How to get the attribute value of an xml node using java

I have an xml which looks like this:

{ <xml><ep><source type="xml">...</source><source type="text">..</source></ep></xml>}

Here I want to retrieve the value of “source type” where type is an attribute.

I tried the following, which didn’t work:

DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
try {
    DocumentBuilder builder = domFactory.newDocumentBuilder();
    Document dDoc = builder.parse("D:/workspace1/ereader/src/main/webapp/configurations/config.xml");
    System.out.println(dDoc);
    XPath xPath = XPathFactory.newInstance().newXPath();
    Node node = (Node) xPath.evaluate("//xml/source/@type/text()", dDoc, XPathConstants.NODE);
    System.out.println(node);
} catch (Exception e) {
    e.printStackTrace();

This also didn’t work:

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
InputSource is = new InputSource(new StringReader("config.xml"));
Document doc = builder.parse(is);

NodeList nodeList = doc.getElementsByTagName("source");

for (int i = 0; i < nodeList.getLength(); i++) {
    Node node = nodeList.item(i);

    if (node.hasAttributes()) {
        Attr attr = (Attr) node.getAttributes().getNamedItem("type");
        if (attr != null) {
            String attribute = attr.getValue();
            System.out.println("attribute: " + attribute);
        }
    }
}

Answer

Since your question is more generic so try to implement it with XML Parsers available in Java .If you need it in specific to parsers, update your code here what you have tried yet

<?xml version="1.0" encoding="UTF-8"?>
<ep>
    <source type="xml">TEST</source>
    <source type="text"></source>
</ep>

DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse("uri to xmlfile");
XPathFactory xPathfactory = XPathFactory.newInstance();
XPath xpath = xPathfactory.newXPath();
XPathExpression expr = xpath.compile("//ep/source[@type]");
NodeList nl = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);

for (int i = 0; i < nl.getLength(); i++)
{
    Node currentItem = nl.item(i);
    String key = currentItem.getAttributes().getNamedItem("type").getNodeValue();
    System.out.println(key);
}