There are certain unicode characters which are prohibited by the XML spec. I've written the following method which should strip remove these characters from a document
String cleanHtml(String source) {
Document document = Jsoup.parse(source);
document.outputSettings().syntax(Document.OutputSettings.Syntax.xml);
return document.html();
}If I test this using the following HTML input
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
</head>
<body>
<table>
<tbody>
<tr>
<td>Field Value</td>
<td>before 	  after</td>
</tr>
</tbody>
</table>
</body>
</html>The XML entities representing illegal unicode character are removed and the resulting document can be parsed by an XML parser. However, if I add 
<td>before 	  after</td>
then the String returned by cleanHtml throws the following exception when parsed as XML
org.xml.sax.SAXParseException; lineNumber: 10; columnNumber: 17; An invalid XML character (Unicode: 0xb) was found in the element content of the document.
There are certain unicode characters which are prohibited by the XML spec. I've written the following method which should strip remove these characters from a document
If I test this using the following HTML input
The XML entities representing illegal unicode character are removed and the resulting document can be parsed by an XML parser. However, if I add
then the String returned by
cleanHtmlthrows the following exception when parsed as XML