Develop Reference

XPath not reading xml tag with namespace

hi i am trying to read a xml which have namespace defined and some tags are with namespaces. But namespace tags always give empty value when i use XPath to read those tags.
Sample XML
<?xml version="1.0" encoding="UTF-8"?>
<Employees xmlns:ULAD="http://www.datamodelextension.org/Schema/ULAD">
<EXTENSION>
<OTHER>
<ULAD:HMDAGenderType>Male</ULAD:HMDAGenderType>
</OTHER>
</EXTENSION>
</Employees>
Sample Java Program to read ULAD:HMDAGenderType
public static void main(String args[]) throws XPathExpressionException {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
try {
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse("C:\\test.xml");
XPathFactory xpathFactory = XPathFactory.newInstance();
XPath xpath = xpathFactory.newXPath();
XPathExpression expr = xpath.compile("/Employees/EXTENSION/OTHER/ULAD:HMDAGenderType");
System.out.println("Gender :: " + expr.evaluate(doc, XPathConstants.STRING));
} catch (ParserConfigurationException | SAXException | IOException e) {
e.printStackTrace();
}
}
Output :: null
Expected Output :: Male
How to read such tags ?

Try using XPath local-name()
Instead of
XPathExpression expr = xpath.compile("/Employees/EXTENSION/OTHER/ULAD:HMDAGenderType");
Please try
XPathExpression expr = xpath.compile("//*[local-name()='HMDAGenderType']");
And to get the text attribute value directly you can use this XPath:
XPathExpression expr = xpath.compile("//*[local-name()='HMDAGenderType']/text()");

Need to extract element from XML

Below is the XML:-
<?xml version="1.0" encoding="utf-8"?>
<Stock>
<Identification>
<AccountID></AccountID>
<CustomerId></CustomerId>
</Identification>
<Product>
<ArticleName>Monitors</ArticleName>
<BaseUnit></BaseUnit>
<Notes></Notes>
<ID>11f13e2e-ae97-45b5-a9a9-23fa7f6bb767</ID>
<ID>b22834c0-a570-4e6b-97c3-5067a14d118d</ID>
<ID>ed458593-5e1a-4dc1-94f0-a66eeef2dd79</ID>
<ID>d25584a9-1db2-48cf-9a70-9b81e5a7e7f2</ID>
<LogisticalInfo>
<BaseUnit></BaseUnit>
<Compoundheight>4.78</Compoundheight>
<Compoundwidth>5.67</Compoundwidth>
<Compounddepth></Compounddepth>
<Compoundweight></Compoundweight>
<CompoundweightUnit>g</CompoundweightUnit>
<TotalHeight>30.5</TotalHeight>
<Totalwidth>542.7</Totalwidth>
<Totaldepth>37.5</Totaldepth>
<TotalWeight>2840</TotalWeight>
<height>mm</height>
<Weight>g</Weight>
<Depth>mm</Depth>
</LogisticalInfo>
</Product>
I would like to extract Compoundheight and Compounddepth, Below is the part of code to extract it but it is throwing error:java.lang.StringIndexOutOfBoundsException.
stringXmlDocument = productHeader + toStringXml(node, true) + productTrailer;
int CompoundheightCodeStart = stringXmlDocument.indexOf("<Compoundheight>");
int CompoundheightCodeEnd = stringXmlDocument.indexOf("</Compoundheight>"); height_packed=Double.parseDouble(stringXmlDocument.substring(CompoundheightCodeStart+13,CompoundheightCodeEnd));
int CompounddepthCodeStart = stringXmlDocument.indexOf("<Compounddepth>");
int CompounddepthCodeEnd = stringXmlDocument.indexOf("</Compounddepth>");depth_packed=Double.parseDouble(stringXmlDocument.substring(CompounddepthCodeStart+12, CompounddepthCodeEnd));

A better approach than indexOf would be to use Java XPath implementation for navigating XML.
See the Java XPath implementation, and the XPath Specification.
An example:
// parse the xml into a Document
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
InputStream inputStream = this.class.getResourceAsStream("test.xml");
Document document = builder.parse(inputStream);
// Obtain a specific element from within the Document
XPathFactory xPathFactory = XPathFactory.newInstance();
XPath xPath = xPathFactory.newXPath();
String articleName = xPath.evaluate("/Stock/Product/ArticleName", document);
System.out.println("ArticleName is: " + articleName);

How to retrieve XML element attribute having namespaces using java?

I have the below xml and I am trying to retrieve the value of id under BoostBuryDimensionValue tag using the java code but returns nothing.
Can some one help me on this. Thanks in advance.
Input XML
<?xml version="1.0" encoding="UTF-8"?>
<ContentItem type="OrganicZoneContent" xmlns="http://endeca.com/schema/content/2008" >
<TemplateId>OrganicResults</TemplateId>
<Name>OrganicResults</Name>
<Property name="navigation_records">
<BoostBury rollupKey="grp_id" recspecField="grp_id" xmlns="http://endeca.com/schema/content/xtags/2010">
<BoostBuryRecords>
<BoostBuryRecord recordType="CRITERIA" boostBuryType="BOOST">
<BoostBurySearch terms="null" key="null"/>
<BoostBuryDimensionValues>
<BoostBuryDimensionValue id="4294965238" name="career" dimensionName="Occasion"/>
</BoostBuryDimensionValues>
</BoostBuryRecord>
</BoostBuryRecords>
</BoostBury>
</Property>
</ContentItem>
and the java code i am using is
public static void main(String[] args) throws Exception {
InputStream xml = new FileInputStream("tempinput.xml");
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(xml);
XPath xpath = XPathFactory.newInstance().newXPath();
XPathExpression expr = xpath.compile("ContentItem/Property[#name='navigation_records']/BoostBury/BoostBuryRecords/BoostBuryRecord/BoostBuryDimensionValues/BoostBuryDimensionValue/#id");
Object result = expr.evaluate(doc, XPathConstants.STRING);
System.out.println("BoostBuryDimensionValue id = " + result);
}

java dom search xml

hello i have this xml
<?xml version="1.0" encoding="utf-8" standalone="no"?><?xml-stylesheet type="text/xsl" href="new2.xsl"?>
<patients>
<patient>
<stoixeia_astheni>
<arithmos_eksetasis>1</arithmos_eksetasis>
<imerominia_eksetasis>11/12/2005</imerominia_eksetasis>
<amka>14385</amka>
</stoixeia_astheni>
<stoixeia_epikoinonias>
<dieuthinsi>Μητσοπούλου 20</dieuthinsi>
</stoixeia_epikoinonias>
<loipa_stoixeia>
<fylo>Aρρεν</fylo>
</loipa_stoixeia>
</patient>
<patient>
same code here
</patient>
</patients>
and i want to search this by amka value.
i have tried this:
Document doc = docBuilder.parse(filepath);
NodeList root= doc.getDocumentElement().getChildNodes();
for(int i=0; i<root.getLength(); i++){
if(root.item(i).getChildNodes().item(0).getChildNodes().item(2).getNodeValue()=="14385"){
pw.println("Gataki<br>");
}
}
but runtime error occurs
Any help would be useful.

Use this xpath
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("/patients/patient/stoixeia_astheni/amka/text()");
NodeList nl = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);
Just in case takke a look at this xpath syntaxis
/ Selects from the root node
// Selects nodes in the document from the current node that match the selection no matter where they are
. Selects the current node
.. Selects the parent of the current node
# Selects attributes

Java XML Parse/Query

I have such XML structure, when I use NodeList nList = doc.getElementsByTagName("stock"); it return me 3 stocks, 2 main stock tags and one which is under substocks. I want to get only two stock which is on upper level and ignore all which is under substock tags.
Is it possible in Java to make something like LINQ query in C#, say return me elements only where name is equals to "Sony".
Thanks!
<city>
<stock>
<name>Sony</name>
</stock>
<stock>
<name>Panasonic</name>
<substocks>
<stock>
<name>Panasonic Shop 2</name>
</stock>
</substocks>
</stock>
</city>

I recommend you to use XPath with javax.xml.xpath package:
final InputStream is = new FileInputStream('your.xml');
final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
final DocumentBuilder builder = factory.newDocumentBuilder();
final Document doc = builder.parse(is);
final XPathFactory xPathfactory = XPathFactory.newInstance();
final XPath xpath = xPathfactory.newXPath();
final XPathExpression expr = xpath.compile("/city/stock/name[text()='Sony']");
and then:
final NodeList nl = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);

Take a look on XPath and its java implementation JXPath. Other possible approach is parsing XML using JAXB and operating objects list using LambdaJ.

There is also dom4j library which has powerful navigation with XPath:
import org.dom4j.Document;
import org.dom4j.io.SAXReader;
SAXReader reader = new SAXReader();
Document document = reader.read("test.xml");
List list = document.selectNodes("/city/stock/name[text()='Sony']");
for (Iterator iter = list.iterator(); iter.hasNext(); ) {
// TODO: place you logic here
}
More examples are here

Try jcabi-xml (see this blog post) with a one-liner:
Collection<XML> found = new XMLDocument("your document here").nodes(
"/city/stock/name[text()='Sony']"
);