Bonjour à tous,

J'ai crée un programme pour manipuler une ontologie (sur les relations Famille)

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import java.util.*;
 
import com.hp.hpl.jena.rdf.model.*;
 
/**
 * A small family tree held in a Jena Model
 */
public class FamilyModel {
 
  // Namespace declarations
  static final String familyUri = "http://family/";
  static final String relationshipUri = "http://purl.org/vocab/relationship/";
 
  // Jena model representing the family
  private Model model;
 
  /**
   * Creates a model and populates it with family members and their
   * relationships
   */
  private FamilyModel() {
 
    // Create an empty Model
    model = ModelFactory.createDefaultModel();
 
    // Create the types of Property we need to describe relationships
    // in the model
    Property childOf = model.createProperty(relationshipUri,"childOf");
    Property parentOf = model.createProperty(relationshipUri,"parentOf");
    Property siblingOf = model.createProperty(relationshipUri,"siblingOf");
    Property spouseOf = model.createProperty(relationshipUri,"spouseOf");
 
    // Create resources representing the people in our model
    Resource adam = model.createResource(familyUri+"adam");
    Resource beth = model.createResource(familyUri+"beth");
    Resource chuck = model.createResource(familyUri+"chuck");
    Resource dotty = model.createResource(familyUri+"dotty");
    Resource edward = model.createResource(familyUri+"edward");
    Resource fran = model.createResource(familyUri+"fran");
    Resource greg = model.createResource(familyUri+"greg");
    Resource harriet = model.createResource(familyUri+"harriet");
 
    // Add properties to describing the relationships between them
    adam.addProperty(siblingOf,beth);
    adam.addProperty(spouseOf,dotty);
    adam.addProperty(parentOf,edward);
    adam.addProperty(parentOf,fran);
 
    beth.addProperty(siblingOf,adam);
    beth.addProperty(spouseOf,chuck);
 
    chuck.addProperty(spouseOf,beth);
 
    dotty.addProperty(spouseOf,adam);
    dotty.addProperty(parentOf,edward);
    dotty.addProperty(parentOf,fran);
 
    // Statements can also be directly created ...
    Statement statement1 = model.createStatement(edward,childOf,adam);
    Statement statement2 = model.createStatement(edward,childOf,dotty);
    Statement statement3 = model.createStatement(edward,siblingOf,fran);
 
    // ... then added to the model:
    model.add(statement1);
    model.add(statement2);
    model.add(statement3);
 
    // Arrays of Statements can also be added to a Model:
    Statement statements[] = new Statement[5];
    statements[0] = model.createStatement(fran,childOf,adam);
    statements[1] = model.createStatement(fran,childOf,dotty);
    statements[2] = model.createStatement(fran,siblingOf,edward);
    statements[3] = model.createStatement(fran,spouseOf,greg);
    statements[4] = model.createStatement(fran,parentOf,harriet);
    model.add(statements);
 
    // A List of Statements can also be added
    List list = new ArrayList();
 
    list.add(model.createStatement(greg,spouseOf,fran));
    list.add(model.createStatement(greg,parentOf,harriet));
 
    list.add(model.createStatement(harriet,childOf,fran));
    list.add(model.createStatement(harriet,childOf,greg));
 
    model.add(list);
  }
 
  /**
   * Creates a FamilyModel and dumps the content of its RDF representation
   */
  public static void main(String args[]) {
 
    // Create a model representing the family
    FamilyModel theFamily = new FamilyModel();
 
    // Dump out a String representation of the model
    System.out.println(theFamily.model);
  }
}
Je n'ai aucune fautes dans ce programme, cependant quand je compile (sous Eclipse ou Commande) on m'affiche plein d'erreurs

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Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
	at com.hp.hpl.jena.rdf.model.impl.PropertyImpl.<clinit>(PropertyImpl.java:61)
	at com.hp.hpl.jena.enhanced.BuiltinPersonalities.<clinit>(BuiltinPersonalities.java:27)
	at com.hp.hpl.jena.rdf.model.impl.ModelCom.<init>(ModelCom.java:51)
	at com.hp.hpl.jena.rdf.model.ModelFactory.createDefaultModel(ModelFactory.java:125)
	at com.hp.hpl.jena.rdf.model.ModelFactory.createDefaultModel(ModelFactory.java:119)
	at FamilyModel.<init>(FamilyModel.java:25)
	at FamilyModel.main(FamilyModel.java:96)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
	at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
	... 7 more
MERCI d'avance pour vos réactions, car je ne comprend pourquoi il y a tant d'erreurs !!