code: public static Resource newSystemResource(String resource)
          throws IOException
      {
          URL url=null;
          // Try to format as a URL?
          ClassLoader
              loader=Thread.currentThread().getContextClassLoader();
          if (loader!=null)
          {
              url=loader.getResource(resource);
              if (url==null && resource.startsWith("/"))
                  url=loader.getResource(resource.substring(1));
          }
          if (url==null)
          {
              loader=Resource.class.getClassLoader();
              if (loader!=null)
              {
                  url=loader.getResource(resource);
                  if (url==null && resource.startsWith("/"))
                      url=loader.getResource(resource.substring(1));
              }
          }
          
          if (url==null)
          {
              url=ClassLoader.getSystemResource(resource);
              if (url==null && resource.startsWith("/"))
                  url=loader.getResource(resource.substring(1));
          }
          
          if (url==null)
              return null;
          
          return newResource(url);
      }
docs: Construct a system resource from a string.
  The resource is tried as classloader resource before being
  treated as a normal resource.