How do I Send a xml to client?

Question

Hi friends:
It is possible to send a xml to client without a xml file in the server?
I create a Document in the server and the code is :
                                                               DocumentBuilderFactory df=DocumentBuilderFactory.newInstance();
               DocumentBuilder db=df.newDocumentBuilder();
               Document  doc=db.newDocument();
               Element el=doc.createElement("root");
               doc.appendChild(el);
               Comment co=doc.createComment("This is a comment");
               el.appendChild(co);I want to write the Document to a Stream and send the XML stream to client ,so the client can display a xml.
The code is:
                                                               resp.setContentType("text/xml");
               resp.setContentLength(200);
               resp.setHeader("Content-Disposition","inline;filename=address.xml");
               ServletOutputStream so=resp.getOutputStream();
               PrintStream ps=new PrintStream(so);
               System.out.println(doc);
               ps.print(doc);
               so.flush();
               ps.close();I don't want to create a xml in the server so I can do this only use stream .But what client get is a momery address! It is org.dom.xml....@sd7fs87d What wrong with my code ? How to send the xml to client without create the xml file in server?
Thks in advanced!

Answer 1

Yashnoo,
What XML package that you used?
It should have a class for outputing xml
example using JDOM
XMLOutputter writer = new XMLOutputter(Format.getPrettyFormat());
OutputStream out = new FileOutputStream("dummy.txt");
writer.output(doc, out);
//this case it write to a file but in your case you can pass in ServletOutputStream
or ByteArrayOutPutStream then use method writeTo() to send it to ServletOutputStream
another thing, make sure to set your content length corretly,
resp.setContentLength(200);
how do you know its length is 200
if you are going to use ByteArrayOutPutStream, it will give you the correct length
for instance
ByteArrayOutPutStream out = new ByteArrayOutPutStream ();
XMLOutputter writer = new XMLOutputter(Format.getPrettyFormat());
writer.output(doc, out);
int len = out.size();
now you can do this
resp.setContentLength(len);
finally,
out.writeTo(resp.getOutputStream());
it should send a stream out to the client.
bottom line is, find out your package API or you can post the package you use, I can take a look
here is a sample of using JDOM to create a document then output it out to System.out
good luck
public static void createXMLFile()
          Element root = null;
          Document doc = new Document();
          try
               String[] arr = {"MainElement ","SubElement1","SubElement2","SubElement2"};
               String[] arr1 = {"MainElement ","SubElement111","SubElement22","SubElement332"};     
               root = new Element("root");
               doc.setRootElement(root);
               //for each array do the following
               Element e = new Element(arr[0].trim());
               root.addContent(e);     //<MainElement>
               for (int i = 1; i < arr.length; i++)
                    e.addContent(new Element(arr.trim()));     //<SubElement1>
               //finally output to a file as your choice
               XMLOutputter writer = new XMLOutputter(Format.getPrettyFormat());
//               OutputStream out = new FileOutputStream("dummy.txt");
               writer.output(doc, System.out);
//               out.flush();
//               out.close();
          catch (Exception e)
               e.printStackTrace();