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Thread: saving xml file

  1. #1
    Junior Member
    Join Date
    May 2010
    Thanked 0 Times in 0 Posts

    Default saving xml file

    hello everyone
    this code should read xml file , edit it and return the new nodes to the same file ...
    It doesn't work ...
    please any help?
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.xml.parsers.*;
    import org.w3c.dom.*;
    import javax.xml.transform.*;
    import javax.xml.transform.dom.*;
    import javax.xml.transform.stream.*;
    import java.io.*;
    public class Register extends HttpServlet{
        static void toXML(Document doc,PrintWriter o)
                TransformerFactory xf = TransformerFactory.newInstance();
                Transformer xformer = xf.newTransformer();
               // xformer.setOutputProperty(OutputKeys.METHOD, "xml");
                //xformer.setOutputProperty(OutputKeys.INDENT, "yes");
                //xformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
                //Result out = new StreamResult(new OutputStreamWriter(System.out,"UTF-8"));
                DOMSource source = new DOMSource(doc);
                StreamResult result = new StreamResult(System.out);
                xformer.transform(source, result);             
            catch (TransformerConfigurationException tce) {
                // Error generated by the parser
                System.out.println ("* Transformer Factory error");
                System.out.println("  " + tce.getMessage() );
                // Use the contained exception, if any
                Throwable x = tce;
                if (tce.getException() != null)
                x = tce.getException();
            catch (TransformerException te) {
                // Error generated by the parser
                System.out.println ("* Transformation error");
                System.out.println("  " + te.getMessage() );
                // Use the contained exception, if any
                Throwable x = te;
                if (te.getException() != null)
                    x = te.getException();
            catch(Exception exception)
        public void doGet(HttpServletRequest request , HttpServletResponse response)
                throws IOException , ServletException{
            PrintWriter out = response.getWriter();
                out.println("<html><body background=\"images/backG.GIF\" >");
                out.println("<basefont face=\"comic sans ms\" color=\" #7429C7\" />");
                 String param_name = request.getParameter("name");       
                DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
                DocumentBuilder builder = builderFactory.newDocumentBuilder();
                Document document = builder.parse("F:/users.xml");
                 Element rootElement = document.getDocumentElement();
                 NodeList users=  rootElement.getElementsByTagName("user");
                 Element User=  (Element) document.getElementsByTagName("Users").item(0);
                 char x = 'n';
                 for(int i=0; i<users.getLength();i++)
                     Element question_element = (Element) users.item(i);
                      String attribute_name = question_element.getAttribute("name");
                          x = 'y';
                 if(x == 'y')
                     out.println("This Account Is Already Exists .... Try another name please");
                     Element new_child  = document.createElement("user");
                     new_child.setAttribute("name", param_name);            
                     new_child.setAttribute("type", "student");
                     //NodeList mm = User.getElementsByTagName("user");
                     toXML(document, out);
            catch(Exception e) {
                String errorMessage ="Error making root node: " + e;
      public  void doPost(HttpServletRequest request , HttpServletResponse response)throws IOException , ServletException
            doGet(request, response);
    thanx anyway

  2. #2
    Join Date
    Jan 2010
    Thanked 0 Times in 0 Posts

    Default Re: saving xml file

    what's the error?

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