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Hibernate Delete Query example

Hibernate Delete Query
In previous article we learnt to implement Hibernate Select Query example in Eclipse, In this article I will implement an example on delete the object from the database(Delete Query) using Hibernate.

Project Structure


Entity class


package entity;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

@Table(name = "STUDENT")
public class StudentEntity {

	@Column(name = "ID")
	private int id;
	@Column(name = "NAME")
	private String name;
	@Column(name = "DEPARTMENT")
	private String department;
	@Column(name = "COLLEGE")
	private String college;

// Create Getters and Setters

Note: I have explained about every annotations used in the above file in the article Generic Hibernate Application Requirements

Hibernate Configuration file

Create a new XML file and give this new configuration file the default name hibernate.cfg.xml and place it src directory of your project.
File: hibernate.cfg.xml

<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"


	<!-- Database connection settings -->
	<property name="hibernate.connection.driver_class">
	<property name="hibernate.connection.username">system</property>
	<property name="hibernate.connection.password">admin</property>
	<property name="hibernate.connection.url">

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

	<!-- Echo all executed SQL to sysout -->
	<property name="show_sql">true</property>

	<!-- Drop and re-create the database schema on startup -->
	<property name="">update</property>
	<!-- Map Entity Class -->
    <mapping class="entity.StudentEntity"></mapping>



Hibernate Utility


package util;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;

import entity.StudentEntity;

public class HibernateUtil {

	public static void main(String[] args) {

		Configuration cf = new Configuration().configure("hibernate.cfg.xml");

		StandardServiceRegistryBuilder srb = new StandardServiceRegistryBuilder();
		ServiceRegistry sr =;
		SessionFactory sf = cf.buildSessionFactory(sr);

		Session session = sf.openSession();
		StudentEntity std = (StudentEntity) session.load(StudentEntity.class, new Integer(2));
		Transaction tx = session.beginTransaction();
		System.out.println("Object Deleted successfully !");

In the above program we are deleting an object, which is already persisted (inserted) in the database; So in order to delete an persisted object, we need to load that object from the database and pass that object to the delete() method of Session interface, now hibernate delete that object whenever the transaction is committed.
In the article Steps to be followed to use Hibernate in Java, I have explained the configuration/code used in above program in detail.

Data in DB before running the program

Hibernate DB

Run it – Eclipse Console

Hibernate Delete

Data in DB after running the program

Delete after

About Mohaideen Jamil

Am currently working as a Struts 2 Developer in a reputed IT Organisations. I can help you with teaching Core java and Struts 2. Follow me on Facebook or Google Plus. If you like my tutorials, consider making a donation to this charity, thanks.