计算机科学论坛--求助：这段程序错哪了？

贴子主题：求助：这段程序错哪了？

本主题类别:

请教各位高手，我在Eclipse里运行下面这段程序，为什么总是“无法打开本体文件，程序将终止”，怎么错了呢？
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;

import com.hp.hpl.jena.query.Query;
import com.hp.hpl.jena.query.QueryExecution;
import com.hp.hpl.jena.query.QueryExecutionFactory;
import com.hp.hpl.jena.query.QueryFactory;
import com.hp.hpl.jena.query.QuerySolution;
import com.hp.hpl.jena.query.ResultSet;
import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.rdf.model.ModelFactory;
import com.hp.hpl.jena.reasoner.Reasoner;
import com.hp.hpl.jena.reasoner.rulesys.GenericRuleReasoner;
import com.hp.hpl.jena.reasoner.rulesys.Rule;

public class Jena {

/**
* @param args
*/
public String filepath="d\\ktbg\\R9.rdf-xml.owl";
Model model;
public Jena(){
      model=ModelFactory.createDefaultModel();
      loadmodel();
}
    public boolean runQuery(String queryStr){
     Query query=QueryFactory.create(queryStr);
     QueryExecution qe=QueryExecutionFactory.create(query,model);
     ResultSet results=qe.execSelect();
     while (results.hasNext()){
      QuerySolution soln=results.nextSolution();
      System.out.print(soln.get("s").toString());
      System.out.print("\t");
      System.out.print(soln.get("p").toString());
      System.out.print("\t");
      System.out.print(soln.get("o").toString());
      System.out.println("\n");
      }
     results =null;
     qe.close();
     return true;
    }
    private void loadmodel(){
     InputStreamReader in;
     try{
      FileInputStream file = new FileInputStream(filepath);
      in=new InputStreamReader(file,"UTF-8");
      model.read(in,null);
      String rule = "[owl:inverseOf: (?pa owl:inverseOf ?pb) (?a ?pa ?b)->(?b ?pb ?a)]";
      Reasoner reasoner = new GenericRuleReasoner(Rule.parseRules(rule));
      model = ModelFactory.createInfModel(reasoner, model);
      in.close();
     }catch (FileNotFoundException e){
      System.out.println("无法打开本体文件，程序将终止");
      System.exit(0);
     }catch (IOException e){
         e.printStackTrace();
         System.exit(0);
     }
    }
    public static void main(String[] args){
     Jena myLearn = new Jena();
     String queryStr = "Select ?s ?p ?o where{?s ?p ?o.}";
     myLearn.runQuery(queryStr );
    }
}
谢谢指教！


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