regular expression to check if string is valid XML [closed]

Answer 1

you can check whether document or text is well-formed, by using a parser. i think this link will help you:

http://www.roseindia.net/xml/dom/DOMParserCheck.shtml

for string replace this line in the link:

InputSource is = new InputSource(xmlFile);

with

ByteArrayInputStream stringStream=new ByteArrayInputStream("XML Text".getBytes());

InputSource is=new InputSource(stringStream);

Answer 2

It's not possible to validate XML with regular expressions. XML is not a regular language.

Use an XML parser to try to parse the string as XML or else validate the XML document against a schema, for example a DTD or XSD file.