Hibernate Java Config Versus Xml

Question

I am new to hibernate and I don't fully understand how to choose between java configuration and xml in hibernate config file? Tutorials that I have watched seem to be out of date. So my question is what is the best and most up to date way of configuring a model to hibernate.

The following is my current approach which seems to be the only one working for me:

<hibernate-configuration>
<session-factory>


<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/mydatabase</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">password</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.pool_size">10</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQL57InnoDBDialect</property>

<property name="hibernate.show_sql">true</property>
<property name="hibernate.format_sql">true</property>
<property name="hibernate.use_sql_comments">true</property>
<property name="hbm2ddl.auto">update</property>
<property name="current_session_context_class">thread</property>
<property name="hibernate.enable_lazy_load_no_trans">true</property>

<!-- <property name="hibernate.generate_statistics">true</property> -->

I am configuring my model in a java file as shown below:

public class HibernateUtil {

private static SessionFactory sessionFactory = buildSessionFactory();

private static SessionFactory buildSessionFactory() {
    try {

        // Create your SessionFactory with mappings for every Entity in a specific package
        Configuration configuration = new Configuration();
        configuration.configure();
        configuration.addAnnotatedClass(PersonModel.class);

        ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
        SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);

        //SessionFactory sessionFactory = new Configuration().configure("hibernate.cfg.xml").buildSessionFactory();

        return sessionFactory;

    } catch (Throwable ex) {
        // Make sure you log the exception, as it might be swallowed
        System.err.println("Initial SessionFactory creation failed." + ex);
        throw new ExceptionInInitializerError(ex);
    }
}

Is this the right way of doing it? or should it be done via XML file, if so can someone show me an example please?

Thanks in advance

if you use spring as well, you can pack the dataSource inside your application.xml and map your classes with jpa — XtremeBaumer, Jul 05 '17 at 12:09
For now I want to use Hibernate on its own easier to learn for me — Kris22, Jul 05 '17 at 12:10

Abass A · Answer 1 · 2017-07-05T14:57:33.773

0

Look at the following docs for examples:

For annotation mapping:

https://docs.jboss.org/hibernate/stable/annotations/reference/en/html_single/#entity-mapping

For xml mapping:

https://docs.jboss.org/hibernate/orm/3.3/reference/fr-FR/html/xml.html

Use of one of them it's up to you, for more details you can check this answer or this one

EDIT: mapping example in hibernate configuration file

<hibernate-configuration>
  <session-factory>
    <mapping package="test.animals"/>
    <mapping class="test.Flight"/>
    <mapping class="test.Sky"/>
    <mapping class="test.Person"/>
    <mapping class="test.animals.Dog"/>
    <mapping resource="test/animals/orm.xml"/>
  </session-factory>
</hibernate-configuration>

edited Jul 05 '17 at 14:57

answered Jul 05 '17 at 13:00

Abass A

713
6
14

I am using annotations in my model class, but I still need to use the following code: Configuration configuration = new Configuration(); configuration.configure(); configuration.addAnnotatedClass(PersonModel.class); Is there an alternative or is this the right way to do it? Thanks in advance – Kris22 Jul 05 '17 at 14:34
@Kris22 Yes this way is correct but you can alternatively add your mapping into hibernate configuration file with mapping tag ex : `` and thus you dont need `configuration.addAnnotatedClass(PersonModel.class);` in your java – Abass A Jul 05 '17 at 14:54
@Kris22 i've updated my answer with an example of xml config – Abass A Jul 05 '17 at 15:00
Thank you this is very useful – Kris22 Jul 05 '17 at 15:05
@Kris22 Among advantages of Java config over xml i can quote that with java config you can benefit from type safety and this can save you time , also refactoring and search will be more easier. – Abass A Jul 05 '17 at 15:08
@Kris22 Also i realize that your question was more about hibernate java config versus xml config and not annotation versus xml mapping, if so feel free to approve my edit – Abass A Jul 05 '17 at 15:15

score 0 · Answer 2 · answered Jul 05 '17 at 15:53

0

This way you can scan all entity classes at once

SessionFactory sessionFactory = new LocalSessionFactoryBuilder(yourDataSource())
        .scanPackages("com.yourpackage.name")
        .addProperties(properties)
        .buildSessionFactory();

answered Jul 05 '17 at 15:53

Anurag

101
1
5

Hibernate Java Config Versus Xml

2 Answers2