Java 无法分析来自资源hbm/xml/Items.hbm.xml和重复的类/实体映射bean.ItemTable的映射文档

这是我的第一个Hibernate应用程序。被困在这里两天了。我需要帮助。包裹上方视图：小写字母：包裹大写字母：类别

src->dao->OPERATIONS.javasrc->hbm.xml->items.hbm.xml

src->Hibernate.cfg.xml

public class Operations {

    public static void main(String [] args){

    Configuration cfg=new Configuration();
    cfg.configure("Hibernate.cfg.xml");
        SessionFactory sf=null;
        sf=cfg.configure().buildSessionFactory();
        Session sess=sf.openSession();
    if(sess==null)
            System.out.println("Session Object :  NULL:  "+sess);
        Transaction tx=sess.beginTransaction();
        ItemTable ob=new ItemTable();
        ob.setItemCode(1);
        ob.setItemName("ATTA");
        sess.save(ob);
        sess.flush();//generates SQL queries
        tx.commit();
        sess.close();
    }
}

Hibernate.cfg.xml文件

<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
        <property name="hibernate.connection.url">jdbc:Oracle:thin:@localhost:1521:xe</property>
        <property name ="hibernate.dialect">org.hibernate.dialect.OracleDialect</property>
        <property name="hibernate.connection.username">system</property>
        <property name="hibernate.connection.password">admin1234</property>
        <property name="show_sql">true</property>
        <property name="hibernate.connection.autocommit">false</property>
        <property  name="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
        <!-- To display the sql generated in console -->
        <property name="show_sql">true</property>
        <property name="format_sql">true</property>
        <property name="use_sql_comments">true</property>
        <!-- For JDBC transactions -->

        <mapping resource="hbm/xml/Items.hbm.xml"/> 
    </session-factory>
</hibernate-configuration>

oracle.jdbc.driver.OracleDriver
jdbc:Oracle:thin:@localhost:1521:xe
org.hibernate.dialen.oraclealent
系统
管理员1234
真的
假的
org.hibernate.transaction.jdbc事务工厂
真的
真的
真的

Items.hfm.xml文件

<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >

 <hibernate-mapping  auto-import ="true">
    <class name="bean.ItemTable" table ="items">
    <!-- Every class must have an Id(Primary Key) or Composite_Id -->
        <id name ="itemCode" column="ITEMCODE" type="integer">
            <generator class="assigned"></generator>
        </id>
        <property name="itemName" column="ITEMNAME" type="string"/>     
    </class>
 </hibernate-mapping>