xml parsing - Document, XPath

http://stove99.tistory.com/106

대충 요렇게 쓰면 됨

try {
    Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(url);
    XPath xpath = XPathFactory.newInstance().newXPath();
    NodeList elements = (NodeList) xpath.evaluate("//rootElement/targetElement", document, XPathConstants.NODESET);

    if (elements == null) {
        return StringUtils.EMPTY;
    } else {
        return elements.item(0).getTextContent();
    }
} catch (Exception e) {
    e.printStackTrace();
} finally {
    return StringUtils.EMPTY;
}