static String parseCDATA(Element elem){
  if (elem == null) {
    return null;
  }
  Node text=elem.getFirstChild();
  if (text != null) {
    return text.getNodeValue();
  }
  return null;
}

static String parseCDATA ( Element elem ) { if ( elem == null ) { return null ; } Node text = elem . getFirstChild ( ) ; if ( text != null ) { return text . getNodeValue ( ) ; } return null ; }
parse element , and return cdata as string
