编译Jena中的给的例子程序Tutorial01.java，能编译通过。但是运行时异常，请大家指点。。。

//===Tutorial01.java===
package jena.examples.rdf ;

import com.hp.hpl.jena.rdf.model.*;
import com.hp.hpl.jena.vocabulary.*;

/** Tutorial 1 creating a simple model
*/

public class Tutorial01 extends Object {
    // some definitions
    static String personURI    = "http://somewhere/JohnSmith";
    static String fullName     = "John Smith";
    
      public static void main (String args[]) {
          System.out.println("=== 111 ====");
        // create an empty model
        Model model = ModelFactory.createDefaultModel();
         System.out.println("=== 222 ====");

       // create the resource
       Resource johnSmith = model.createResource(personURI);

      // add the property
      johnSmith.addProperty(VCARD.FN, fullName);
      System.out.println("=== Program End====");
      }
}

在执行ModelFactory.createDefaultModel()时有异常，运行时出错信息：
run:
=== 111 ====
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
        at com.hp.hpl.jena.rdf.model.impl.PropertyImpl.<clinit>(PropertyImpl.java:58)
        at com.hp.hpl.jena.enhanced.BuiltinPersonalities.<clinit>(BuiltinPersonalities.java:28)
        at com.hp.hpl.jena.rdf.model.impl.ModelCom.<init>(ModelCom.java:51)
        at com.hp.hpl.jena.rdf.model.ModelFactory.createDefaultModel(ModelFactory.java:119)
        at com.hp.hpl.jena.rdf.model.ModelFactory.createDefaultModel(ModelFactory.java:113)
        at jena.examples.rdf.Tutorial01.main(Tutorial01.java:23)
Java Result: 1
生成成功（总时间：2 秒）

望指点迷津。。。