为什么dom4j文档对象将XML EOL \\ r \\ n转换为\\ n

Question

I am parsing xml string using DOM4J jar (I have tried 1.6.1 & 2.0.2) below is my sample code

SAXReader reader = new SAXReader();
InputSource inputSource = new InputSource(new StringReader("<root xml:space='preserve'>\r\n<emp>\r\n<name>raj</name>\r\n</emp>\r\n</root>"));
Document document = null;

try {
    document = reader.read(inputSource);
} catch (DocumentException e1) {
    e1.printStackTrace();
}       
String st = document.asXML(); //When I debug I can see below value in this st variable
//<root xml:space='preserve'>\n<emp>\n<name>raj</name>\n</emp>\n</root>

Why its coverting XML EOL (End of Line) from \\r\\n to \\n ?

If I want to preserve same EOL as "\\r\\n", Is there any option available ?

Answer 1

Mandated by the specification :

To simplify the tasks of applications, the XML processor must behave as if it normalized all line breaks in external parsed entities (including the document entity) on input, before parsing, by translating both the two-character sequence #xD #xA and any #xD that is not followed by #xA to a single #xA character.

You can set the line separator used when writing XML documents:

OutputFormat#setLineSeparator(String)