[jdom-interest] how to append to an xml file using jdom

[awais hamid]

Hello friends  i am deeloping a semantic cache of xml queries and xml 
documents
Here is a glimpse of my code in which i am creating an xml document with 
following structure
- <queries>
  <query>/books/book[price>300]/bookname</query>
  </queries>

SAXBuilder saxobj=new SAXBuilder();
Element rootofquery = new Element("queries");
Element elementofquery = new Element("query");
Document doc1ofquery = new Document();

elementofquery.setText(query);


rootofquery.addContent(elementofquery);
doc1ofquery.addContent(rootofquery);

In the code given below i will be saving xml o queries.xml file

XMLOutputter outputter = new XMLOutputter(Format.getPrettyFormat());
File queryfile=new File("queries.xml");
FileOutputStream queryout=new FileOutputStream(queryfile);

	    outputter.output(doc1ofquery, queryout);

But every time when this script executes the previus data is overwritten 
which i dont want.

What should be done? to append to existing data instead of replacing it.

I would be thankful for ur replies

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