关闭设计器的时候报这个错，版主给看看，谢谢
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:373) at com.sun.org.apache.xalan.internal.xsltc.trax.DOM2TO.parse(DOM2TO.java:127) at com.sun.org.apache.xalan.internal.xsltc.trax.DOM2TO.parse(DOM2TO.java:94) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transformIdentity(TransformerImpl.java:662) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:708) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:313) at jatools.xml.XmlWriter.write(XmlWriter.java:32) at jatools.designer.config.Configuration.write(Configuration.java:88) at jatools.designer.config.Configuration.write(Configuration.java:82) at jatools.designer.Main$6.windowClosing(Main.java:223) at java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:332) at java.awt.Window.processWindowEvent(Window.java:1862) at javax.swing.JFrame.processWindowEvent(JFrame.java:279) at java.awt.Window.processEvent(Window.java:1820) at java.awt.Component.dispatchEventImpl(Component.java:4583) at java.awt.Container.dispatchEventImpl(Container.java:2099) at java.awt.Window.dispatchEventImpl(Window.java:2475) at java.awt.Component.dispatchEvent(Component.java:4413) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
