Java XML Output - proper indenting for child items
Solution 1
If the Transformer implementation you're using is Xalan-J, then you should be able to use:
transformer.setOutputProperty(
"{http://xml.apache.org/xslt}indent-amount", "5");
See also: http://xml.apache.org/xalan-j/usagepatterns.html
Solution 2
Document doc;
.....
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
transformer.transform(new DOMSource(doc), new StreamResult(new File("filename.xml")));
transformer.transform(new DOMSource(doc), new StreamResult(System.out));
Dr1Ku
# An ambitious software developer, always keen on improving his craft // Inquisitive by default /* MSc. in Applied CS */
Updated on June 04, 2022Comments
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Dr1Ku almost 2 years
I'd like to serialize some simple data model into xml, I've been using the standard java.org.w3c -related code (see below), the indentation is better than no "OutputKeys.INDENT", yet there is one little thing that remains - proper indentation for child elements.
I know that this has been asked before on stackoverflow , yet that configuration did not work for me, this is the code I'm using :
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); Document doc = builder.newDocument(); doc = addItemsToDocument(doc); // The addItemsToDocument method adds childElements to the document. TransformerFactory transformerFactory = TransformerFactory.newInstance(); transformerFactory.setAttribute("indent-number", new Integer(4)); // switching to setAttribute("indent-number", 4); doesn't help Transformer transformer = transformerFactory.newTransformer(); transformer.setOutputProperty(OutputKeys.METHOD, "xml"); transformer.setOutputProperty(OutputKeys.INDENT, "yes"); DOMSource source = new DOMSource(doc); StreamResult result = new StreamResult(outFile); // outFile is a regular File outFile = new File("some/path/foo.xml"); transformer.transform(source, result);
The output produced is :
<?xml version="1.0" encoding="UTF-8" standalone="no"?> <stuffcontainer> <stuff description="something" duration="240" title="abc"> <otherstuff /> </stuff> </stuffcontainer>
Whereas I would want it (for more clarity) like :
<?xml version="1.0" encoding="UTF-8" standalone="no"?> <stuffcontainer> <stuff description="something" duration="240" title="abc"> <otherstuff /> </stuff> </stuffcontainer>
I was just wondering if there is a way of doing this, make it properly indented for the child elements.
Thank you in advance !
Happy Easter coding :-) !