Olá,
Estou fazendo alguns exemplos de persistência e está me dando o seguinte erro:
Alguem poderia me ajudar??
Exception in thread “main” Local Exception Stack:
Exception [TOPLINK-4003] (Oracle TopLink Essentials - 2.0 (Build b58g-fcs (09/07/2007))): oracle.toplink.essentials.exceptions.DatabaseException
Exception Description: Configuration error. Class [org.apache.derby.jdbc.ClientDriver] not found.
at oracle.toplink.essentials.exceptions.DatabaseException.configurationErrorClassNotFound(DatabaseException.java:101)
at oracle.toplink.essentials.sessions.DefaultConnector.loadDriver(DefaultConnector.java:183)
at oracle.toplink.essentials.sessions.DefaultConnector.connect(DefaultConnector.java:9
at oracle.toplink.essentials.sessions.DatasourceLogin.connectToDatasource(DatasourceLogin.java:184)
at oracle.toplink.essentials.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:582)
at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:280)
at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:229)
at oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerFactoryImpl.getServerSession(EntityManagerFactoryImpl.java:93)
at oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:126)
at oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:120)
at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:91)
at teste.lib.TestaPersistencia.main(TestaPersistencia.java:25)
