Java, XML DocumentBuilder - setting the encoding when parsing

Question

I'm trying to save a tree (extends JTree) which holds an XML document to a DOM Object having changed it's structure.

I have created a new document object, traversed the tree to retrieve the contents successfully (including the original encoding of the XML document), and now have a ByteArrayInputStream which has the tree contents (XML document) with the correct encoding.

The problem is when I parse the ByteArrayInputStream the encoding is changed to UTF-8 (in the XML document) automatically.

Is there a way to prevent this and use the correct encoding as provided in the ByteArrayInputStream.

It's also worth adding that I have already used the
transformer.setOutputProperty(OutputKeys.ENCODING, encoding) method to retrieve the right encoding.

Any help would be appreciated.

Can your share a bit of your code?

gawi
– gawi

2010-08-26 18:59:23 +00:00
Commented Aug 26, 2010 at 18:59 — gawi
– gawi, Commented Aug 26, 2010 at 18:59

Cyril N. · Accepted Answer · 2014-02-21 11:19:05Z

5

Here's an updated answer since OutputFormat is deprecated :

TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
transformer.setOutputProperty(OutputKeys.ENCODING, "ISO-8859-1");

StringWriter writer = new StringWriter();
transformer.transform(new DOMSource(document), new StreamResult(writer));
String output = writer.getBuffer().toString().replaceAll("\n|\r", "");

The second part will return the XML Document as String

answered Feb 21, 2014 at 11:19

Cyril N.

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Comments

SWeko · Accepted Answer · 2012-12-17 14:59:27Z

3

// Read XML
String xml = "xml"
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(new InputSource(new StringReader(xml)));

// Append formatting
OutputFormat format = new OutputFormat(document);

if (document.getXmlEncoding() != null) {
  format.setEncoding(document.getXmlEncoding());
}

format.setLineWidth(100);
format.setIndenting(true);
format.setIndent(5);
Writer out = new StringWriter();
XMLSerializer serializer = new XMLSerializer(out, format);
serializer.serialize(document);
String result = out.toString();

edited Dec 17, 2012 at 14:59

SWeko

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answered Dec 17, 2012 at 14:38

Andrey

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2 Comments

Andrew Barber Over a year ago

Some explanation of this code would be useful for those who come and read this answer later.

bvdb Over a year ago

Also it would be useful to mention which XMLSerializer you use. org.apache.xml.serialize.XMLSerializer I assume ? - using the "internal" ones of the sun package would be really bad practice.

ase · Accepted Answer · 2015-09-15 18:53:08Z

2

I solved it, given alot of trial and errors.

I was using

OutputFormat format = new OutputFormat(document);

but changed it to

OutputFormat format = new OutputFormat(d, encoding, true);

and this solved my problem.

encoding is what I set it to be
true refers to whether or not indent is set.

Note to self - read more carefully - I had looked at the javadoc hours ago - if only I'd have read more carefully.

edited Sep 15, 2015 at 18:53

ase

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answered Aug 26, 2010 at 19:33

Ralph D

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Comments

Matt · Accepted Answer · 2016-11-15 20:50:16Z

1

This worked for me and is very simple. No need for a transformer or output formatter:

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
InputSource is = new InputSource(inputStream);
is.setEncoding("ISO-8859-1"); // set your encoding here
Document document = builder.parse(is);

answered Nov 15, 2016 at 20:50

Matt

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