XPath with namespace

XPath example

<?xml version="1.0" encoding="UTF-8"?>
<persons xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.ods.co.za" xsi:schemaLocation="http://www.ods.ca.za PersonService.xsd">
<person isn="3101111" userID="SOFXX" timestamp="2010-02-27T07:36:48+02:00" millis="200">
    <partyID> 2831762 </partyID>
    <idNumber type="ID_NUMBER">
        <number> 7777777777777 </number>
    </idNumber>
    <incomeTaxNumber> 1091919191 </incomeTaxNumber>
    <title> Ms </title>
    <surname> FIRST </surname>
    <initials> AT </initials>
    <firstName> ASSISTANCE </firstName>
    <middleNames> MIDDLE </middleNames>
    <gender> FEMALE </gender>
    <dateOfBirth> 1970-06-05 </dateOfBirth>
    <language> ENGLISH </language>
    <maritalStatus> MARRIED </maritalStatus>
    <contactDetails preferredContact="POST">
        <addresses correspondanceAddress="POSTAL">
            <address type="POSTAL" timestamp="2010-02-27T07:36:48+02:00" millis="200">
                <line1> PO BOX </line1>
                <line2> SUBURB </line2>
                <country> SOUTH AFRICA </country>
                <postalCode> 1320 </postalCode>
                <undeliverable> 0 </undeliverable>
            </address>
        </addresses>
    </contactDetails>
    <defaultPayPoint isn="726" userID="010Q09" timestamp="2014-05-15T14:29:08+02:00" millis="700" type="BANK_ACCOUNT">
        <code> C11005 </code>
        <name> FIRST NAT BANK MALELANE </name>
        <bankName> FIRST NATIONAL BANK </bankName>
        <branchName> FIRST NAT BANK MALELANE </branchName>
        <branchCode> 270952 </branchCode>
        <accountNumber> 00000000064646464644 </accountNumber>
        <accountHolderName> AT SURNAME </accountHolderName>
    </defaultPayPoint>
</person>
</persons>

XPath with namespace

XPath xpath = XPathFactory.newInstance().newXPath();
xpath.setNamespaceContext(new NamespaceContext() {
  @Override
  public String getNamespaceURI(String prefix) {
    if ("ns".equals(prefix)) {
      return "http://www.ods.co.za";
    }
    return null;
  }

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

  @Override
  public Iterator getPrefixes(String namespaceURI) {
    return null;
  }
            
});

//Retrieves an entry
xpath.evaluate("/ns:persons/ns:person/ns:partyID", new InputSource(new StringReader(xmlResponse)));

//Retrieves an attribute
xpath.evaluate("/ns:persons/ns:person/@isn", new InputSource(new StringReader(xmlResponse)));