CODEWITHSUNDEEP
javaxmlxml-parsingnodesnodelist
John
John

Reputation: 105

Extract all the recurring element of XML using java

My XML looks like below and I need to extract multiple ID element in an output xml:-

<?xml version="1.0" encoding="utf-8"?>
<Stock>
    <PIdentification>
    <CatalogVersion></CatalogVersion>
    <AccountID></AccountID>
    <CustomerId></CustomerId>
    </ProviderIdentification>
    <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>
    </Product>
</Stock>

I have used "Nodelist" to extract "ID" but I am getting just one element and not all 4, below is the part of the code:-

{   
    Node IDNode = element.getElementsByTagName("ID").item(0);
    IDXml = toStringXml(IDNode , true);
}

I am not able to reiterate for look to get all the IDs, please let me know how to get all ID, any help is appreciated.

    private static String toStringXml(Node elt, boolean xmlDeclaration) 
    throws TransformerException {
     TransformerFactory transformerFactory = TransformerFactory
        .newInstance();
    Transformer transformer = transformerFactory.newTransformer();

    if(xmlDeclaration)
    transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
    DOMSource source = new DOMSource(elt);
    StreamResult result = new StreamResult(new StringWriter());
    transformer.transform(source, result);

    return result.getWriter().toString();
    }

Upvotes: 1

Views: 1096

Answers (2)

Rafael
Rafael

Reputation: 2039

You have malformed XML displayed in your question. Unclosed <PIdentification> tag on the row 3.

Correct XML code should look like that:

<?xml version="1.0" encoding="utf-8"?>
<Stock>
    <ProviderIdentification>
        <CatalogVersion></CatalogVersion>
        <AccountID></AccountID>
        <CustomerId></CustomerId>
    </ProviderIdentification>
    <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>
    </Product>
</Stock>

And in this case, code, provided by @Penguin74 displays all IDS from your xml (check the picture below).

demo

Upvotes: 0

Penguin74
Penguin74

Reputation: 488

You got all id's but you are only looking at first item with .item(id).

Method getElementsByTageName("ID") returns you NodeList so you can got trough all ids for example like that:

File xmlFile = new File("src/main/resources/example.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();

DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document element = dBuilder.parse(xmlFile);

NodeList list = element.getElementsByTagName("ID");
for (int i = 0; i < list.getLength(); i++){
    Node specificIDNode = list.item(i);
    System.out.println(specificIDNode.getTextContent());
}

Upvotes: 2

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