code: public static long getLastModified(ServletContext servletContext, HttpServletRequest request, String path) {
  		return getLastModified(
  			servletContext,
  			request,
  			path,
  			FileUtils.getExtension(path)
  		);
  	}
docs: Automatically determines extension from path.
  
  @see  #getLastModified(javax.servlet.ServletContext, java.lang.String, java.lang.String)