HI, I have already discussed here but did not find what I was looking for (http://groups.google.com/group/google-web-toolkit/browse_thread/ thread/e7a880a22a129bfa?hl=en).
For my web application I use GWT 2.1.0 with Eclipse 1.3.8 and App Engine. I would like to write the values obtained as a parameter (from the TextBox) in an XML file. I know that is not possible to write client-side file. But I think you can do in server-side. I set the RPC call (see the tutorial). I can not use the java.io.File class to write (because G App Engine does not provide for this class, I saw here: http://code.google.com/intl/it-IT/appengine/docs/java/jrewhitelist . html). But I can use classes to write to files as Transform and DOMSource .. This is my code in Server-side: package de.vogella.gwt.helloworld.server; import java.io.*; import org.w3c.dom.*; import org.w3c.dom.Document; import org.xml.sax.SAXException; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.*; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import de.vogella.gwt.helloworld.client.MyService; import com.google.gwt.user.server.rpc.RemoteServiceServlet; public class MyServiceImpl extends RemoteServiceServlet implements MyService { /* //implementazione del metodo funzionante public String testRPC(String message) { Date now = new Date(); String dtm = DateFormat.getTimeInstance(DateFormat.MEDIUM).format(now); return "Ecco il messaggio inviato '" + message +"' quando sono precisamente le : " + dtm; } */ //metodo che inserisce il nuovo iscritto public void creaXML(String nickname,String pass,String email2,String gio,String mes, String ann){ /* XML format (keywords are space delimited): <utenti> <--già presente <utente> <nick>...</nick> <psw>...</psw> <mail>...</mail> <datan> <gg>...</gg> <mm>...</mm> <aa>...</aa> </datan> </utente> </utenti> */ String dest = "utenti.xml"; Document doc = null; DocumentBuilder db = null; //Istanziazione di DocumentBuilderFactory DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); //Istanziazione di DocumentBuilder try{ db = dbf.newDocumentBuilder(); } catch(ParserConfigurationException pce){ System.err.println("Errore per DocumentBuilder"); } try { doc = db.parse("utenti.xml"); } catch (SAXException se) { // TODO Auto-generated catch block } catch (IOException ioe){ System.err.println(ioe); } Node root = doc.getDocumentElement(); //root=<utenti> Node utente = doc.createElement("utente"); root.appendChild(utente); Node nick = doc.createElement("nick"); Node Tnick = doc.createTextNode(nickname); nick.appendChild(Tnick); utente.appendChild(nick); Node password = doc.createElement("psw"); Node Tpass = doc.createTextNode(pass); password.appendChild(Tpass); utente.appendChild(password); Node email = doc.createElement("mail"); Node Tmail = doc.createTextNode(email2); email.appendChild(Tmail); utente.appendChild(email); Node datan = doc.createElement("datan"); utente.appendChild(datan); Node giorni = doc.createElement("gg"); Node Tgg = doc.createTextNode(gio); giorni.appendChild(Tgg); datan.appendChild(giorni); Node mesi = doc.createElement("mm"); Node Tmm = doc.createTextNode(mes); mesi.appendChild(Tmm); datan.appendChild(mesi); Node anni = doc.createElement("aa"); Node Taa = doc.createTextNode(ann); anni.appendChild(Taa); datan.appendChild(anni); System.out.println("ci sono"); try{ DOMSource sorgente = new DOMSource (doc); StreamResult sr = new StreamResult (dest); TransformerFactory tf = TransformerFactory.newInstance(); Transformer transf = tf.newTransformer(); transf.transform(sorgente,sr); } catch (TransformerConfigurationException tce) { System.out.println(tce.getMessage()); } catch (TransformerException te) { System.out.println(te.getMessage()); } } } If I start the application I have this error: javax.servlet.ServletContext log: Exception while dispatching incoming RPC call com.google.gwt.user.server.rpc.UnexpectedException: Service method 'Public abstract void de.vogella.gwt.helloworld.client.MyService.creaXML (java.lang.String, java.lang.String, java.lang. String, java.lang.String, java.lang.String, java.lang.String) 'Threw an unexpected exception: javax.xml.transform.TransformerFactoryConfigurationError: Provider not found org.apache.xalan.processor.TransformerFactoryImpl at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure (RPC.java: 378) ... Can anyone tell me if I'm doing the right thing? What error? Thank you all for further clarification Regards Sebe -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
