XmlUtilities.java 文件源码

/**
 * Get values matching passed XPath expression
 * @param node
 * @param expression XPath expression
 * @return matching values
 * @throws Exception
 */
private static String[] getByXpath( Node node, String expression ) throws Exception {

    XPathFactory xPathFactory = XPathFactory.newInstance();
    XPath xPath = xPathFactory.newXPath();
    XPathExpression xPathExpression = xPath.compile(expression);

    NodeList nlist = (NodeList) xPathExpression.evaluate(node, XPathConstants.NODESET);

    int nodeListSize = nlist.getLength();
    List<String> values = new ArrayList<String>(nodeListSize);
    for (int index = 0; index < nlist.getLength(); index++) {
        Node aNode = nlist.item(index);
        values.add(aNode.getTextContent());
    }
    return values.toArray(new String[values.size()]);
}