请大家看一下这个错误，我不知道如何解决！！请高手务必帮忙，谢谢啦！！！
我使用的是apache ant 1.6.5 然后程序里面要装载jena 2.3 包，只是试着想读入一个OntModel，就出现问题了，如下：
OntModel m = ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM, null);
m.getDocumentManager().addAltEntry(
"http://www.w3.org/2001/sw/WebOnt/guide-src/food",
importURL);
m.read("http://www.w3.org/2001/sw/WebOnt/guide-src/food");
这是在一个叫做XCHIPS的软件中添加OWL importing/exporting 的功能
我才加了如上几句话，就出问题了：
Exception in thread "AWT-EventQueue-0" java.lang.NoSuchMethodError: org.apache.x
erces.parsers.SAXParser.<init>(Lorg/apache/xerces/xni/parser/XMLParserConfigurat
ion;)V
at com.hp.hpl.jena.rdf.arp.impl.RDFXMLParser$MySAXParser.<init>(RDFXMLPa
rser.java:55)
at com.hp.hpl.jena.rdf.arp.impl.RDFXMLParser.create(RDFXMLParser.java:82
)
at com.hp.hpl.jena.rdf.arp.JenaReader.<init>(JenaReader.java:76)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at com.hp.hpl.jena.rdf.model.impl.RDFReaderFImpl.getReader(RDFReaderFImp
l.java:101)
at com.hp.hpl.jena.rdf.model.impl.ModelCom.read(ModelCom.java:221)
at com.hp.hpl.jena.ontology.OntDocumentManager.findMetadata(OntDocumentM
anager.java:953)
at com.hp.hpl.jena.ontology.OntDocumentManager.initialiseMetadata(OntDoc
umentManager.java:912)
at com.hp.hpl.jena.ontology.OntDocumentManager.<init>(OntDocumentManager
.java:199)
at com.hp.hpl.jena.ontology.OntDocumentManager.<init>(OntDocumentManager
.java:181)
at com.hp.hpl.jena.ontology.OntDocumentManager.<init>(OntDocumentManager
.java:165)
at com.hp.hpl.jena.ontology.OntDocumentManager.getInstance(OntDocumentMa
nager.java:243)
at com.hp.hpl.jena.ontology.OntModelSpec.getDocumentManager(OntModelSpec
.java:317)
at com.hp.hpl.jena.ontology.impl.OntModelImpl.getDocumentManager(OntMode
lImpl.java:192)
at com.hp.hpl.jena.ontology.impl.OntModelImpl.<init>(OntModelImpl.java:1
63)
at com.hp.hpl.jena.ontology.impl.OntModelImpl.<init>(OntModelImpl.java:1
30)
at com.hp.hpl.jena.rdf.model.ModelFactory.createOntologyModel(ModelFacto
ry.java:385)
at XCHIPS.XCHIPS.doOWLImport(Unknown Source)
at XCHIPS.XCHIPS.actionPerformed(Unknown Source)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Sour
ce)
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2006/7/31 21:32:00
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求助，这种错误折腾死人了
