Hibernate persist method example

Hibernate persist method example

Employee.java

package com.smgc;

public class Employee {
private int id;
private String name;
private String designation;

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 getDesignation() {
return designation;
}

public void setDesignation(String designation) {
this.designation = designation;
}
}

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>

<property name="hbm2ddl.auto">update</property>

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

<property name="connection.url">jdbc:mysql://localhost:3306/test</property>

<property name="connection.username">root</property>

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

<property name="connection.driver_class">com.mysql.jdbc.Driver</property>

<mapping resource="Employee.hbm.xml" />

</session-factory>

</hibernate-configuration>

Employee.hbm.xml

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

<!DOCTYPE hibernate-mapping PUBLIC  

 "-//Hibernate/Hibernate Mapping DTD 3.0//EN"  

 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

  

<hibernate-mapping>

<class name="com.smgc.Employee" table="employee">

<id name="id">

<generator class="assigned"></generator>

</id>

<property name="name"></property>

<property name="designation"></property>

</class>

</hibernate-mapping>  

EmpMain.java

package com.smgc;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.Transaction;

import org.hibernate.cfg.Configuration;

public class EmpMain {

public static void main(String[] args) {

// TODO Auto-generated method stub

// creating configuration object

Configuration cfg = new Configuration();

cfg.configure("hibernate.cfg.xml");// populates the data of the

// configuration file

// creating seession factory object

SessionFactory factory = cfg.buildSessionFactory();

// creating session object

Session session = factory.openSession();

// creating transaction object

Transaction t = session.beginTransaction();

Employee e1 = new Employee();

e1.setId(111);

e1.setName("Piyush");

e1.setDesignation("Lecturer");

session.persist(e1); // Persistent Object since it is attached to hibernate

// session

System.out.println("successfully saved");

t.commit();

// here we can say it is detached object as it went to DB now.

session.close();

}

}