Bonjour,
Je suis sous eclipse, et ne parviens pas à configurer correctement mes fichiers de conf. Enfin, je crois, parce que je vois pas d'ou vient l'erreur

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log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" org.hibernate.exception.GenericJDBCException: Cannot open connection
	at org.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(ErrorCodeConverter.java:92)
	at org.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:80)
	at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
	at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
	at org.hibernate.jdbc.AbstractBatcher.openConnection(AbstractBatcher.java:427)
	at org.hibernate.jdbc.JDBCContext.connect(JDBCContext.java:149)
	at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:95)
	at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:49)
	at org.hibernate.transaction.JDBCTransactionFactory.beginTransaction(JDBCTransactionFactory.java:19)
	at org.hibernate.jdbc.JDBCContext.beginTransaction(JDBCContext.java:212)
	at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1015)
	at gestion.don.Donnees.getByParking(DonneesReservation.java:36)
	at Tests.TestNoParking.main(TestNoParking.java:13)
Caused by: java.sql.SQLException: Exception d'E/S: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=169869568)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
	at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
	at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
	at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:333)
	at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:404)
	at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:468)
	at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:314)
	at java.sql.DriverManager.getConnection(Unknown Source)
	at java.sql.DriverManager.getConnection(Unknown Source)
	at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:110)
	at org.hibernate.jdbc.AbstractBatcher.openConnection(AbstractBatcher.java:424)
	... 8 more
J'avais pas la bonne syntaxe pour la connex.