How to change the attributes of an XML file

Question

hi peeps 'ope you can help me here i need to change the attributes of an xml file, i parse it first using a DOM parser but i cant find a way to change the attributes in the XML file, setAttribute() works only at runtime and doesn't change the attribute in the file itself. I can't find a method that will answer my question. I've searched through the forum and found similar threads....they say in order to write and change the attribute i must use the write() method of the XmlDocument class defined in com.sun.xml.tree.XmlDocument. But, i found another thread, and it says that com.sun.xml.tree.XmlDocument is not safe to use and i should use org.apache.crimson.tree.XmlDocument.....i can't find the XmlDocument class and the API for this package so i really dont know where to start...hope you guys can help me! thnx

Answer 1

thanks for responding roland....i already found the solution...i didn't use the XmlDocument class because i can't find any documents about it except for JAXP 1.0 here is my code snippet...i used the TransformerFactory and Transformer class to write
import org.w3c.dom.*;
import org.w3c.dom.traversal.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
Document doc = null;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
dbf.setValidating(false);
doc = db.parse(fileGetFile); //this is the XML file
n1 = (Node)doc.getDocumentElement();
e1 = (Element) n1;
NodeList nodeList = doc.getElementsByTagName ("File");
//just insert whatever you want to do with the XML...parse it..set/change the attribute..etc....sample snippet below changes the attribute downloaded to "no"
for(int iWriteFailed = 0; iWriteFailed <nodeList.getLength() ; iWriteFailed ++){     
n2 = nodeList.item(iWriteFailed);
e2 = (Element) n2;          
e2.setAttribute("downloaded", "no");}
try{
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
transformer.transform(new DOMSource(doc), new StreamResult ( new FileOutputStream ( fileGetFile) ) );}
catch(Exception trans){}
thanks for responding and keeping the information interchange alive here in the forum...
Pau