First Hibernate Application
In this tutorial you will learn about how to create an application of Hibernate 4.
Here I am giving an example which will demonstrate you how can you make your application using Hibernate 4. To create an application I will use Eclipse IDE ( to see the basic requirement before creating an application with Hibernate 4 click here ).
Example :
Following steps that I have followed to create an application. These are as follows :
Here is the video tutorial of: "First Hibernate Application"
Step 1 : At first I have created a table named person in MySQL.
CREATE TABLE `person` ( `Id` int(10) NOT NULL, `Name` varchar(15) default NULL, PRIMARY KEY (`Id`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1
Step 2 : Created a Java Project named coreHibernateExample (you can give the name as you wish).
File -> New -> project / Java Project -> giveProjectName -> Finish (in this example I have given coreHibernateExample).
Step 3 : Add the Hibernate jar files (to see how to add Hibernate's jar files click here )
Step 4 : Created a package named roseindia (you can give the name as you wish) under the src folder.
Select src -> Right Click ->New -> package -> givePackageName -> Finish (in this exmaple I have given roseindia).
Ste 5 : Created a file by following the name convention hibernate.cfg.xml (mandatory ) file under the src folder that the hibernate utilize to create a connection pool and the required environment setup.
Select src -> Right Click -> New -> File ->hibernate.cfg.xml -> Finish.
<?xml version='1.0' encoding='utf-8'?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hibernate.connection.url">jdbc:mysql://192.168.10.13:3306/data </property> <property name="hibernate.connection.username">root</property> <property name="hibernate.connection.password">root</property> <property name="hibernate.connection.pool_size">10</property> <property name="show_sql">true</property> <property name="dialect">org.hibernate.dialect.MySQLDialect</property> <property name="hibernate.current_session_context_class">thread</property> </session-factory> </hibernate-configuration>
Step 6 : Created a POJO class (persistent class) named Person.java in the package roseindia.
package roseindia; public class Person { int id; String name; public Person() { } public Person(int id, String name) { super(); this.id = id; this.name = name; } 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; } }
Step 7 : Crated a file named ( you may follow the naming convention ClassName.hbm.xml ) person.hbm.xml under the src folder to map a Person Object to the database table named person
<?xml version='1.0'?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="roseindia"> <class name="Person" table="person"> <id name="id" type="int" column="Id" > <generator class="assigned"/> </id> <property name="name"> <column name="Name" /> </property> </class> </hibernate-mapping>
Step 8 : Developed a code by writing a java class named PersonDetail in the package roseindia which will persist the Person object in the person table.
package roseindia; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.cfg.Configuration; import org.hibernate.service.ServiceRegistry; import org.hibernate.service.ServiceRegistryBuilder; public class PersonDetail { private static SessionFactory sessionFactory; private static ServiceRegistry serviceRegistry; public static void main(String[] args) { Session session = null; try { try { Configuration cfg = new Configuration().addResource( "person.hbm.xml").configure(); serviceRegistry = new ServiceRegistryBuilder().applySettings( cfg.getProperties()).buildServiceRegistry(); sessionFactory = cfg.buildSessionFactory(serviceRegistry); } catch (Throwable ex) { System.err.println("Failed to create sessionFactory object."+ ex); throw new ExceptionInInitializerError(ex); } session = sessionFactory.openSession(); Person person = new Person(); System.out.println("Inserting Record"); Transaction tx = session.beginTransaction(); person.setId(1); person.setName("Roseindia"); session.save(person); tx.commit(); System.out.println("Done"); } catch (Exception e) { System.out.println(e.getMessage()); } finally { session.close(); } } }
Execute the example : You can execute the application as follows
Go to your PersonDetail class Right Click -> Run As -> Java Application or,
Select from the menu bar tab Run -> Run or,
press the Ctrl button along with f11 i.e. CTRL + f11.
Output :
When you will run the application output will be as follows :
1. On console of Eclipse the output will be displayed as :
2. After Successfully execution of the code the record will be saved to the table that you had created in MySQL. as :