Java dom4j XML Usage Summary

1. Create a new XML document:

DocumentDoc= Documenthelper. createdocument();Element root = Doc.addelement ("OCS");Root.addelement ("Header");Element BODY = root.addelement ("Body");Element Fontnode = body.addelement ("Font");Fontnode.addattribute ("Size", "9");System. out. println (Root.asxml ()); 2. Open an existing XML document (import from a string):           Document doc = Documenthelper. ParseText(XMLSTR);node node = doc.selectsinglenode ( "Ocs/body/font");              if(Node instanceofElement)            {element pnode = (element) node; Attribute attr = Pnode.attribute ("Size");System. out. println (Attr.asxml ());            } XPath is built into the dom4j, so you canAccess the path string as XPath in selectSingleNode, note that the Jaxen-1.1.1.jar package needs to be referenced, otherwise selectSingleNode will produce an exception and return null; 3. Open an existing document (import from file):          Saxreader Saxreader = NewSaxreader ();Document document = Saxreader.read ( xmlfile); 4. Write the document to the file:           Try            {XMLWriter output = NewXMLWriter ( NewFileWriter ( NewFile (xmlfile ));Output.write (DOC);output.close ();            } Catch(IOException e)            {System. out. println (E.getmessage ());            }

Java dom4j XML Usage Summary