SAX builder causes the problem, why?

Hello,

I have been working on sending XML file from simple client to servlet for a week now,and I couldn't overcome the problem. The problem is that when I send the XML file that was generated in the client side, the servlet recieves it as numbers, therefore, I have to rebuild the XML file, so I had to use the SAXbuilder, and write some data to the client again. Though, the client throws excpetion in the InputStream line. Below are the codes:

client side:

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
 
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.output.XMLOutputter;
 
public class C {

public static void main(String args[]){
C c = new C();
c.onSendData();
}
 
private URLConnection getServletConnection() throws MalformedURLException,
IOException {
 
// Connection zum Servlet �ffnen
 
URL urlServlet = new URL("http://localhost:8080/TryXML/S");
HttpURLConnection con = (HttpURLConnection) urlServlet.openConnection();
 
// konfigurieren
con.setRequestMethod("POST");
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
con.setRequestProperty("Content-Type", "text/xml");
 
// und zur�ckliefern
return con;
}

private void onSendData() {
try {

Element root = new Element("DB");
Document doc = new Document(root);
Element IDb = new Element("BankID");
IDb.setText("A123");
root.addContent(IDb);
 
XMLOutputter serializer = new XMLOutputter();
 
org.jdom.output.Format newFormat = org.jdom.output.Format
.getPrettyFormat();
 
newFormat.setIndent("  ");
 
serializer.setFormat(newFormat);
 
serializer.output(doc, System.out);

PrintWriter out = new PrintWriter(new FileOutputStream("hello.xml"));

URLConnection con = getServletConnection();
OutputStream outstream = con.getOutputStream();

serializer.output(doc,outstream);

outstream.flush();
outstream.close();
 
// receive result from servlet
InputStream instr = con.getInputStream();
ObjectInputStream inputFromServlet = new ObjectInputStream(instr);
String result = (String) inputFromServlet.readObject();
System.out.println("I got from servlet: " + result);
inputFromServlet.close();
instr.close();

} catch (Exception ex) {
ex.printStackTrace();

}
}
 
 
}

----------------------------

servlet side:

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
 
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.output.XMLOutputter;
 
public class C {

public static void main(String args[]){
C c = new C();
c.onSendData();
}
 
private URLConnection getServletConnection() throws MalformedURLException,
IOException {
 
// Connection zum Servlet �ffnen
 
URL urlServlet = new URL("http://localhost:8080/TryXML/S");
HttpURLConnection con = (HttpURLConnection) urlServlet.openConnection();
 
// konfigurieren
con.setRequestMethod("POST");
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
con.setRequestProperty("Content-Type", "text/xml");
 
// und zur�ckliefern
return con;
}

private void onSendData() {
try {

Element root = new Element("DB");
Document doc = new Document(root);
Element IDb = new Element("BankID");
IDb.setText("A123");
root.addContent(IDb);
 
XMLOutputter serializer = new XMLOutputter();
 
org.jdom.output.Format newFormat = org.jdom.output.Format
.getPrettyFormat();
 
newFormat.setIndent("  ");
 
serializer.setFormat(newFormat);
 
serializer.output(doc, System.out);

PrintWriter out = new PrintWriter(new FileOutputStream("hello.xml"));

URLConnection con = getServletConnection();
OutputStream outstream = con.getOutputStream();

serializer.output(doc,outstream);

outstream.flush();
outstream.close();
 
// receive result from servlet
InputStream instr = con.getInputStream();
ObjectInputStream inputFromServlet = new ObjectInputStream(instr);
String result = (String) inputFromServlet.readObject();
System.out.println("I got from servlet: " + result);
inputFromServlet.close();
instr.close();

} catch (Exception ex) {
ex.printStackTrace();

}
}
 
 
}

-----------------

xml file

----------------

Excpeiton throwed

java.io.IOException: server return Server returned HTTP response code: 500 for URL: http://localhost:8080/TryXML/S at sun.net.www.protocol.http.HttpURLConnection.getInputStream at C.onSendData(C.java:75)
at C.main(C.java:22)

Please I need help

[ November 14, 2008: Message edited by: Paul Sturrock ]

Your question is a little confusing - you don't appear to be using a Servlet, you seem to have two clients? Is there a Servlet configured at http://localhost:8080/TryXML/S ?

Response code 500 is SC_INTERNAL_SERVER_ERROR

From the client side you cant tell what that error was.

Therefore, I cant see what SAXbuilder had to do with the problem. You should be looking at the server logs.

Bill

Hello,

Sorry for posting the wrong code for the servlet side.
Any way I solved the problem and I removed the SAX builder and read the input as String line and rewrote them into another xml file.

But, there is another problem.. When I integradet the client class with an Applet, the Applet fails to load. and this is due to the Jdom pakcage. It says: NoClassFound for org.jdom.... or no definition found for java.lang.jdom something like that. I separated the Applet class from the class that will generate the xml and make connection, but same error.

How I can solve this porblem?

Please do not post the same question more than once.