现在我想把里面所有的http://www.w3.org/2002/07/owl#DatatypeProperty改成http://www.w3.org/2002/07/owl#DatatypeProperty111111
程序如下：
package example;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.rdf.model.ModelFactory;
import com.hp.hpl.jena.rdf.model.Property;
import com.hp.hpl.jena.rdf.model.RDFNode;
import com.hp.hpl.jena.rdf.model.Resource;
import com.hp.hpl.jena.rdf.model.Statement;
import com.hp.hpl.jena.rdf.model.StmtIterator;

public class Ev {
 public static void main(String[] args) {
  
  Model model=ModelFactory.createDefaultModel();
  StmtIterator iter;
  
  String no="http://www.w3.org/2002/07/owl#DatatypeProperty111111";
  Resource type=model.getResource(no);
     try

     {   model.read(new FileInputStream("D:\\Animal.owl"),""); }

     catch(IOException ioe)

     {

            System.err.println(ioe.toString());

     }
 iter = model.listStatements();
while (iter.hasNext()) {
    Statement stmt      = iter.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
    if(object.toString().equals("http://www.w3.org/2002/07/owl#DatatypeProperty"))
        object=type;
    System.out.print(subject.toString());
    System.out.print(" " + predicate.toString() + " ");
    System.out.print(" " + object.toString() + " ");

    System.out.println(" .");
}
try

{
  model.write(new FileOutputStream("D:\\Animals.owl")) ;
      

}

catch(IOException ioe)

{ System.err.println(ioe.toString()); }

 }}
显示Statement的时候没有问题，但是写到D:\\Animals.owl时，却没有完成修改。不知道为什么？还请各位帮忙，多谢！