private String getFieldFromXML(String xml,String fieldToFind){
//http://www.baeldung.com/java-xpath
String found;
try{
Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new ByteArrayInputStream(xml.getBytes()));
XPathFactory factory = XPathFactory.newInstance();
XPath xpath = factory.newXPath();
XPathExpression expr = xpath.compile(fieldToFind);
NodeList nl = (NodeList)expr.evaluate(doc, XPathConstants.NODESET);
found=nl.item(0).getTextContent();
}catch (Exception e){
found=null;
}
return found;
}