<h:form>
<p:fileUpload fileUploadListener="#{schweizerDAO.upload}"
            mode="advanced" dragDropSupport="true"
            update="message hochgeladen myForm" sizeLimit="6000000"
            fileLimit="1" allowTypes="/(.|/)(csv)$/" label="Hinzufügen"
            cancelLabel="Abbrechen" fileLimitMessage="Limit erreicht"
            uploadLabel="hochladen"
            invalidFileMessage="Falsches Datenformat. Nur CSV erlaubt"
            invalidSizeMessage="Datei ist zu groß" />
</h:form>

<persistence-unit name="Stack">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <properties>
        <property name="hibernate.dialect" value="org.hibernate.dialect.OracleDialect" />
        <property name="hibernate.connection.driver_class" value="oracle.jdbc.OracleDriver" />
        <property name="hibernate.connection.url" value="jdbc:oracle:thin:@xxxxxxxx:1521:XE" />
        <property name="hibernate.connection.password" value="xxxxxx" />
        <property name="hibernate.connection.username" value="xxxxxx" />
        <property name="hibernate.show_sql" value="true" />
        <property name="hibernate.format_sql" value="true" />
        <property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider" />
        <property name="hibernate.hbm2ddl.auto" value="update" />
    </properties>
</persistence-unit>