How to read child XML using XPath in Java

Question

The XML file is as :

Xml File

Code I have written:

List queryXmlUsingXpathAndReturnList(String xml, String xpathExpression) {

DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance()

DocumentBuilder dBuilder = dbFactory.newDocumentBuilder()

Document doc = dBuilder.parse(new ByteArrayInputStream(xml.getBytes(StandardCharsets.UTF_8)))

doc.getDocumentElement().normalize()

XPath xPath = XPathFactory.newInstance().newXPath()

NodeList nodeList = (NodeList) xPath.compile(xpathExpression).evaluate(doc, XPathConstants.NODESET)

List returnElements = new ArrayList<>()

nodeList.each { n ->

returnElements.add(n.getTextContent())

}

When I am passing the xpath as:

/Envelope/Body/CommandResponseData/OperationResult/Operation/ParameterList/ListParameter/StringElement

It returns all the values. But I want to return only the ListParameter values whose name="PackageTypeList".

For that I am using the xpath as:

/Envelope/Body/CommandResponseData/OperationResult/Operation/ParameterList/ListParameter[@name='PackageTypeList']/StringElement

But it returns list as null.

Pictures are useless. Please edit your post and add your XML as a text. — Yitzhak Khabinsky
– Yitzhak Khabinsky, Commented Nov 25, 2020 at 18:54

JekO · Accepted Answer · 2020-11-25 19:01:37Z

0

I guess you miss "CommandResult" between "CommandResponseData" and "OperationResult" in your XPath-Expression.

answered Nov 25, 2020 at 19:01

JekO

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1 Comment

Ashwini Pattanayak Over a year ago

It seems wrongly I pasted it. My xpath is: /Envelope/Body/CommandResponseData/CommandResult/OperationResult/Operation/ParameterList/ListParameter[@name='PackageList']/StringElement Still getting null response. If I will remove [@name='PackageList'] , I am getting all the values, but as I mentioned I need specific data whose name=PackageList.

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