.println("Id : " + myPen.getId() + " Name : " + myPen.getPenName() );

}

mySession.getTransaction().commit();

HibernateUtil.getSessionFactory().close();

}

}

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Java Class file to Get SessionFactory

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package my.utils;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;

public class HibernateUtil {

public static SessionFactory sessionFactory=null;

static

{

try{

sessionFactory=new Configuration().configure().buildSessionFactory();

}

catch(Throwable e){

System.out.println(" :-( Error Message: "+e);

}

}

public static SessionFactory getSessionFactory() {

return sessionFactory;

}

}