JPA2 Without Toplink Implemation

Create Model Class


package myPack;

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

@Entity

public class Emp
{
@Id
int id;
String name,job;
int salary;

public Emp() {
super();
}


public Emp(int id, String name, String job, int salary) {
super();
this.id = id;
this.name = name;
this.job = job;
this.salary = salary;
}


public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getJob() {
return job;
}
public void setJob(String job) {
this.job = job;
}
public int getSalary() {
return salary;
}
public void setSalary(int salary) {
this.salary = salary;
}

}

Create Factory Class

package myPack;

import javax.persistence.EntityManager;

import javax.persistence.EntityManagerFactory;

import javax.persistence.Persistence;

public class MyFactory 

{

static EntityManagerFactory EMF;

static 

{

EMF=Persistence.createEntityManagerFactory("JPA1withTopLinkPU");

}

public static EntityManager getManager()

{

return EMF.createEntityManager();

}

}

Create Persist Class

package myPack;

import javax.persistence.EntityManager;

import javax.persistence.*;

public class PersistDemo {

public static void main(String[] args)

{

EntityManager m=MyFactory.getManager();

Emp e1=new Emp(8,"Bharat","Developer",15000);

Emp e2=new Emp(9,"Ankit","Developer",17000);

System.out.println("Persisting Entities...........");

EntityTransaction t=m.getTransaction();

t.begin();

m.persist(e1);

m.persist(e2);

t.commit();

m.close();

System.out.println("SUCCESSFULLY PERISTED");

}

}

Create Persistence Configuration Xml File

<?xml version="1.0" encoding="UTF-8"?>

<persistence xmlns="http://java.sun.com/xml/ns/persistence"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence

    http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0">

    

<persistence-unit name="JPA1withTopLinkPU" transaction-type="RESOURCE_LOCAL">

<provider>oracle.toplink.essentials.PersistenceProvider</provider>

  <class>myPack.Emp</class>

  <properties>

<property name = "toplink.jdbc.driver" value = "oracle.jdbc.driver.OracleDriver"/>

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

<property name = "toplink.jdbc.user" value = "system"/>

<property name = "toplink.jdbc.password" value = "oracle"/>

  </properties>

</persistence-unit>

  

</persistence>

Create FetchTest Class

package myPack;

import java.util.Scanner;

import javax.persistence.EntityManager;

public class FetchTest {

public static void main(String[] args) {

EntityManager m=MyFactory.getManager();

Scanner in=new Scanner(System.in);

System.out.println("Enter your id:");

int id=in.nextInt();in.nextLine();

System.out.println("Find method used........");

Emp e1=m.find(Emp.class, id);

System.out.println("Details of fetchd entity using data memeber:");

System.out.println(e1.name+"\t"+e1.job+"\t"+e1.salary);

System.out.println("Details of fetched entity getter Methods");

System.out.println(e1.getName()+"\t"+e1.getJob()+"\t"+e1.getSalary());

System.out.println("GetReference method used......");

Emp e=m.getReference(Emp.class,id);

System.out.println("Details of fetchd entity using data memeber:");

System.out.println(e.name+"\t"+e.job+"\t"+e.salary);

System.out.println("Details of fetched entity getter Methods");

System.out.println(e.getName()+"\t"+e.getJob()+"\t"+e.getSalary());

m.close();

}

}