How to Create And start connection using #Hibernate #java

• Steps to create your first application using Hibernate:

Execute the create statement to create the table – Execute the create statement to create the table

• Create your java project
• Add the required jars to your project Add the required jars to your project
• Create a java bean that’ll represent  the table
• Create the XML mapping file which should be saved as  className.hbm.xml and located near the class
• Create hibernate.cfg.xml to configure the Hibernate
• Create a test class to start inserting objects in the DB.

Create a java bean that’ll represent  the table (POJO)

import  import java.util.Date java.util.Date;;
public class Employee {

private  int id;
private String name;

private Long phone;
private String address;
private Date birthdate ;

public void setName (String name) {
      this.name = name; }

public Long getPhone(){
     return phone;
}
public void   setPhone(Long phone) {
   this.phone = phone;
}
public Employee() {
}
public String getAddress() {
return address;
}
public  public int getId() {
 return id;
}
private void  setId (int id) {
   this.id = id;
}
public void  setAddress (String address) {
   this.address == address;
}
public Date  getBirthdate() {
return birthdate ;
}
public String  getName() {
   return name;
}
public void setBirthdate (Date   birthdate) {
    this.birthdate =birthdate;
}
}

and Hibernate.cfg.xml will be like

• Create hibernate.cfg.xml

this file is the main configuration file that contain

• Driver name
• Data base path
• DB User Name and password
• mapped Tables.

Example :
<hibernate--configuration>
    <session--factory name="sessionfactory">
                   <!--  driver name-->
        <property name="hibernate.connection.driver_class">
             com.mysql.jdbc.Driver
        </property>
        <!--  db path-->
         <property name ="hibernate.connection.url">
                           jdbc:mysql://localhost:3306/Hibernate
         </property>
              <!--DB username /  password-->
         <property name ="hibernate.connection.username ">root</property>
         <property name ="hibernate.connection.password"></property>
         <property name ="hibernate.dialect>
                 org.hibernate.dialect.MySQLDialect
          </property>
                   <!--table mapping-->
          <mapping resource="Employee.hbm.xml"/>
     </session factory>
 </hibernate--configuration>

How to Start the connection ?

• Create Session Factory instance  
• get session if exist or open new session; 
• begin transaction with the session .   
• do you change (persist / update the object
• commit the change

Create a test class

import java.util.Date ;
import  org.hibernate.Session;
import org.hibernate.SessionFactory ;
import  org.hibernate.cfg.Configuration;

public class Test {

public static void main(String[] args)

{
     SessionFactory sessionFactory=  new Configuration().configure().buildSessionFactory();
     Session session = sessionFactory.openSession();
      Employee emp = new Employee();
        emp setName("name");
        emp.setPhone (new Long(1234567);
        emp.setBirthdate(new Date());
        emp.setAddress("address");
       session.beginTransaction();
       session.persist(emp);
       session.getTransaction().commit();
       System. out.println ("Insertion Done");
}
}

Good luck