计算机科学论坛--使用Jena API出现问题，急请大家帮助！

在使用Jena API时出现如下的错误，请大家帮忙，对于大文件老出现，不知怎么回事，另外谁有较大的本体文件，帮小弟传一下，不甚感激！
程序片断：
  String className = "oracle.jdbc.driver.OracleDriver";
  try{Class.forName (className); }
  catch(Exception ex){System.out.println(ex.toString());};

  //建立Jena数据库模型连接
                　　　　　String DB_URL = "jdbc:oracle:thin:@10.2.35.79:1521:myoracle"; // URL of database server
  String DB_USER = "scott"; // database user id
  String DB_PASSWD = "database"; // database password
  String DB = "Oracle"; // database type
               IDBConnection conn = new DBConnection (DB_URL,DB_USER,DB_PASSWD,DB );
                //Create a model in the database
  ModelMaker maker = ModelFactory.createModelRDBMaker(conn);
  ModelRDB model = (ModelRDB) maker.createModel("my",true);



  //建立带推理模型
  Model model1 = ModelFactory.createRDFSModel(model);
         　　String inputFileName = "wordnet_glossary-20010201.rdf";

      　　　  // 读文件
  try
  {

   InputStream in = rdfstore.class.getClassLoader().getResourceAsStream(inputFileName);
   model.begin();
          model.read(new InputStreamReader(in), "");
                 　　　　　model.commit();
   }
  catch (Exception ex)
   {
    System.err.println("Exception: "+ex) ;
    ex.printStackTrace(System.err) ;
    }

  StmtIterator iter1 = model1.listStatements();

  while (iter1.hasNext())
  {

       LinkedList spo = new LinkedList();          //定义一个三元组数组
       Statement stmt      = iter1.nextStatement();  // get next statement
       Resource  subject   = stmt.getSubject();     // get the subject
       Property  predicate = stmt.getPredicate();   // get the predicate
       RDFNode   object    = stmt.getObject();      // get the object

                  }

出现错误：急求帮助！

WARN [main] (ResultSetIterator.java:185) - Problem in iterator over db result set, op = selectStatement
java.lang.ClassCastException: oracle.jdbc.driver.OracleResultSetImpl
at com.hp.hpl.jena.db.impl.Driver_Oracle.IDtoLongObject(Driver_Oracle.java:321)
at com.hp.hpl.jena.db.impl.DriverRDB.IDtoString(DriverRDB.java:2131)
at com.hp.hpl.jena.db.impl.DriverRDB.IDtoLiteral(DriverRDB.java:2113)
at com.hp.hpl.jena.db.impl.DriverRDB.RDBLiteralStringToLiteralNode(DriverRDB.java:1733)
at com.hp.hpl.jena.db.impl.DriverRDB.RDBStringToNode(DriverRDB.java:1692)
at com.hp.hpl.jena.db.impl.PSet_TripleStore_RDB.extractTripleFromRowData(PSet_TripleStore_RDB.java:237)
at com.hp.hpl.jena.db.impl.ResultSetTripleIterator.extractRow(ResultSetTripleIterator.java:114)
at com.hp.hpl.jena.db.impl.ResultSetIterator.moveForward(ResultSetIterator.java:178)
at com.hp.hpl.jena.db.impl.ResultSetIterator.hasNext(ResultSetIterator.java:142)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:64)
at com.hp.hpl.jena.util.iterator.FilterIterator.hasNext(FilterIterator.java:43)
at com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:86)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:64)
at com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:86)
at com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:86)
at com.hp.hpl.jena.reasoner.rulesys.impl.TopLevelTripleMatchFrame.nextMatch(TopLevelTripleMatchFrame.java:50)
at com.hp.hpl.jena.reasoner.rulesys.impl.LPInterpreter.run(LPInterpreter.java:325)
at com.hp.hpl.jena.reasoner.rulesys.impl.LPInterpreter.next(LPInterpreter.java:187)
at com.hp.hpl.jena.reasoner.rulesys.impl.LPTopGoalIterator.moveForward(LPTopGoalIterator.java:71)
at com.hp.hpl.jena.reasoner.rulesys.impl.LPTopGoalIterator.next(LPTopGoalIterator.java:186)
at com.hp.hpl.jena.util.iterator.WrappedIterator.next(WrappedIterator.java:68)
at com.hp.hpl.jena.util.iterator.WrappedIterator.next(WrappedIterator.java:68)
at com.hp.hpl.jena.util.iterator.UniqueExtendedIterator.nextIfNew(UniqueExtendedIterator.java:61)
at com.hp.hpl.jena.util.iterator.UniqueExtendedIterator.hasNext(UniqueExtendedIterator.java:69)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:64)
at com.hp.hpl.jena.util.iterator.FilterIterator.hasNext(FilterIterator.java:43)
at com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:86)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:64)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:64)
at rdfstore.rdfstore.main(rdfstore.java:122)


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