java - xml search element by id -

For example:

Can we find an element by id using the XML parser in the ID element, for example:

  & lt; Root & gt; & Lt; Reference ID = "One" & gt; & Lt; Unit & gt; & Lt; Identifier & gt; A new & lt; / Identifier & gt; & Lt; / Unit & gt; & Lt; / References & gt; & Lt; Reference ID = "Two" & gt; & Lt; Unit & gt; & Lt; Identifier & gt; The second one & lt; / Identifier & gt; & Lt; / Unit & gt; & Lt; / References & gt; & Lt; / Root & gt;   
 I need a node with id = "one", my code  
  DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance (); DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder (); Document document = docBuilder.parse (new file ("filename.xml")); Element element = document. GetElementById ("A");   
 Return blank,  
 Is there any other way?   
 
 
  
  For note: Name "id" or "id "Are not attribute type IDs, unless it is defined.   
 The problem is that the  document  does not know that a feature called an "identifier" called  id  unless you tell it . You must set a schema on  DocumentBuilderFactory  before calling  newDocumentBuilder . Thus  DocumentBuilder  will know about element types.  
 In the schema, you will need in a suitable place like this:  
  & lt; Xs: attribute name = "id" type = "x: id" />