Hibernate is an object relational mapping model develop the framework for java.in article we use to get the current date and time and MySQL version using Hibernate (ORM).
you have to download the following dependencies
mysql connector jar
hibernate-core 5.3.29 download jar
after download the dependencies you have add into the lib folder i attached the video lesson below.how to make step by
step.
Create the Class Appinitializer
Appinitializer
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.boot.Metadata; import org.hibernate.boot.MetadataSources; import org.hibernate.boot.registry.StandardServiceRegistry; import org.hibernate.boot.registry.StandardServiceRegistryBuilder; import org.hibernate.cfg.Environment; import java.util.HashMap; import java.util.Map; public class <strong>Appinitializer</strong>{ public static void main(String args[]) { printDateTime(); MysqlVersion(); } public static void MysqlVersion() { try(Session session = HibranateUtil.getSessionFactory().openSession()) { Object obj = session.createNativeQuery("SELECT VERSION()").getSingleResult(); System.out.println(obj); } } public static void printDateTime() { try(Session session = HibranateUtil.getSessionFactory().openSession()) { Object obj = session.createNativeQuery("SELECT NOW()").getSingleResult(); System.out.println(obj); } } } |
HibranateUtil.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | import org.hibernate.SessionFactory; import org.hibernate.boot.Metadata; import org.hibernate.boot.MetadataSources; import org.hibernate.boot.registry.StandardServiceRegistry; import org.hibernate.boot.registry.StandardServiceRegistryBuilder; import org.hibernate.cfg.Environment; import java.util.HashMap; import java.util.Map; public class HibranateUtil { private static StandardServiceRegistry standardServiceRegistry; private static SessionFactory sessionFactory; static { try { if (sessionFactory == null) { standardServiceRegistry = new StandardServiceRegistryBuilder().configure("hibernate.cfg.xml").build(); MetadataSources metadataSources = new MetadataSources(standardServiceRegistry); Metadata metadata = metadataSources.getMetadataBuilder().build(); sessionFactory = metadata.getSessionFactoryBuilder().build(); } } catch (Exception e) { if (standardServiceRegistry != null) { StandardServiceRegistryBuilder.destroy(standardServiceRegistry); } } } public static SessionFactory getSessionFactory() { return sessionFactory; } } |
hibernate.cfg.xml
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | <?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="connection.url">jdbc:mysql://localhost:3306/dbsms?createDatabaseIfNotExist=true </property> <property name="connection.driver_class">com.mysql.cj.jdbc.Driver </property> <property name="connection.username">root</property> <property name="connection.password">root123</property> <property name="dialect">org.hibernate.dialect.MySQL57Dialect</property> <property name="hibernate.hbm2ddl.auto">update</property> </session-factory> </hibernate-configuration> |
I have attached the video link below. which will do this tutorials step by step.
