异常创建xml文件

Question

我正在尝试创建一个xml文件。当我创建该文件时，出现此错误。我真的不知道它是什么。这是一个非常奇怪的错误。文件创建正确，但是里面没有任何内容。

Exception in thread "AWT-EventQueue-0" java.lang.AbstractMethodError: gnu.xml.dom.DomDocument.getXmlStandalone()Z
    at com.sun.org.apache.xalan.internal.xsltc.trax.DOM2TO.setDocumentInfo(DOM2TO.java:377)
    at com.sun.org.apache.xalan.internal.xsltc.trax.DOM2TO.parse(DOM2TO.java:131)
    at com.sun.org.apache.xalan.internal.xsltc.trax.DOM2TO.parse(DOM2TO.java:98)
    at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transformIdentity(TransformerImpl.java:683)
    at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:727)
    at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:340)
    at org.w3c.jigmonitor.controller.Controller.writePerformancesXmlFile(Controller.java:191)
    at org.w3c.jigmonitor.controller.Controller.actionPerformed(Controller.java:68)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
    at java.awt.Component.processMouseEvent(Component.java:6505)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
    at java.awt.Component.processEvent(Component.java:6270)
    at java.awt.Container.processEvent(Container.java:2229)
    at java.awt.Component.dispatchEventImpl(Component.java:4861)
    at java.awt.Container.dispatchEventImpl(Container.java:2287)
    at java.awt.Component.dispatchEvent(Component.java:4687)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
    at java.awt.Container.dispatchEventImpl(Container.java:2273)
    at java.awt.Window.dispatchEventImpl(Window.java:2719)
    at java.awt.Component.dispatchEvent(Component.java:4687)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:703)
    at java.awt.EventQueue.access$000(EventQueue.java:102)
    at java.awt.EventQueue$3.run(EventQueue.java:662)
    at java.awt.EventQueue$3.run(EventQueue.java:660)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
    at java.awt.EventQueue$4.run(EventQueue.java:676)
    at java.awt.EventQueue$4.run(EventQueue.java:674)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:673)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)

这是我用来创建xml文件的代码：

DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
                    DocumentBuilder docBuilder = docFactory.newDocumentBuilder();

                    Document doc = docBuilder.newDocument();
                    Element rootElement = doc.createElement("performances");
                    doc.appendChild(rootElement);

                    Attr attr = doc.createAttribute("date");
                    attr.setValue(dateFormat.format(cal.getTime()).toString());
                    rootElement.setAttributeNode(attr);

                    //Uptime
                    Element uptime = doc.createElement("uptime");
                    rootElement.appendChild(uptime);

                    Element days = doc.createElement("days");
                    days.appendChild(doc.createTextNode(new Long(duptime).toString()));
                    uptime.appendChild(days);

                    Element hours = doc.createElement("hours");
                    hours.appendChild(doc.createTextNode(new Long(huptime).toString()));
                    uptime.appendChild(hours);

                    Element minutes = doc.createElement("minutes");
                    minutes.appendChild(doc.createTextNode(new Long(muptime).toString()));
                    uptime.appendChild(minutes);

                    Element seconds = doc.createElement("seconds");
                    seconds.appendChild(doc.createTextNode(new Long(suptime).toString()));
                    uptime.appendChild(seconds);

                    //TotalHitCount
                    Element totalhitcount = doc.createElement("totalhitcount");
                    totalhitcount.appendChild(doc.createTextNode(new Long(stats.gettotal_hit_count()).toString()));
                    rootElement.appendChild(totalhitcount);

                    //EmittedBytes
                    Element emittedbytes = doc.createElement("emittedbytes");
                    emittedbytes.appendChild(doc.createTextNode(new Long(stats.getemitted_bytes()).toString()));
                    rootElement.appendChild(emittedbytes);

                    //Avghitsec
                    Element avghitsec = doc.createElement("avghitsec");
                    avghitsec.appendChild(doc.createTextNode(new Float(stats.getavg_hit_sec()).toString()));
                    rootElement.appendChild(avghitsec);

                    //Avgbyteshit
                    Element avgbyteshit = doc.createElement("avgbyteshit");
                    avgbyteshit.appendChild(doc.createTextNode(new Long(stats.getavgbytes_hit()).toString()));
                    rootElement.appendChild(avgbyteshit);

                    //Avgbps
                    Element avgbps = doc.createElement("avgbps");
                    avgbps.appendChild(doc.createTextNode(new Long(stats.getavgbps()).toString()));
                    rootElement.appendChild(avgbps);

                    //Total Threads
                    Element totalthreads = doc.createElement("totalthreads");
                    totalthreads.appendChild(doc.createTextNode(new Long(stats.gettotal_threads()).toString()));
                    rootElement.appendChild(totalthreads);

                    //Idle Threads
                    Element idlethreads = doc.createElement("idlethreads");
                    idlethreads.appendChild(doc.createTextNode(new Long(stats.getidle_threads()).toString()));
                    rootElement.appendChild(idlethreads);

                    TransformerFactory transformerFactory = TransformerFactory.newInstance();
                    Transformer transfomer = transformerFactory.newTransformer();
                    DOMSource source = new DOMSource(doc);
                    StreamResult result = new StreamResult(new File("/home/mazzy/Scrivania/perfor_"+dateFormat.format(cal.getTime()).toString()+".xml"));

                    transfomer.transform(source, result);

我在transfomer method中遇到了异常。知道我得到了什么错误吗？

Answer 1

这是某种配置问题，是由于您在编译代码时与在运行时在类路径上的代码不同而在类路径上使用了不同的JAR所致。