Create SessionFactory in Hibernate5 without hibernate.cfg.xml

In this post, we will learn how to create SessionFactory in Hibernate 5. Here we are going to use MySQL database but you feel free to modify HibernateUtil.java to use other database as well.

Technologies and tools used for this application are –

Hibernate 5.2.11.Final
Eclipse Mars.2 (4.5.0)
Maven 3.5.0
JavaSE 1.8
MySQL 5.5.57

Project Structure
Review the following project structure.

So let us proceed to write a hibernate application, which will print the version of the MySQL database using a client program(ClientTest .java).

Step 1 – Create a maven project

Refer below link if you don’t know how to create Maven project in eclipse:
How to create Maven project

Step 2 – Add jar dependencies to pom.xml

Below is the pom.xml file and add required Hibernate and MySQL connector dependencies to it.

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.infotech</groupId>
  <artifactId>HiberbateSessionFactoryCreationWithoutConfigFile</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <!-- MySQL connector dependency -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>6.0.5</version>
    </dependency>
    <!-- Hibernate 5.2.11 Final dependency-->
    <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-core</artifactId>
      <version>5.2.11.Final</version>
    </dependency>
  </dependencies>

  <build>
    <sourceDirectory>src/main/java</sourceDirectory>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.5.1</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

<groupId>com.infotech</groupId>

<artifactId>HiberbateSessionFactoryCreationWithoutConfigFile</artifactId>

<version>0.0.1-SNAPSHOT</version>

<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

</properties>

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>

</dependency>

<groupId>org.hibernate</groupId>

<artifactId>hibernate-core</artifactId>

<version>5.2.11.Final</version>

</dependency>

</dependencies>

<build>

<artifactId>maven-compiler-plugin</artifactId>

</configuration>

</plugin>

</plugins>

</build>

</project>

Step 3 – Hibernate utility class which is responsible to provide SessionFactory

Create a class named as HibernateUtil.java as below:

package com.infotech.util;

import java.util.HashMap;
import java.util.Map;

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;
/**
 * @author kishan Kumar
 */
public class HibernateUtil {
	private static StandardServiceRegistry standardServiceRegistry;
	private static SessionFactory sessionFactory;

	static {
		// Creating StandardServiceRegistryBuilder 
		StandardServiceRegistryBuilder registryBuilder = new StandardServiceRegistryBuilder();
		
		// Hibernate settings which is equivalent to hibernate.cfg.xml's properties
		Map<String, String> dbSettings = new HashMap<>();
		dbSettings.put(Environment.URL, "jdbc:mysql://localhost:4406/test");
		dbSettings.put(Environment.USER, "root");
		dbSettings.put(Environment.PASS, "root");
		dbSettings.put(Environment.DRIVER, "com.mysql.jdbc.Driver");
		dbSettings.put(Environment.DIALECT, "org.hibernate.dialect.MySQLDialect");

		// Apply database settings
		registryBuilder.applySettings(dbSettings);
		// Creating registry
		standardServiceRegistry = registryBuilder.build();
		// Creating MetadataSources
		MetadataSources sources = new MetadataSources(standardServiceRegistry);
		// Creating Metadata
		Metadata metadata = sources.getMetadataBuilder().build();
		// Creating SessionFactory
		sessionFactory = metadata.getSessionFactoryBuilder().build();
	}
	//Utility method to return SessionFactory
	public static SessionFactory getSessionFactory() {
		return sessionFactory;
	}
}

package com.infotech.util;

import java.util.HashMap;

import java.util.Map;

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;

/**

* @author kishan Kumar

public class HibernateUtil {

private static StandardServiceRegistry standardServiceRegistry;

private static SessionFactory sessionFactory;

static {

// Creating StandardServiceRegistryBuilder

StandardServiceRegistryBuilder registryBuilder = new StandardServiceRegistryBuilder();

// Hibernate settings which is equivalent to hibernate.cfg.xml's properties

Map<String, String> dbSettings = new HashMap<>();

dbSettings.put(Environment.URL, "jdbc:mysql://localhost:4406/test");

dbSettings.put(Environment.USER, "root");

dbSettings.put(Environment.PASS, "root");

dbSettings.put(Environment.DRIVER, "com.mysql.jdbc.Driver");

dbSettings.put(Environment.DIALECT, "org.hibernate.dialect.MySQLDialect");

// Apply database settings

registryBuilder.applySettings(dbSettings);

// Creating registry

standardServiceRegistry = registryBuilder.build();

// Creating MetadataSources

MetadataSources sources = new MetadataSources(standardServiceRegistry);

// Creating Metadata

Metadata metadata = sources.getMetadataBuilder().build();

// Creating SessionFactory

sessionFactory = metadata.getSessionFactoryBuilder().build();

}

//Utility method to return SessionFactory

public static SessionFactory getSessionFactory() {

return sessionFactory;

}

Step 4 – Create a main class and run application

Here is the Client class which print MYSQL version. which makes use of HibernateUtil,java to get SessionFactory Object

package com.infotech.client;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import com.infotech.util.HibernateUtil;

public class ClientTest {

	public static void main(String[] args) {
	    try(Session session = HibernateUtil.getSessionFactory().openSession()) {
			// Check MySQL database version
			String sql = "select version()";

			String result = (String) session.createNativeQuery(sql).getSingleResult();
			System.out.println("MySql Database Version is:::");
			System.out.println(result);
		} catch (HibernateException e) {
			e.printStackTrace();
		}
	  }
}

package com.infotech.client;

import org.hibernate.HibernateException;

import org.hibernate.Session;

import com.infotech.util.HibernateUtil;

public class ClientTest {

public static void main(String[] args) {

try(Session session = HibernateUtil.getSessionFactory().openSession()) {

// Check MySQL database version

String sql = "select version()";

String result = (String) session.createNativeQuery(sql).getSingleResult();

System.out.println("MySql Database Version is:::");

System.out.println(result);

} catch (HibernateException e) {

e.printStackTrace();

}

Output

That’s All about How to Create SessionFactory in Hibernate5 without hibernate.cfg.xml

In this post, we will learn how to create SessionFactory in Hibernate 5. Here we are going to use MySQL database but you feel free to modify HibernateUtil.java to use other database as well.

Step 1 – Create a maven project

Step 3 – Hibernate utility class which is responsible to provide SessionFactory

Step 4 – Create a main class and run application

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