Cara membaca XML menggunakan XPath di Jawa

Saya ingin membaca data XML menggunakan XPath di Jawa, jadi untuk informasi yang telah saya kumpulkan, saya tidak dapat menguraikan XML sesuai dengan kebutuhan saya.

inilah yang ingin saya lakukan:

Dapatkan file XML dari online melalui URL-nya, lalu gunakan XPath untuk menguraikannya, saya ingin membuat dua metode di dalamnya. Salah satunya adalah di mana saya memasukkan id atribut simpul tertentu, dan saya mendapatkan semua simpul anak sebagai hasilnya, dan kedua adalah misalkan saya hanya ingin mendapatkan nilai simpul anak khusus

<?xml version="1.0"?>
<howto>
  <topic name="Java">
      <url>http://www.rgagnonjavahowto.htm</url>
  <car>taxi</car>
  </topic>
  <topic name="PowerBuilder">
       <url>http://www.rgagnon/pbhowto.htm</url>
       <url>http://www.rgagnon/pbhowtonew.htm</url>
  </topic>
  <topic name="Javascript">
        <url>http://www.rgagnon/jshowto.htm</url>
  </topic>
 <topic name="VBScript">
       <url>http://www.rgagnon/vbshowto.htm</url>
 </topic>
 </howto>

Dalam contoh di atas saya ingin membaca semua elemen jika saya mencari melalui @name dan juga satu fungsi di mana saya hanya ingin url dari @name 'Javascript' hanya mengembalikan satu elemen simpul.

Anda perlu sesuatu seperti ini:

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse(<uri_as_string>);
XPathFactory xPathfactory = XPathFactory.newInstance();
XPath xpath = xPathfactory.newXPath();
XPathExpression expr = xpath.compile(<xpath_expression>);

Kemudian Anda memanggil expr.evaluate()lewat dalam dokumen yang ditentukan dalam kode itu dan jenis kembali yang Anda harapkan, dan melemparkan hasilnya ke jenis objek dari hasil.

Jika Anda memerlukan bantuan dengan ekspresi XPath tertentu, Anda mungkin harus menanyakannya sebagai pertanyaan terpisah (kecuali itu pertanyaan Anda di tempat pertama di sini - saya mengerti pertanyaan Anda tentang bagaimana menggunakan API di Jawa).

Sunting: (Respons terhadap komentar): Ekspresi XPath ini akan memberi Anda teks elemen URL pertama di bawah PowerBuilder:

/howto/topic[@name='PowerBuilder']/url/text()

Ini akan memberi Anda yang kedua:

/howto/topic[@name='PowerBuilder']/url[2]/text()

Anda mendapatkannya dengan kode ini:

expr.evaluate(doc, XPathConstants.STRING);

Jika Anda tidak tahu berapa banyak URL dalam node yang diberikan, maka Anda sebaiknya melakukan sesuatu seperti ini:

XPathExpression expr = xpath.compile("/howto/topic[@name='PowerBuilder']/url");
NodeList nl = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);

Dan kemudian lewati NodeList.

Anda bisa mencoba ini.

Dokumen XML

Simpan sebagai employees.xml.

<?xml version="1.0" encoding="UTF-8"?>
<Employees>
    <Employee id="1">
        <age>29</age>
        <name>Pankaj</name>
        <gender>Male</gender>
        <role>Java Developer</role>
    </Employee>
    <Employee id="2">
        <age>35</age>
        <name>Lisa</name>
        <gender>Female</gender>
        <role>CEO</role>
    </Employee>
    <Employee id="3">
        <age>40</age>
        <name>Tom</name>
        <gender>Male</gender>
        <role>Manager</role>
    </Employee>
    <Employee id="4">
        <age>25</age>
        <name>Meghan</name>
        <gender>Female</gender>
        <role>Manager</role>
    </Employee>
</Employees>

Kelas Parser

Kelas memiliki metode berikut

• Daftar barang
• Metode yang akan mengembalikan Nama Karyawan untuk input ID.
• Metode yang akan mengembalikan daftar Nama Karyawan dengan usia lebih besar dari usia input.
• Metode yang akan mengembalikan daftar Nama Karyawan Wanita.

Kode sumber

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;


public class Parser {

    public static void main(String[] args) {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        factory.setNamespaceAware(true);
        DocumentBuilder builder;
        Document doc = null;
        try {
            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()));

        } catch (ParserConfigurationException | SAXException | IOException e) {
            e.printStackTrace();
        }

    }


    private static List<String> getFemaleEmployeesName(Document doc, XPath xpath) {
        List<String> list = new ArrayList<>();
        try {
            //create XPathExpression object
            XPathExpression expr =
                xpath.compile("/Employees/Employee[gender='Female']/name/text()");
            //evaluate expression result on XML document
            NodeList nodes = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);
            for (int i = 0; i < nodes.getLength(); i++)
                list.add(nodes.item(i).getNodeValue());
        } catch (XPathExpressionException e) {
            e.printStackTrace();
        }
        return list;
    }


    private static List<String> getEmployeeNameWithAge(Document doc, XPath xpath, int age) {
        List<String> list = new ArrayList<>();
        try {
            XPathExpression expr =
                xpath.compile("/Employees/Employee[age>" + age + "]/name/text()");
            NodeList nodes = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);
            for (int i = 0; i < nodes.getLength(); i++)
                list.add(nodes.item(i).getNodeValue());
        } catch (XPathExpressionException e) {
            e.printStackTrace();
        }
        return list;
    }


    private static String getEmployeeNameById(Document doc, XPath xpath, int id) {
        String name = null;
        try {
            XPathExpression expr =
                xpath.compile("/Employees/Employee[@id='" + id + "']/name/text()");
            name = (String) expr.evaluate(doc, XPathConstants.STRING);
        } catch (XPathExpressionException e) {
            e.printStackTrace();
        }

        return name;
    }

}

Contoh persiapan:

file xml:

<inventory>
    <book year="2000">
        <title>Snow Crash</title>
        <author>Neal Stephenson</author>
        <publisher>Spectra</publisher>
        <isbn>0553380958</isbn>
        <price>14.95</price>
    </book>

    <book year="2005">
        <title>Burning Tower</title>
        <author>Larry Niven</author>
        <author>Jerry Pournelle</author>
        <publisher>Pocket</publisher>
        <isbn>0743416910</isbn>
        <price>5.99</price>
    </book>

    <book year="1995">
        <title>Zodiac</title>
        <author>Neal Stephenson</author>
        <publisher>Spectra</publisher>
        <isbn>0553573862</isbn>
        <price>7.50</price>
    </book>

    <!-- more books... -->

</inventory>

Kode Java:

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;


try {

    DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
    Document doc = docBuilder.parse (new File("c:\\tmp\\my.xml"));

    // normalize text representation
    doc.getDocumentElement().normalize();
    System.out.println ("Root element of the doc is " + doc.getDocumentElement().getNodeName());

    NodeList listOfBooks = doc.getElementsByTagName("book");
    int totalBooks = listOfBooks.getLength();
    System.out.println("Total no of books : " + totalBooks);

    for(int i=0; i<listOfBooks.getLength() ; i++) {

        Node firstBookNode = listOfBooks.item(i);
        if(firstBookNode.getNodeType() == Node.ELEMENT_NODE) {

            Element firstElement = (Element)firstBookNode;                              
            System.out.println("Year :"+firstElement.getAttribute("year"));

            //-------
            NodeList firstNameList = firstElement.getElementsByTagName("title");
            Element firstNameElement = (Element)firstNameList.item(0);

            NodeList textFNList = firstNameElement.getChildNodes();
            System.out.println("title : " + ((Node)textFNList.item(0)).getNodeValue().trim());
        }
    }//end of for loop with s var
} catch (SAXParseException err) {
    System.out.println ("** Parsing error" + ", line " + err.getLineNumber () + ", uri " + err.getSystemId ());
    System.out.println(" " + err.getMessage ());
} catch (SAXException e) {
    Exception x = e.getException ();
    ((x == null) ? e : x).printStackTrace ();
} catch (Throwable t) {
    t.printStackTrace ();
}                

Berikut adalah contoh pemrosesan xpath dengan vtd-xml ... untuk pemrosesan XML tugas berat, tidak ada duanya. di sini adalah makalah terbaru tentang hal ini Memproses XML dengan Java - Benchmark Kinerja

import com.ximpleware.*;

public class changeAttrVal {
    public  static  void main(String s[]) throws VTDException,java.io.UnsupportedEncodingException,java.io.IOException{
        VTDGen vg = new VTDGen();
        if (!vg.parseFile("input.xml", false))
            return;
        VTDNav vn = vg.getNav();
        AutoPilot ap = new AutoPilot(vn);
        XMLModifier xm = new XMLModifier(vn);
        ap.selectXPath("/*/place[@id=\"p14\" and   @initialMarking=\"2\"]/@initialMarking");
        int i=0;
        while((i=ap.evalXPath())!=-1){
            xm.updateToken(i+1, "499");// change initial marking from 2 to 499
        }
        xm.output("new.xml");
    }

}

Jika Anda memiliki xml seperti di bawah ini

<e:Envelope
    xmlns:d = "http://www.w3.org/2001/XMLSchema"
    xmlns:e = "http://schemas.xmlsoap.org/soap/envelope/"
    xmlns:wn0 = "http://systinet.com/xsd/SchemaTypes/"
    xmlns:i = "http://www.w3.org/2001/XMLSchema-instance">
    <e:Header>
        <Friends>
            <friend>
                <Name>Testabc</Name>
                <Age>12121</Age>
                <Phone>Testpqr</Phone>
            </friend>
        </Friends>
    </e:Header>
    <e:Body>
        <n0:ForAnsiHeaderOperResponse xmlns:n0 = "http://systinet.com/wsdl/com/magicsoftware/ibolt/localhost/ForAnsiHeader/ForAnsiHeaderImpl#ForAnsiHeaderOper?KExqYXZhL2xhbmcvU3RyaW5nOylMamF2YS9sYW5nL1N0cmluZzs=">
            <response i:type = "d:string">12--abc--pqr</response>
        </n0:ForAnsiHeaderOperResponse>
    </e:Body>
</e:Envelope>

dan ingin mengekstrak xml di bawah ini

<e:Header>
   <Friends>
      <friend>
         <Name>Testabc</Name>
         <Age>12121</Age>
         <Phone>Testpqr</Phone>
      </friend>
   </Friends>
</e:Header>

Kode di bawah ini membantu mencapai hal yang sama

public static void main(String[] args) {

    File fXmlFile = new File("C://Users//abhijitb//Desktop//Test.xml");
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    Document document;
    Node result = null;
    try {
        document = dbf.newDocumentBuilder().parse(fXmlFile);
        XPath xPath = XPathFactory.newInstance().newXPath();
        String xpathStr = "//Envelope//Header";
        result = (Node) xPath.evaluate(xpathStr, document, XPathConstants.NODE);
        System.out.println(nodeToString(result));
    } catch (SAXException | IOException | ParserConfigurationException | XPathExpressionException
            | TransformerException e) {
        e.printStackTrace();
    }
}

private static String nodeToString(Node node) throws TransformerException {
    StringWriter buf = new StringWriter();
    Transformer xform = TransformerFactory.newInstance().newTransformer();
    xform.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
    xform.transform(new DOMSource(node), new StreamResult(buf));
    return (buf.toString());
}

Sekarang jika Anda hanya menginginkan xml seperti di bawah ini

<Friends>
   <friend>
      <Name>Testabc</Name>
      <Age>12121</Age>
      <Phone>Testpqr</Phone>
   </friend>
</Friends>

Anda perlu mengubah

String xpathStr = "//Envelope//Header"; untuk String xpathStr = "//Envelope//Header/*";

Ini menunjukkan Anda bagaimana caranya

1. Baca dalam file XML ke a DOM
2. Saring satu set NodesdenganXPath
3. Lakukan tindakan tertentu pada masing-masing yang diekstraksi Nodes.

Kami akan memanggil kode dengan pernyataan berikut

processFilteredXml(xmlIn, xpathExpr,(node) -> {/*Do something...*/;});

Dalam kasus kami, kami ingin mencetak beberapa creatorNamesdari book.xmlpenggunaan "//book/creators/creator/creatorName"sebagai xpath untuk melakukan printNodetindakan pada setiap Node yang cocok dengan XPath.

Kode lengkap

@Test
public void printXml() {
    try (InputStream in = readFile("book.xml")) {
        processFilteredXml(in, "//book/creators/creator/creatorName", (node) -> {
            printNode(node, System.out);
        });
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

private InputStream readFile(String yourSampleFile) {
    return Thread.currentThread().getContextClassLoader().getResourceAsStream(yourSampleFile);
}

private void processFilteredXml(InputStream in, String xpath, Consumer<Node> process) {
    Document doc = readXml(in);
    NodeList list = filterNodesByXPath(doc, xpath);
    for (int i = 0; i < list.getLength(); i++) {
        Node node = list.item(i);
        process.accept(node);
    }
}

public Document readXml(InputStream xmlin) {
    try {
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = dbf.newDocumentBuilder();
        return db.parse(xmlin);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

private NodeList filterNodesByXPath(Document doc, String xpathExpr) {
    try {
        XPathFactory xPathFactory = XPathFactory.newInstance();
        XPath xpath = xPathFactory.newXPath();
        XPathExpression expr = xpath.compile(xpathExpr);
        Object eval = expr.evaluate(doc, XPathConstants.NODESET);
        return (NodeList) eval;
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

private void printNode(Node node, PrintStream out) {
    try {
        Transformer transformer = TransformerFactory.newInstance().newTransformer();
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
        transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
        StreamResult result = new StreamResult(new StringWriter());
        DOMSource source = new DOMSource(node);
        transformer.transform(source, result);
        String xmlString = result.getWriter().toString();
        out.println(xmlString);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

Cetakan

<creatorName>Fosmire, Michael</creatorName>

<creatorName>Wertz, Ruth</creatorName>

<creatorName>Purzer, Senay</creatorName>

Untuk book.xml

<book>
  <creators>
    <creator>
      <creatorName>Fosmire, Michael</creatorName>
      <givenName>Michael</givenName>
      <familyName>Fosmire</familyName>
    </creator>
    <creator>
      <creatorName>Wertz, Ruth</creatorName>
      <givenName>Ruth</givenName>
      <familyName>Wertz</familyName>
    </creator>
    <creator>
      <creatorName>Purzer, Senay</creatorName>
       <givenName>Senay</givenName>
       <familyName>Purzer</familyName>
    </creator>
  </creators>
  <titles>
    <title>Critical Engineering Literacy Test (CELT)</title>
  </titles>
</book>

Memperluas jawaban yang sangat baik oleh @bluish dan @Yishai, berikut adalah bagaimana Anda membuat NodeLists dan atribut simpul mendukung iterators, yaitu for(Node n: nodelist)antarmuka.

Gunakan seperti:

NodeList nl = ...
for(Node n : XmlUtil.asList(nl))
{...}

dan

Node n = ...
for(Node attr : XmlUtil.asList(n.getAttributes())
{...}

Kode:

/**
 * Converts NodeList to an iterable construct.
 * From: https://stackoverflow.com/a/19591302/779521
 */
public final class XmlUtil {
    private XmlUtil() {}

    public static List<Node> asList(NodeList n) {
        return n.getLength() == 0 ? Collections.<Node>emptyList() : new NodeListWrapper(n);
    }

    static final class NodeListWrapper extends AbstractList<Node> implements RandomAccess {
        private final NodeList list;

        NodeListWrapper(NodeList l) {
            this.list = l;
        }

        public Node get(int index) {
            return this.list.item(index);
        }

        public int size() {
            return this.list.getLength();
        }
    }

    public static List<Node> asList(NamedNodeMap n) {
        return n.getLength() == 0 ? Collections.<Node>emptyList() : new NodeMapWrapper(n);
    }

    static final class NodeMapWrapper extends AbstractList<Node> implements RandomAccess {
        private final NamedNodeMap list;

        NodeMapWrapper(NamedNodeMap l) {
            this.list = l;
        }

        public Node get(int index) {
            return this.list.item(index);
        }

        public int size() {
            return this.list.getLength();
        }
    }
}

Baca file XML menggunakan XPathFactory, SAXParserFactory dan StAX (JSR-173).

Menggunakan XPath get node dan data turunannya.

public static void main(String[] args) {
    String xml = "<soapenv:Body xmlns:soapenv='http://schemas.xmlsoap.org/soap/envelope/'>"
            + "<Yash:Data xmlns:Yash='http://Yash.stackoverflow.com/Services/Yash'>"
            + "<Yash:Tags>Java</Yash:Tags><Yash:Tags>Javascript</Yash:Tags><Yash:Tags>Selenium</Yash:Tags>"
            + "<Yash:Top>javascript</Yash:Top><Yash:User>Yash-777</Yash:User>"
            + "</Yash:Data></soapenv:Body>";
    String jsonNameSpaces = "{'soapenv':'http://schemas.xmlsoap.org/soap/envelope/',"
            + "'Yash':'http://Yash.stackoverflow.com/Services/Yash'}";
    String xpathExpression = "//Yash:Data";

    Document doc1 = getDocument(false, "fileName", xml);
    getNodesFromXpath(doc1, xpathExpression, jsonNameSpaces);
    System.out.println("\n===== ***** =====");
    Document doc2 = getDocument(true, "./books.xml", xml);
    getNodesFromXpath(doc2, "//person", "{}");
}
static Document getDocument( boolean isFileName, String fileName, String xml ) {
    Document doc = null;
    try {

        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        factory.setValidating(false);
        factory.setNamespaceAware(true);
        factory.setIgnoringComments(true);
        factory.setIgnoringElementContentWhitespace(true);

        DocumentBuilder builder = factory.newDocumentBuilder();
        if( isFileName ) {
            File file = new File( fileName );
            FileInputStream stream = new FileInputStream( file );
            doc = builder.parse( stream );
        } else {
            doc = builder.parse( string2Source( xml ) );
        }
    } catch (SAXException | IOException e) {
        e.printStackTrace();
    } catch (ParserConfigurationException e) {
        e.printStackTrace();
    }
    return doc;
}

/**
 * ELEMENT_NODE[1],ATTRIBUTE_NODE[2],TEXT_NODE[3],CDATA_SECTION_NODE[4],
 * ENTITY_REFERENCE_NODE[5],ENTITY_NODE[6],PROCESSING_INSTRUCTION_NODE[7],
 * COMMENT_NODE[8],DOCUMENT_NODE[9],DOCUMENT_TYPE_NODE[10],DOCUMENT_FRAGMENT_NODE[11],NOTATION_NODE[12]
 */
public static void getNodesFromXpath( Document doc, String xpathExpression, String jsonNameSpaces ) {
    try {
        XPathFactory xpf = XPathFactory.newInstance();
        XPath xpath = xpf.newXPath();

        JSONObject namespaces = getJSONObjectNameSpaces(jsonNameSpaces);
        if ( namespaces.size() > 0 ) {
            NamespaceContextImpl nsContext = new NamespaceContextImpl();

            Iterator<?> key = namespaces.keySet().iterator();
            while (key.hasNext()) { // Apache WebServices Common Utilities
                String pPrefix = key.next().toString();
                String pURI = namespaces.get(pPrefix).toString();
                nsContext.startPrefixMapping(pPrefix, pURI);
            }
            xpath.setNamespaceContext(nsContext );
        }

        XPathExpression compile = xpath.compile(xpathExpression);
        NodeList nodeList = (NodeList) compile.evaluate(doc, XPathConstants.NODESET);
        displayNodeList(nodeList);
    } catch (XPathExpressionException e) {
        e.printStackTrace();
    }
}

static void displayNodeList( NodeList nodeList ) {
    for (int i = 0; i < nodeList.getLength(); i++) {
        Node node = nodeList.item(i);
        String NodeName = node.getNodeName();

        NodeList childNodes = node.getChildNodes();
        if ( childNodes.getLength() > 1 ) {
            for (int j = 0; j < childNodes.getLength(); j++) {

                Node child = childNodes.item(j);
                short nodeType = child.getNodeType();
                if ( nodeType == 1 ) {
                    System.out.format( "\n\t Node Name:[%s], Text[%s] ", child.getNodeName(), child.getTextContent() );
                }
            }
        } else {
            System.out.format( "\n Node Name:[%s], Text[%s] ", NodeName, node.getTextContent() );
        }

    }
}
static InputSource string2Source( String str ) {
    InputSource inputSource = new InputSource( new StringReader( str ) );
    return inputSource;
}
static JSONObject getJSONObjectNameSpaces( String jsonNameSpaces ) {
    if(jsonNameSpaces.indexOf("'") > -1)    jsonNameSpaces = jsonNameSpaces.replace("'", "\"");
    JSONParser parser = new JSONParser();
    JSONObject namespaces = null;
    try {
        namespaces = (JSONObject) parser.parse(jsonNameSpaces);
    } catch (ParseException e) {
        e.printStackTrace();
    }
    return namespaces;
}

Dokumen XML

<?xml version="1.0" encoding="UTF-8"?>
<book>
<person>
  <first>Yash</first>
  <last>M</last>
  <age>22</age>
</person>
<person>
  <first>Bill</first>
  <last>Gates</last>
  <age>46</age>
</person>
<person>
  <first>Steve</first>
  <last>Jobs</last>
  <age>40</age>
</person>
</book>

Put out untuk XPathExpression yang diberikan:

String xpathExpression = "//person/first";
/*OutPut:
 Node Name:[first], Text[Yash] 
 Node Name:[first], Text[Bill] 
 Node Name:[first], Text[Steve] */

String xpathExpression = "//person";
/*OutPut:
     Node Name:[first], Text[Yash] 
     Node Name:[last], Text[M] 
     Node Name:[age], Text[22] 
     Node Name:[first], Text[Bill] 
     Node Name:[last], Text[Gates] 
     Node Name:[age], Text[46] 
     Node Name:[first], Text[Steve] 
     Node Name:[last], Text[Jobs] 
     Node Name:[age], Text[40] */

String xpathExpression = "//Yash:Data";
/*OutPut:
     Node Name:[Yash:Tags], Text[Java] 
     Node Name:[Yash:Tags], Text[Javascript] 
     Node Name:[Yash:Tags], Text[Selenium] 
     Node Name:[Yash:Top], Text[javascript] 
     Node Name:[Yash:User], Text[Yash-777] */

Lihat tautan ini untuk Implementasi kami sendiriNamespaceContext