JPA - CRIStAL

Cedric Dumoulin

Aperçu
Rappels
Contexte de Persistance et état des entités
Associations
Héritage
Classes embarquées
Langage de requêtes
JPA et Container JEE

Cours
Le cours de Laurent Guerin
Page du site
http://www.laurent-guerin.fr/jpa
Lien direct Cours-JPA-v1.2.pdf
http://www.laurent-guerin.fr/jpa/Cours-JPA-
v1.2.pdf?attredirects=0&d=1
Licences
Creative Commons (CC) : BY-NC-SA"
( cf http://creativecommons.org/licenses/ )

Rappels
@Entity
public class Person {
@Id
@GeneratedValue(strategy = GenerationType.TABLE)
private String id;
private String firstName;
private String lastName;
// ...
}
factory = Persistence
.createEntityManagerFactory(PERSISTENCE_UNIT_NAME);
EntityManager em = factory.createEntityManager();
// ...
em.getTransaction().begin();
Person person = new Person();
person.setFirstName("Jim_" + i);
person.setLastName("Knopf_" + i);
em.persist(person);
em.getTransaction().commit();
// ...
}
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" ...
<persistence-unit name="people" transaction-type="RESOURCE_LOCAL">
<class>de.vogella.jpa.eclipselink.model.Person</class>
<properties>
<property name="javax.persistence.jdbc.driver"
value="org.apache.derby.jdbc.EmbeddedDriver" />
<property name="javax.persistence.jdbc.url"
value="jdbc:derby:F:\temp\derby\db1;create=true" />
<!-- EclipseLink should create the database schema automatically -->
<property name="eclipselink.ddl-generation" value="drop-and-create-tables" />
<property name="eclipselink.ddl-generation.output-mode"
value="database" />
</properties>
</persistence-unit>
</persistence>
DB