Getting document as null [#document: null] After parsing XML in java using DocumentBuilder

Question

After parsing the documengt I am getting null, even though the document contains data. Here is my code, I have set all validations to false.

DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();

    domFactory.setNamespaceAware(false); // never forget this!
    domFactory.setCoalescing(false);
    domFactory.setValidating(false);
    domFactory.setFeature("http://xml.org/sax/features/namespaces", false);
    domFactory.setFeature("http://xml.org/sax/features/validation", false);
    domFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-dtd-grammar", false);
    domFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
    domFactory.setFeature("http://apache.org/xml/features/allow-java-encodings",
                       true);



    DocumentBuilder builder = domFactory.newDocumentBuilder();

    builder.setEntityResolver(new EntityResolver() {
        public InputSource resolveEntity(java.lang.String publicId, java.lang.String systemId)
                throws SAXException, java.io.IOException {
            if (publicId.equals("--myDTDpublicID--"))
                // this deactivates the open office DTD
                return new InputSource(new ByteArrayInputStream("<?xml version='1.0' encoding='UTF-8'?>".getBytes()));
            else return null;
        }
    });


    Document doc = null;
    URL url = new URL(urlStr);
    URLConnection urlc = url.openConnection();



    doc = builder.parse(urlc.getInputStream());
    System.out.println("doc:" + doc.toString());

The response comes as :

doc:[#document: null]

Why? Am I missing some validation?

I think this link can answer of your question. http://stackoverflow.com/questions/2018868/documentbuilder-parseinputstream-returns-null — Ishwar Pohani, Oct 31 '12 at 05:46

score 16 · Answer 1 · edited Jul 17 '14 at 21:23

16

[#document: null] is just the toString of your doc instance, it doesn't output your whole XML document.

The instance itself is not null, you can probably continue your processing without a problem.

edited Jul 17 '14 at 21:23

Joel Fischer

6,521
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answered Apr 18 '11 at 04:48

wjans

10,009
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score -1 · Answer 2 · answered Nov 30 '12 at 15:00

you should add the static modifier to your Document object, I had the same problem and after the parsing action all non-static objects were simply referring to null. Making it static somehow forces java to keep the reference to the created object during the parse action in your variable.

Getting document as null [#document: null] After parsing XML in java using DocumentBuilder

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