* Otherwise, the root folder is equal to the working folder.
*/
protected void resolveAppDir(String classPathFileName) {
URL url = ClassLoaderUtil.getResourceUrl(classPathFileName);
if (url == null) {
throw new AppException("Failed to resolve app dir, missing: " + classPathFileName);
}
String protocol = url.getProtocol();
if (protocol.equals("file") == false) {