How to update a file on a server from a JSP page

From: Jérôme VUIBERT (jerome.vuibert_at_fleximage.fr)
Date: 02/27/04 

Date: Fri, 27 Feb 2004 16:44:25 +0100

Hi.

I have to update a file on the server where a JSP file is .

To read the previous value, I use an InputStream, and close it.
I then do the update in my object representing the data file.
I use an OutputStream, do the flush, close the stream, but the file still
stay unupdated, and no error is throwed

Can someone give me a solution ?

Jerome

======================

<%@ page language="java" %>
......
<%@ page import="......." %>
<%
  String l_szJalonFileName =
"http://the_server_address/data.xml";
 java.net.URL l_fileURL = null;
 JAXBContext l_jc = null;
 DataClass l_data = null;

 // Read the old value
 try
 {
     l_jc = JAXBContext.newInstance("data.jaxb");
     Unmarshaller unmarshaller = l_jc.createUnmarshaller();
     l_fileURL = new java.net.URL(l_szJalonFileName);
     java.net.URLConnection l_connection = l_fileURL.openConnection();
     java.io.InputStream l_is = l_connection.getInputStream();
     l_data = (DataClass ) unmarshaller.unmarshal(l_is);
     l_is.close();
 }
    catch(Exception e)
    {
     // -- study error messages
    }

    // Update the value in the l_data object

    // Write the new value in the previous file
    try
    {
     Marshaller marshaller = l_jc.createMarshaller();
     java.net.URLConnection l_connection = l_fileURL.openConnection();
     l_connection.setDoOutput(true);
     java.io.OutputStream l_os = l_connection.getOutputStream();
     marshaller.marshal(l_sessionList, l_os);
     l_os.flush();
     l_os.close();
 }
    catch(Exception e)
    {
     // -- study error messages
    }
%>

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