Attribute Override in Hibernate

Model Class

/**
 *
 */
package com.learnjavabyanand;

import javax.persistence.AttributeOverride;
import javax.persistence.AttributeOverrides;
import javax.persistence.Column;
import javax.persistence.Embedded;
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;


@AttributeOverrides({
@AttributeOverride(name="company_location",column=@Column(name="company1_location")),
@AttributeOverride(name="company_name",column=@Column(name="company1_name"))})
private CompanyDetails comany_detalils;



public CompanyDetails getComany_detalils2() {
return comany_detalils2;
}

public void setComany_detalils2(CompanyDetails comany_detalils2) {
this.comany_detalils2 = comany_detalils2;
}

@Embedded
private CompanyDetails comany_detalils2;


public CompanyDetails getComany_detalils() {
return comany_detalils;
}

public void setComany_detalils(CompanyDetails comany_detalils) {
this.comany_detalils = comany_detalils;
}

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;
}




}

Model Class 2 : 

package com.learnjavabyanand;

import javax.persistence.Embeddable;

@Embeddable

public class CompanyDetails {

private String company_name;

private String company_location;

public String getCompany_name() {

return company_name;

}

public void setCompany_name(String company_name) {

this.company_name = company_name;

}

public String getCompany_location() {

return company_location;

}

public void setCompany_location(String company_location) {

this.company_location = company_location;

}

}

Hibernate Client : 

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");

CompanyDetails comp= new CompanyDetails();

comp.setCompany_name("Rediff");

comp.setCompany_location("Bangalore");

CompanyDetails comp2= new CompanyDetails();

comp2.setCompany_name("Google");

comp2.setCompany_location("Hyderabad");

student.setComany_detalils(comp);

student.setComany_detalils2(comp2);

try{

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

Session session=factory.openSession();

session.beginTransaction();

session.save(student);

session.getTransaction().commit();

session.close();

}catch(Exception e){

e.printStackTrace();

}

}

}

hibernate Configuration 

<?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

Class Embedded In Hibernate

Model Class


/**
 *
 */
package com.learnjavabyanand;

import javax.persistence.Column;
import javax.persistence.Embedded;
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;


@Embedded
private CompanyDetails comany_detalils;


public CompanyDetails getComany_detalils() {
return comany_detalils;
}

public void setComany_detalils(CompanyDetails comany_detalils) {
this.comany_detalils = comany_detalils;
}

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;
}




}

Model Class 2 

package com.learnjavabyanand;

import javax.persistence.Embeddable;

@Embeddable

public class CompanyDetails {

private String company_name;

private String company_location;

public String getCompany_name() {

return company_name;

}

public void setCompany_name(String company_name) {

this.company_name = company_name;

}

public String getCompany_location() {

return company_location;

}

public void setCompany_location(String company_location) {

this.company_location = company_location;

}

}

Client Programe : 

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");

CompanyDetails comp= new CompanyDetails();

comp.setCompany_name("Rediff");

comp.setCompany_location("Bangalore");

student.setComany_detalils(comp);

try{

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

Session session=factory.openSession();

session.beginTransaction();

session.save(student);

session.getTransaction().commit();

session.close();

}catch(Exception e){

e.printStackTrace();

}

}

}

hibernate Configuration 

<?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 

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 

Retrive Obect In Hibernate

Model Class

package com.learnjavabyanand;

import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.persistence.Transient;

/**
 * @author ananddw
 *
 */
//@Entity will create table as per class name By if you specify name then table name must be the name what you will provide inside Entity
@Entity(name="employee_Details")
public class EmployeeDetails {

//we can put this annotation above getter as well
@Id
@Column(name="employee_name")
private String employeeName;

//ignore this variable and not create column for us
private String employeeNumber;

@Column(name="employee_location")
private String employeeLocation ;

//Used because to store Date not full time stamp
@Temporal(TemporalType.DATE)
private Date todayDate;

public String getEmployeeName() {
return employeeName;
}
public void setEmployeeName(String employeeName) {
this.employeeName = employeeName;
}
public String getEmployeeNumber() {
return employeeNumber;
}
public void setEmployeeNumber(String employeeNumber) {
this.employeeNumber = employeeNumber;
}
public String getEmployeeLocation() {
return employeeLocation;
}
public void setEmployeeLocation(String employeeLocation) {
this.employeeLocation = employeeLocation;
}
public Date getTodayDate() {
return todayDate;
}
public void setTodayDate(Date todayDate) {
this.todayDate = todayDate;
}



}

Client Class

package com.learnjavabyanand;

import java.util.Date;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.AnnotationConfiguration;

import org.hibernate.cfg.Configuration;

/**

 * 

 * @author ananddw

 *

 */

public class HibernateClient {

public static void main(String[] args) {

// TODO Auto-generated method stub

EmployeeDetails employee= new EmployeeDetails();

employee.setEmployeeName("Anand Dwivedi");

employee.setEmployeeNumber("MER-13");

employee.setEmployeeLocation("Bangalore");

employee.setTodayDate(new Date());

try{

//get the configuration  and create a session factory once in out application 

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

//create session from session factory to save/retrive or other operation 

Session session=factory.openSession();

//new transaction and save object inside trans

session.beginTransaction();

//save Object 

session.save(employee);

//commit the session 

session.getTransaction().commit();

session.close();

//Retriving All the Object 

employee=null;

session=factory.openSession();

session.beginTransaction();

employee=(EmployeeDetails)session.get(EmployeeDetails.class, "Anand Dwivedi");

System.out.println(employee.getEmployeeName());

}catch(Exception e){

e.printStackTrace();

}

}

}

hibernate Configuration 

<?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.EmployeeDetails"/>

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

   

  </session-factory>

</hibernate-configuration>

Snapshot : 

PS: Add All the required Jars 

Transiant ,Temporaland table Annotation in Hibernate

Model Class: 


package com.learnjavabyanand;

import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.persistence.Transient;

/**
 * @author ananddw
 *
 */
//@Entity will create table as per class name By if you specify name then table name must be the name what you will provide inside Entity
@Entity(name="employee_Details")
public class EmployeeDetails {

//we can put this annotation above getter as well
@Id
@Column(name="employee_name")
private String employeeName;

//ignore this variable and not create column for us
@Transient
private String employeeNumber;

@Column(name="employee_location")
private String employeeLocation ;

//Used because to store Date not full time stamp
@Temporal(TemporalType.DATE)
private Date todayDate;

public String getEmployeeName() {
return employeeName;
}
public void setEmployeeName(String employeeName) {
this.employeeName = employeeName;
}
public String getEmployeeNumber() {
return employeeNumber;
}
public void setEmployeeNumber(String employeeNumber) {
this.employeeNumber = employeeNumber;
}
public String getEmployeeLocation() {
return employeeLocation;
}
public void setEmployeeLocation(String employeeLocation) {
this.employeeLocation = employeeLocation;
}
public Date getTodayDate() {
return todayDate;
}
public void setTodayDate(Date todayDate) {
this.todayDate = todayDate;
}



}

HiberNate Client :-

package com.learnjavabyanand;

import java.util.Date;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;

/**
 *
 * @author ananddw
 *
 */
public class HibernateClient {

public static void main(String[] args) {
// TODO Auto-generated method stub

EmployeeDetails employee= new EmployeeDetails();
employee.setEmployeeName("Anand Dwivedi");
employee.setEmployeeNumber("MER-12");
employee.setEmployeeLocation("Bangalore");
employee.setTodayDate(new Date());

try{
//get the configuration  and create a session factory once in out application
SessionFactory factory=new AnnotationConfiguration().configure().buildSessionFactory();
//create session from session factory to save/retrive or other operation
Session session=factory.openSession();
//new transaction and save object inside trans
session.beginTransaction();
//save Object
session.save(employee);

//commit the session
session.getTransaction().commit();

}catch(Exception e){
e.printStackTrace();
}

}

}

hibernate.cfg.xml

<?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.EmployeeDetails"/>

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

   

  </session-factory>

</hibernate-configuration>

Folder Structure : 

PS: Please Add all the hibernate required jars as well as Database jars

HiberNate Simple Application Using Annotation

Model Class: 


package com.learnjavabyanand;

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

/**
 * @author ananddw
 *
 */
//@Entity will create table as per class name By if you specify name then table name must be the name what you will provide inside Entity
@Entity(name="employee_Details")
public class EmployeeDetails {

//we can put this annotation above getter as well
@Id
@Column(name="employee_name")
private String employeeName;

@Column(name="employee_number")
private String employeeNumber;

@Column(name="employee_location")
private String employeeLocation ;


public String getEmployeeName() {
return employeeName;
}
public void setEmployeeName(String employeeName) {
this.employeeName = employeeName;
}
public String getEmployeeNumber() {
return employeeNumber;
}
public void setEmployeeNumber(String employeeNumber) {
this.employeeNumber = employeeNumber;
}
public String getEmployeeLocation() {
return employeeLocation;
}
public void setEmployeeLocation(String employeeLocation) {
this.employeeLocation = employeeLocation;
}



}

HiberNate Client :-

package com.learnjavabyanand;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.AnnotationConfiguration;

import org.hibernate.cfg.Configuration;

/**

 * 

 * @author ananddw

 *

 */

public class HibernateClient {

public static void main(String[] args) {

// TODO Auto-generated method stub

EmployeeDetails employee= new EmployeeDetails();

employee.setEmployeeName("Anand Dwivedi");

employee.setEmployeeNumber("MER-12");

employee.setEmployeeLocation("Bangalore");

try{

//get the configuration  and create a session factory once in out application 

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

//create session from session factory to save/retrive or other operation 

Session session=factory.openSession();

//new transaction and save object inside trans

session.beginTransaction();

//save Object 

session.save(employee);

//commit the session 

session.getTransaction().commit();

}catch(Exception e){

e.printStackTrace();

}

}

}

hibernate.cfg.xml

<?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.EmployeeDetails"/>

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

   

  </session-factory>

</hibernate-configuration>

Folder Structure : 

PS: Please Add all the hibernate required jars as well as Database jars