jfreechar 的问题，有经验的大侠请指教(100分)

在ＪＦＲＥＥＣＨＡＲ的网站ＤＯＷＮ下开发包，将其中ＬＩＢ目录下的gnujaxp.jar，
itext-1.4.3.jar，jcommon-1.0.5.jar，jfreechart-1.0.2.jar，jfreechart-1.0.2-
experimental.jar五个ＪＡＲ包放在工程的ＪＡＲＳ目录下，并在ＪＢＵＩＬＤＥＲ９中，
工程属性里对其进行引用，结果在引入gnujaxp.jar包的时候报错，ＴＯＭＣＡＴ报的错，
任何页面都不能打开．

不会贴图，嘿嘿，把错误文字贴出来，请谅解
Apache Tomcat/4.0.6 - HTTP Status 500 - Internal Server Errortype Exception reportmessage Internal Server Errordescription The server encountered an internal error (Internal Server Error) that prevented it from fulfilling this request.exception javax.servlet.ServletException: Servlet.init() for servlet debugjsp threw exception
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:946)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:655)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1027)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125)
at java.lang.Thread.run(Thread.java:536)
root cause java.lang.NoClassDefFoundError: org/xml/sax/ext/Attributes2
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1643)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:937)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1372)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1254)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
at gnu.xml.aelfred2.XmlReader.(XmlReader.java:67)
at gnu.xml.aelfred2.JAXPFactory$JaxpParser.(JAXPFactory.java:140)
at gnu.xml.aelfred2.JAXPFactory.setFeature(JAXPFactory.java:98)
at gnu.xml.dom.JAXPFactory.newDocumentBuilder(JAXPFactory.java:96)
at org.apache.jasper.parser.ParserUtils.parseXMLDocument(ParserUtils.java:198)
at org.apache.jasper.compiler.TldLocationsCache.processWebDotXml(TldLocationsCache.java:165)
at org.apache.jasper.compiler.TldLocationsCache.(TldLocationsCache.java:138)
at org.apache.jasper.EmbededServletOptions.(EmbededServletOptions.java:350)
at org.apache.jasper.servlet.JspServlet.init(JspServlet.java:265)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:918)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:655)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1027)