无法加载类[oracle.jdbc.Driver.Oracle驱动程序]

Question

这是hibernate.cfg.xml：

    <!-- hibernate dialect -->
    <property name="hibernate.dialect">org.hibernate.dialect.OracleDialect</property>
    <property name="hibernate.connection.driver_class">oracle.jdbc.driver.Oracle    Driver</property>
    <property name="hibernate.connection.url">jdbc:oracle:thin:@localhost:1521:xe</property>
    <property name="hibernate.connection.username">system</property>
    <property name="hibernate.connection.password">oracle</property>
    <property name="transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>

    <!-- Automatic schema creation (begin) === -->
    <property name="hibernate.hbm2ddl.auto">none</property>

    <!-- Simple memory-only cache -->
    <property name="hibernate.cache.provider_class">org.hibernate.cache.HashtableCacheProvider</property>

    <!-- Enable Hibernate's automatic session context management -->
    <property name="current_session_context_class">thread</property>

    <!-- <property name="show_sql">true</property> -->  



        <mapping class="com.infy.EPP.entites.LoginEntity" />


</session-factory>

这是Hibernate实用程序文件：

public class HibernateUtility 
{

    private static final String CONFIGURATION_LOCATION = "com/infy/EPP/resources/hibernate.cfg.xml";
    private static SessionFactory sessionFactory = null;
    private static ServiceRegistry serviceRegistry;

    public synchronized static SessionFactory createSessionFactory() {
        if (sessionFactory == null) 
        {
            try {
                // Step1 : Loading the configuration details from
                // hibernate.cfg.xml
                Configuration configuration = new Configuration()
                        .configure(CONFIGURATION_LOCATION);
System.out.println("configuration in Utility=="+configuration); //---//syso1

                // Step2 : Creating ServiceRegistry using the
                // StandardServiceRegistryBuilder and Configuration defined in
                // Step 1

                serviceRegistry = new StandardServiceRegistryBuilder()
                        .applySettings(configuration.getProperties()).build();
                System.out.println("serviceRegistry=="+serviceRegistry); ---//syso 2

                // Step3 : Creating the SessionFactory using the Configuration
                // and serviceRegistry.

                sessionFactory = configuration
                        .buildSessionFactory(serviceRegistry);
                System.out.println("sessionFactory==="+sessionFactory);   ---//syso 3


            } 
            catch (Exception e) 
            {
            e.printStackTrace();
                EppLogger.logError("HibernateUtility",
                        "createSessionFactory", e.getMessage());
            }
        }

        return sessionFactory;
    }

}

public Login authorize(Login to) throws Exception 
    {
        LoginEntity le = null;
    SessionFactory sessionFactory = null;
        Session session = null;
        Login login =null;
        try {
            sessionFactory = HibernateUtility.createSessionFactory();
            session=sessionFactory.openSession();
            session.beginTransaction();
            le = (LoginEntity)session.get(LoginEntity.class, to.getUserId());
            if (le != null) 
            {
                 login = new Login();
                login.setPassword(le.getPassword());
                login.setRole(le.getRole());
                login.setStatus(le.getStatus());
                login.setUserId(le.getUserId());
            }
            session.getTransaction().commit();
            }
        catch (PersistenceException exception) {
            EppLogger.logError(this.getClass().getName(), "authorize",
                    exception.getMessage());
            throw new Exception("DAO.TECHNICAL_ERROR");
        }
        catch (Exception e) 
        {
            e.printStackTrace();
            EppLogger.logError(this.getClass().getName(), "authorize", e.getMessage());
            throw new Exception("DAO.TECHNICAL_ERROR");
        } 
        finally 
        {
            if(session!=null)
            {
            session.close();
            sessionFactory.close();
            }
        }
        return login;
    }

Answer 1

driver_class属性中似乎有空格。

<property name="hibernate.connection.driver_class">oracle.jdbc.driver.Oracle    Driver</property>

甚至错误消息都表明。

尝试移除空格

<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>