executer première jpa

**minooo** · 11/04/2013, 11h50

bonjour,

je débute avec jpa et je ne suis pas arrivé a générer mon entité en exécutant la classe principale main

je vous montre l'entité

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import java.io.Serializable;
import java.lang.Long;
import java.lang.String;
import javax.persistence.*;
public class Formation implements Serializable {
	private Long id;
	private String theme;
	private static final long serialVersionUID = 1L;
 
	public Formation() {
		super();
	}   
	public Long getId() {
		return this.id;
	}
 
	public void setId(Long id) {
		this.id = id;
	}   
	public String getTheme() {
		return this.theme;
	}
 
	public void setTheme(String theme) {
		this.theme = theme;
	}
 
}

et la classe principale

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import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;
 
 
public class DemoJpa {
public static void main(String[] args) {
EntityManagerFactory emf=Persistence.createEntityManagerFactory("demojpa");
EntityManager em = emf.createEntityManager();
EntityTransaction tx = em.getTransaction();
tx.begin();
Formation formation= new  Formation();
tx.commit();
em.close();
emf.close();
}
}

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<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
	<persistence-unit name="demojpa">
 
	<properties>
            <property name="hibernate.archive.autodetection" value="class" />
            <!-- <property name="hibernate.show_sql" value="true" /> -->
            <property name="hibernate.format_sql" value="true" />
 
            <!-- Configuration de la  BDD -->
            <property name="hibernate.connection.driver_class" value="oracle.jdbc.OracleDriver" />
            <property name="hibernate.connection.url" value="jdbc:oracle:thin:@localhost:1521:FIN" />
            <property name="hibernate.connection.username" value="DO" />
            <property name="hibernate.connection.password" value="DO" />
 
            <!-- Spécifie le 'dialecte' SQL utilisé pour communiquer avec la BDD -->
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
             <!-- Indique a Hibernate de (re-)créer la BDD au lancement de l'application -->
            <property name="hibernate.hbm2ddl.auto" value="create" />
        </properties>
	</persistence-unit>
</persistence>

une fois lancer run une fenêtre message d'erreur

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Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named demojpa
	at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:69)
	at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
	at DemoJpa.main(DemoJpa.java:10)

merci d'avance

**minooo** · 11/04/2013, 17h12

j'ai essayé de résoudre problème j'ai message d'erreur

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[EL Info]: 2013-04-11 15:11:39.808--ServerSession(14074220)--EclipseLink, version: Eclipse Persistence Services - 2.4.1.v20121003-ad44345
[EL Severe]: ejb: 2013-04-11 15:11:39.824--ServerSession(14074220)--Exception [EclipseLink-4021] (Eclipse Persistence Services - 2.4.1.v20121003-ad44345): org.eclipse.persistence.exceptions.DatabaseException
Exception Description: Unable to acquire a connection from driver [null], user [null] and URL [null].  Verify that you have set the expected driver class and URL.  Check your login, persistence.xml or sessions.xml resource.  The jdbc.driver property should be set to a class that is compatible with your database platform
Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-4021] (Eclipse Persistence Services - 2.4.1.v20121003-ad44345): org.eclipse.persistence.exceptions.DatabaseException
Exception Description: Unable to acquire a connection from driver [null], user [null] and URL [null].  Verify that you have set the expected driver class and URL.  Check your login, persistence.xml or sessions.xml resource.  The jdbc.driver property should be set to a class that is compatible with your database platform
	at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:602)
	at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:186)
	at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:278)
	at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:304)
	at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:282)
	at mus.main(mus.java:13)
Caused by: Exception [EclipseLink-4021] (Eclipse Persistence Services - 2.4.1.v20121003-ad44345): org.eclipse.persistence.exceptions.DatabaseException
Exception Description: Unable to acquire a connection from driver [null], user [null] and URL [null].  Verify that you have set the expected driver class and URL.  Check your login, persistence.xml or sessions.xml resource.  The jdbc.driver property should be set to a class that is compatible with your database platform
	at org.eclipse.persistence.exceptions.DatabaseException.unableToAcquireConnectionFromDriverException(DatabaseException.java:376)
	at org.eclipse.persistence.sessions.DefaultConnector.connect(DefaultConnector.java:91)
	at org.eclipse.persistence.sessions.DatasourceLogin.connectToDatasource(DatasourceLogin.java:162)
	at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:685)
	at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:215)
	at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:542)
	... 5 more

**minooo** · 11/04/2013, 17h23

JE VOUS MONTRE FICHIER PERSISTENCE.XML

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<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
	<persistence-unit name="test">
		<class>Diplome</class>
		<properties>
         <property name="toplink.jdbc.url" value="jdbc:oracle:thin:@10.133.0.25:1521:FIN"/>
        <property name="toplink.jdbc.user" value="DEVRTO"/>
        <property name="toplink.jdbc.driver" value="oracle.jdbc.driver.OracleDriver"/>
        <property name="toplink.jdbc.password" value="DEVRTO"/>
       </properties>
	</persistence-unit>
</persistence>

executer première jpa

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