Java Utililty Methods XPath Evaluate

Byte asByte(String expression, Node node)
Evaluates the specified XPath expression and returns the result as a Byte.

String byteString = evaluateAsString(expression, node);
return (isEmptyString(byteString)) ? null : Byte.valueOf(byteString);

Byte asByte(String expression, Node node)
Evaluates the specified XPath expression and returns the result as a Byte.

String byteString = evaluateAsString(expression, node);
return (isEmptyString(byteString)) ? null : Byte.valueOf(byteString);

String convertToXpath(String qname)
convert To Xpath

QName name = QName.valueOf(qname);
if ("".equals(name.getNamespaceURI())) {
 return "//" + name.getLocalPart();
} else {
 return "//*[local-name()='" + name.getLocalPart() + "' and namespace-uri()='" + name.getNamespaceURI()
 + "']";

Node evaluate(Document doc)
evaluate

return (Node) expression.evaluate(doc, XPathConstants.NODE);

String evaluate(File xmlFile, String xPathExpression)
evaluate

String result = null;
try {
 XPathFactory factory = XPathFactory.newInstance();
 XPath xPath = factory.newXPath();
 result = xPath.evaluate(xPathExpression, new InputSource(new FileInputStream(xmlFile)));
} catch (Exception ex) {
 System.out.println(ex.getMessage());
return result;

boolean evaluate(Node node, XPathExpression expression)
Evaluates the XPath expression in the specified context and returns whether such element was found.

try {
 Boolean result = (Boolean) expression.evaluate(node, XPathConstants.BOOLEAN);
 return result != null && result;
} catch (XPathExpressionException e) {
 return false;

T evaluate(Object obj, String xpathExpression, QName qName)
evaluate

try {
 return (T) xpath.compile(xpathExpression).evaluate(obj, qName);
} catch (XPathExpressionException e) {
 throw new RuntimeException(e);

String evaluate(String path, Node node)
evaluate

path = path.trim();
try {
 XPath xp = XPathFactory.newInstance().newXPath();
 XPathExpression expr = xp.compile(path);
 String ret = expr.evaluate(node);
 return ret;
} catch (Exception ex) {
 throw new RuntimeException(ex);
...

String evaluate(XPath xpath, String base, String path, Document document)
evaluate

try {
 return xpath.evaluate(base + "/" + path, document).trim();
} catch (Exception e) {
return null;

String evaluateAsString(String expression, Node node)
Evaluates the specified expression on the specified node and returns the result as a String.

if (isEmpty(node))
 return null;
if (!expression.equals(".")) {
 if (asNode(expression, node) == null)
 return null;
String s = xpath().evaluate(expression, node);
return s.trim();
...