Anyone have example to read and write XML to/from file

Question

I am writing a swing utility and need to save and read data in XML. I have looked around google, but the examples are just confusing me.
Jonathan

Answer 1

Do these xml docs have dtd's? And specific DOM implementation needs or just a custom xml?
I have some examples in http://cvs.sourceforge.net/viewcvs.py/mathml-x/mathml-x/src/com/neuralworks/physics/Academy.java?view=markup
follow openMenuItemActionPerformed and openFEMMLDocument(String filePath). Look for DocumentBuilder
            DocumentBuilderFactory factory =
            DocumentBuilderFactory.newInstance();
/*            factory.setAttribute("element.factory",
                                 ELEMENT_FACTORY);
            factory.setAttribute("attribute.factory",
                                 ATTR_FACTORY);
            DocumentBuilder builder = factory.newDocumentBuilder();
            //builder.setEntityResolver(new X3DEntityResolver());
            //builder.setErrorHandler(new X3DErrorHandler());
            femDoc = findXMLFile(builder, filePath);
            org.w3c.dom.Element docElement=femDoc.getDocumentElement();
            javax.swing.tree.DefaultMutableTreeNode dmtn=new javax.swing.tree.DefaultMutableTreeNode("FEMML");
            javax.swing.tree.DefaultMutableTreeNode svgChild=new javax.swing.tree.DefaultMutableTreeNode(docElement.getNodeName());
            //System.out.println(svgDocument.getTitle()+" nv "+svgSVGElement.getNodeValue());
            //recurseDOM2TreeNodes(svgChild, docElement.getChildNodes());
            dmtn.add(svgChild);
            JTree tree=new JTree(new javax.swing.tree.DefaultTreeModel(dmtn));
            tree.setRootVisible(true);
            tree.setShowsRootHandles(true);
            tree.setEditable(true);
            //try
                //X3DTreeAdapter x3dTreeAdapter=new X3DTreeAdapter(x3dDTDParser.parse());
                //org.web3d.x3d.dom.swing.DOMTreeCellEditor domTreeCellEditor=new org.web3d.x3d.dom.swing.DOMTreeCellEditor();
                //tree.setCellEditor(domTreeCellEditor);
                //org.web3d.x3d.dom.swing.DOMTreeCellRenderer domTreeCellRenderer=new org.web3d.x3d.dom.swing.DOMTreeCellRenderer();
                //domTreeCellRenderer.addMouseListener(x3dTreeAdapter);
                //domTreeCellRenderer.addMouseMotionListener(x3dTreeAdapter);
                //tree.setCellRenderer(domTreeCellRenderer);
                //tree.addMouseListener(x3dTreeAdapter);
                //tree.addMouseMotionListener(x3dTreeAdapter);
                academicSplitPane.setLeftComponent(new JScrollPane(tree));Lot of commented out stuff I need to clean up. There are other examples of opening specific xml docs that have special DOM implementations; svg and mathml for example.
For saving I use xslt with an identity transform to go from an in memory DOM source to an xml document on disk.
Follow the saveAs(String filePath) method and the identity.xsl is http://cvs.sourceforge.net/viewcvs.py/mathml-x/mathml-x/stylesheets/identity.xsl?rev=1.2&view=markup