public void init(FilterConfig filterConfig) throws ServletException { super.init(filterConfig); String excludedExtensionsParam = filterConfig.getInitParameter("excludedExtensions"); if (excludedExtensionsParam != null) { StringTokenizer tokenizer = new StringTokenizer(excludedExtensionsParam, ",", false); while (tokenizer.hasMoreTokens()) { excludedExtensions.add(tokenizer.nextToken().trim()); } } }