java - Getting encoding type of a XML file?

Question

I am parsing XML using DocumentBuilder.

XML has first line as this:

xml version="1.0" encoding="GBK"

I want to get encoding type of the XML and use it. How can I get "GBK"

Basically i will be making one more XML where i want encoding="GBK" to be retained.

Currently it is getting lost and set to default UTF-8

There are many XML with different encoding and I need to read encoding of the source fileF.

Answer 1

One way to this works like this

final XMLStreamReader xmlStreamReader = XMLInputFactory.newInstance().createXMLStreamReader( new FileReader( testFile ) );

//running on MS Windows fileEncoding is "CP1251"
String fileEncoding = xmlStreamReader.getEncoding(); 

//the XML declares UTF-8 so encodingFromXMLDeclaration is "UTF-8"
String encodingFromXMLDeclaration = xmlStreamReader.getCharacterEncodingScheme();