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hibernate-tutorial2

Hibernate XML Mapping files (Obsolete !!! We will see in Tutorial 3 the mode "Hibernate Annotations")

contributions welcome Travis license

Description

A sample code to execute Queries under Hibernate ORM (not directly to sql)

  • JavaSE 8
  • Hibernate 5
  • Maven 4
  • MySQL 5

1. Database and tables

We will use the same database and table structure in Tutorial 1

2. Create maven project and add dependencies

<!-- MySQL connector --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>6.0.6</version> </dependency> <!-- Hibernate --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>5.2.11.Final</version> </dependency>

3. Create POJO (Plain Old Java Object) class

public class Product { private int id; private String name; private int price; // getters and setters here... }

4. Create the XML mapping file

<?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="net.isetjb.hibernatetutorial2.Product" table="product"> <meta attribute="class-description"> Add your class description here. </meta> <id name="id" type="int" column="id"> <generator class="native"/> </id> <property name="name" type="string"> <column name="name" length="255" not-null="true"/> </property> <property name="price" type="int"> <column name="price" not-null="true"/> </property> </class> </hibernate-mapping>

5. Create the hibernate config file 'hibernate.cfg.xml' (in ressources folder)

<?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="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/persist_db?useTimezone=true&amp;serverTimezone=UTC</property> <property name="hibernate.connection.username">root</property> <property name="hibernate.connection.password"></property> <property name="show_sql">true</property> <mapping file="src/main/java/net/isetjb/hibernatetutorial2/Product.hbm.xml"/> </session-factory> </hibernate-configuration>

6. Create HibernateUtil.java

Hibernate Utility class with a convenient method to get Session Factory.

7. Create main Application class

  • a class whith main method to test connection
  • implement CRUD operations

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Hibernate tutorial 2 : XML Mapping

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