Example usage for javax.xml.xpath XPathFactory newInstance

List of usage examples for javax.xml.xpath XPathFactory newInstance

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Introduction

In this page you can find the example usage for javax.xml.xpath XPathFactory newInstance.

Prototype

public static XPathFactory newInstance()

Source Link

Document

Get a new XPathFactory instance using the default object model, #DEFAULT_OBJECT_MODEL_URI , the W3C DOM.

This method is functionally equivalent to:

 newInstance(DEFAULT_OBJECT_MODEL_URI)

Since the implementation for the W3C DOM is always available, this method will never fail.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();
    Document doc = builder.parse(new File("Table.xml"));

    XPathFactory xFactory = XPathFactory.newInstance();
    XPath path = xFactory.newXPath();
    XPathExpression exp = path.compile("/tables/table");
    NodeList nlTables = (NodeList) exp.evaluate(doc, XPathConstants.NODESET);
    for (int tblIndex = 0; tblIndex < nlTables.getLength(); tblIndex++) {
        Node table = nlTables.item(tblIndex);
        Node nAtt = table.getAttributes().getNamedItem("title");
        System.out.println(nAtt.getTextContent());
        exp = path.compile("headings/heading");
        NodeList nlHeaders = (NodeList) exp.evaluate(table, XPathConstants.NODESET);
        Set<String> headers = new HashSet<String>(25);
        for (int index = 0; index < nlHeaders.getLength(); index++) {
            headers.add(nlHeaders.item(index).getTextContent().trim());
        }/*from   ww w .  j  a  v a  2s . c om*/
        for (String header : headers) {
            System.out.println(header);
        }
        exp = path.compile("tablebody/tablerow");
        NodeList nlRows = (NodeList) exp.evaluate(table, XPathConstants.NODESET);
        for (int index = 0; index < nlRows.getLength(); index++) {
            Node rowNode = nlRows.item(index);
            exp = path.compile("tablecell/item");
            NodeList nlValues = (NodeList) exp.evaluate(rowNode, XPathConstants.NODESET);
            List<String> values = new ArrayList<String>(25);
            for (int valueIndex = 0; valueIndex < nlValues.getLength(); valueIndex++) {
                values.add(nlValues.item(valueIndex).getTextContent().trim());
            }
            for (String value : values) {
                System.out.println(value);
            }
        }
    }
}

From source file:MainClass.java

public static void main(String[] args) throws ParserConfigurationException, XPathExpressionException,
        org.xml.sax.SAXException, java.io.IOException {
    String documentName = args[0];
    String expression = args[1];/*w w w  . j av a  2  s .com*/

    DocumentBuilder parser = DocumentBuilderFactory.newInstance().newDocumentBuilder();
    Document doc = parser.parse(new java.io.File(documentName));

    XPath xpath = XPathFactory.newInstance().newXPath();

    System.out.println(xpath.evaluate(expression, doc));

    NodeList nodes = (NodeList) xpath.evaluate(expression, doc, XPathConstants.NODESET);
    for (int i = 0, n = nodes.getLength(); i < n; i++) {
        Node node = nodes.item(i);
        System.out.println(node);
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setNamespaceAware(true);//w ww . j  a  va2 s . c  o  m
    DocumentBuilder builder;
    Document doc = null;
    builder = factory.newDocumentBuilder();
    doc = builder.parse("employees.xml");
    // Create XPathFactory object
    XPathFactory xpathFactory = XPathFactory.newInstance();
    // Create XPath object
    XPath xpath = xpathFactory.newXPath();
    String name = getEmployeeNameById(doc, xpath, 4);
    System.out.println("Employee Name with ID 4: " + name);

    List<String> names = getEmployeeNameWithAge(doc, xpath, 30);
    System.out.println("Employees with 'age>30' are:" + Arrays.toString(names.toArray()));

    List<String> femaleEmps = getFemaleEmployeesName(doc, xpath);
    System.out.println("Female Employees names are:" + Arrays.toString(femaleEmps.toArray()));
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    Document retval = dbf.newDocumentBuilder().newDocument();
    Element parent = retval.createElement("parent");
    retval.appendChild(parent);/*from   w  w w.  j a va 2  s .co m*/

    Element child1 = retval.createElement("child");
    child1.setTextContent("child.text");
    parent.appendChild(child1);
    Element child2 = retval.createElement("child");
    child2.setTextContent("child.text.2");
    parent.appendChild(child2);

    XPathFactory factory = XPathFactory.newInstance();
    XPath xPath = factory.newXPath();
    System.out.println(xPath.evaluate("//child/text()", retval, XPathConstants.NODE).getClass());

}

From source file:Main.java

public static void main(String[] args)
        throws ParserConfigurationException, SAXException, IOException, XPathExpressionException {

    DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
    domFactory.setNamespaceAware(true);//from  ww w . j ava2s .  c  om
    DocumentBuilder builder = domFactory.newDocumentBuilder();
    Document doc = builder.parse("books.xml");

    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();
    XPathExpression expr = xpath.compile("//numDocs");

    Object result = expr.evaluate(doc, XPathConstants.NODESET);
    NodeList nodes = (NodeList) result;
    for (int i = 0; i < nodes.getLength(); i++) {
        System.out.println(nodes.item(i).getNodeValue());
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {

    String xml = "<metadata><codes class = 'class1'>" + "<code code='ABC'>" + "<detail x='blah blah'/>"
            + "</code>" + "</codes>" + "<codes class = 'class2'>" + "<code code = '123'>"
            + "<detail x='blah blah'/></code></codes></metadata>";

    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = dbf.newDocumentBuilder();
    Document doc = db.parse(new ByteArrayInputStream(xml.getBytes()));

    XPath xPath = XPathFactory.newInstance().newXPath();
    XPathExpression expr = xPath.compile("//codes/code[@code ='ABC']");
    Object result = expr.evaluate(doc, XPathConstants.NODESET);

    NodeList nodes = (NodeList) result;
    System.out.println(nodes.getLength() > 0 ? "Yes" : "No");
    for (int i = 0; i < nodes.getLength(); i++) {
        System.out.println("nodes: " + nodes.item(i).getNodeValue());
    }/*from   w  w w .  ja  v  a 2 s.  c o m*/
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    SimpleDateFormat xmlDateFormat = new SimpleDateFormat("MM.dd.yy");

    MapVariableResolver resolver = new MapVariableResolver();
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = dbf.newDocumentBuilder();
    Document document = builder.parse(new File("t.xml"));

    XPathFactory factory = XPathFactory.newInstance();
    XPath xPath = factory.newXPath();
    xPath.setXPathVariableResolver(resolver);
    XPathExpression expression = xPath.compile("/schedule/show[@date=$date]/guest");

    String formattedDate = xmlDateFormat.format(new Date(2006, 5, 14));
    resolver.addVariable(null, "date", formattedDate);
    Element guest = (Element) expression.evaluate(document, XPathConstants.NODE);

    System.out.println(guest.getElementsByTagName("name").item(0).getTextContent());
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    List<String> names = new ArrayList<>();
    URL oracle = new URL("http://weather.yahooapis.com/forecastrss?w=2502265");
    InputStream is = oracle.openStream();
    DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
    domFactory.setNamespaceAware(true);/*from  w  w w . ja  va2  s . co  m*/
    DocumentBuilder builder = domFactory.newDocumentBuilder();
    Document doc = builder.parse(is);
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();
    XPathExpression expr = xpath.compile("//*:*/@*");
    Object result = expr.evaluate(doc, XPathConstants.NODESET);
    NodeList nl = (NodeList) result;
    for (int i = 0; i < nl.getLength(); i++) {
        names.add(nl.item(i).getNodeName());
        Node node = nl.item(i);
        String path = "." + node.getNodeName() + " = " + node.getNodeValue();
        node = ((Attr) node).getOwnerElement();
        while (node != null) {
            path = node.getNodeName() + '/' + path;
            node = node.getParentNode();
        }
        System.out.println(path);
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    String xml = "<?xml version='1.0' encoding='UTF-8'?>" + "<Employees>"
            + "  <Employee emplid='1' type='admin'>" + "    <firstname/>" + "    <lastname>A</lastname>"
            + "    <age>30</age>" + "    <email>j@s.com</email>" + "  </Employee>"
            + "  <Employee emplid='2' type='admin'>" + "    <firstname>S</firstname>"
            + "    <lastname>H</lastname>" + "    <age>32</age>" + "    <email>s@h.com</email>"
            + "  </Employee>" + "</Employees>";
    List<String> ids = Arrays.asList("1", "2");
    for (int i = 0; i < ids.size(); i++) {
        String employeeId = ids.get(i);
        String xpath = "/Employees/Employee[@emplid='" + employeeId + "']/firstname";
        XPath xPath = XPathFactory.newInstance().newXPath();
        String employeeFirstName = xPath.evaluate(xpath, new InputSource(new StringReader(xml)));
        if (employeeFirstName == "") {
            System.out.println("Employee " + employeeId + " has no first name.");
        } else {// w w  w  .  jav a 2 s .  c  o m
            System.out.println("Employee " + employeeId + "'s first name is " + employeeFirstName);
        }
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
    domFactory.setValidating(false);// ww w  .j  av a 2 s  .c  o m
    domFactory.setNamespaceAware(true);
    domFactory.setIgnoringComments(true);
    domFactory.setIgnoringElementContentWhitespace(true);

    DocumentBuilder builder = domFactory.newDocumentBuilder();
    Document dDoc = builder.parse("C:/data.xsd");

    Node rootNode = dDoc.getElementsByTagName("xs:schema").item(0);
    System.out.println(rootNode.getNodeName());

    XPath xPath1 = XPathFactory.newInstance().newXPath();
    NamespaceContext nsContext = new NamespaceContext() {
        @Override
        public String getNamespaceURI(String prefix) {
            return "http://www.w3.org/2001/XMLSchema";
        }

        @Override
        public String getPrefix(String namespaceURI) {
            return "xs";
        }

        @Override
        public Iterator getPrefixes(String namespaceURI) {
            Set s = new HashSet();
            s.add("xs");
            return s.iterator();
        }
    };
    xPath1.setNamespaceContext((NamespaceContext) nsContext);
    NodeList nList1 = (NodeList) xPath1.evaluate("//xs:schema", dDoc, XPathConstants.NODESET);
    System.out.println(nList1.item(0).getNodeName());

    NodeList nList2 = (NodeList) xPath1.evaluate("//xs:element", rootNode, XPathConstants.NODESET);
    System.out.println(nList2.item(0).getNodeName());
}