Auto Increment Column Name in Hibernate

Model Class


/**
 *
 */
package com.learnjavabyanand;

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

/**
 * @author ananddw
 *
 */
@Entity
@Table(name="student_details")
public class Student {

@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private int studentrollnumber;

@Column(name="student_name")
private String studentName;

public int getStudentrollnumber() {
return studentrollnumber;
}

public void setStudentrollnumber(int studentrollnumber) {
this.studentrollnumber = studentrollnumber;
}

public String getStudentName() {
return studentName;
}

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




}

Client Class: 

package com.learnjavabyanand;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.AnnotationConfiguration;

/**

 * @author ananddw

 *

 */

public class StudentClient {

public static void main(String[] args) {

// TODO Auto-generated method stub

Student student= new Student();

student.setStudentName("Anand Dwivedi");

Student student2= new Student();

student2.setStudentName("Ajeet Singh");

Student student3= new Student();

student3.setStudentName("Antrish Mishra");

try{

SessionFactory factory=new AnnotationConfiguration().configure().buildSessionFactory();

Session session=factory.openSession();

session.beginTransaction();

session.save(student);

session.save(student2);

session.save(student3);

session.getTransaction().commit();

session.close();

}catch(Exception e){

e.printStackTrace();

}

}

}

hibernate Configuration file 

<?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>

  <!--  Postgres DB Details  -->

    <property name="hibernate.connection.driver_class">org.postgresql.Driver</property>

    <property name="hibernate.connection.url">jdbc:postgresql://127.0.0.1:5432/hibernate</property>

    <property name="hibernate.connection.username">postgres</property>

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

      <!--  Postgres DB Details End  -->

    

    <!-- Postgres Dialect has information of list of  queries avil in Postgres DB -->

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

    <!-- Postgres Dialect End -->

    

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

    

    <!--  Echo show Query  -->

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

     <!--  Echo show Query End  -->

    

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

    

    <!--  Create every time table and insert Data -->

    <property name="hibernate.hbm2ddl.auto">create</property>

    <!--  Create every time table and insert Data End -->

    

    <!--  Define Package for mapping class -->

    

    <mapping class="com.learnjavabyanand.Student"/>

    <!--  Define Package for mapping class End -->

   

  </session-factory>

</hibernate-configuration>

Snapshot : 

PS: Add all the required Jars