21.0 Hibernate Example - Read Object

Example 2.a - Read the programmer Object

-------------------------------------------------------------------------------------------------------------

ReadDemo.java

-------------------------------------------------------------------------------------------------------------

package com.demo.spring.test;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;

import com.demo.spring.entitiy.Programmer;

public class ReadDemo {

public static void main(String[] args) {

SessionFactory factory=new Configuration()

.configure("hibernate.cfg.xml")

.addAnnotatedClass(Programmer.class)

.buildSessionFactory();

Session session=factory.getCurrentSession();

try{

session.beginTransaction();

Programmer programmer=new Programmer("Amit Kumar","amit.kumar@tiwari.com");

session.save(programmer);

session.getTransaction().commit();

session=factory.getCurrentSession();

session.beginTransaction();

System.out.println("\nGetting student with id : "+ programmer.getId());

Programmer myProgrammer=session.get(Programmer.class, programmer.getId());

System.out.println("Get complete  " + myProgrammer);

System.out.println("Done");

}

finally{

session.close();

}

}

}

-------------------------------------------------------------------------------------------------------------

OUTPUT

-------------------------------------------------------------------------------------------------------------

Mar 04, 2018 1:20:13 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections <init>

INFO: HHH000115: Hibernate connection pool size: 1 (min=1)

Mar 04, 2018 1:20:13 AM org.hibernate.dialect.Dialect <init>

INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect

Hibernate: insert into programmer (email, Name) values (?, ?)

Getting student with id : 8

Hibernate: select programmer0_.id as id1_0_0_, programmer0_.email as email2_0_0_, programmer0_.Name as Name3_0_0_ from programmer programmer0_ where programmer0_.id=?

Get complete L Programmer [id=8, name=Amit Kumar, email=amit.kumar@tiwari.com]

Done

Example 2.b - Read the programmer Object

-------------------------------------------------------------------------------------------------------------

QueryDemo.java

-------------------------------------------------------------------------------------------------------------

package com.demo.spring.test;

import java.util.List;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;

import com.demo.spring.entitiy.Programmer;

public class QueryDemo {

public static void main(String[] args) {

SessionFactory factory=new Configuration()

.configure("hibernate.cfg.xml")

.addAnnotatedClass(Programmer.class)

.buildSessionFactory();

Session session=factory.getCurrentSession();

try{

session.beginTransaction();

System.out.println("\nAll Programmers list 1");

List<Programmer> programmer=session.createQuery("from Programmer").list();

displayProgrammer(programmer);

System.out.println("\n\nProgrammers List 2");

programmer=session.createQuery("from Programmer where name like '%Kumar'").list();

displayProgrammer(programmer);

System.out.println("\n\nProgrammers List 3");

programmer=session.createQuery("from Programmer where email like '%tiwari%' and name like '%it%'").list();

displayProgrammer(programmer);

session.getTransaction().commit();

System.out.println("Done!");

}

finally{

session.close();

}

}

private static void displayProgrammer(List<Programmer> programmer) {

for(Programmer tmpProgrammer : programmer){

System.out.println(tmpProgrammer);

}

}

}

-------------------------------------------------------------------------------------------------------------

OUTPUT

-------------------------------------------------------------------------------------------------------------