How to get xml attribute values using Document builder factory
How do I get the attribute values using the following code I am getting; as output for msg. I want to print MSID, type, CHID, SPOS, type, PPOS values. Anyone can fix this problem.
String xml1="<message MSID='20' type='2635'>"
+"<che CHID='501' SPOS='2'>"
+"<pds type='S'>"
+"<position PPOS='S01'/>"
+"</pds>"
+"</che>"
+"</message>";
InputSource source = new InputSource(new StringReader(xml1));
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document document = db.parse(source);
XPathFactory xpathFactory = XPathFactory.newInstance();
XPath xpath = xpathFactory.newXPath();
String msg = xpath.evaluate("/message/che/CHID", document);
String status = xpath.evaluate("/pds/position/PPOS", document);
System.out.println("msg=" + msg + ";" + "status=" + status);
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2 answers
You need to use @
in your XPath for the attribute and also your path specifier for the second element is wrong:
String msg = xpath.evaluate("/message/che/@CHID", document);
String status = xpath.evaluate("/message/che/pds/position/@PPOS", document);
With these changes, I get the output:
msg=501;status=S01
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You can use Document.getDocumentElement()
to get the root element and Element.getElementsByTagName()
to get the children:
Document document = db.parse(source);
Element docEl = document.getDocumentElement(); // This is <message>
String msid = docEl.getAttribute("MSID");
String type = docEl.getAttribute("type");
Element position = (Element) docEl.getElementsByTagName("position").item(0);
String ppos = position.getAttribute("PPOS");
System.out.println(msid); // Prints "20"
System.out.println(type); // Prints "2635"
System.out.println(ppos); // Prints "S01"
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