Tomcat 8.5 cookie-domain的問題

java.lang.IllegalArgumentException: An invalid domain [.xxxx.com] was specified for this cookie

tomcat8.5較之前版本不需要.了

 private static final String getDomainName(HttpServletRequest request) {
        String domainName = null;

        String serverName = request.getRequestURL().toString();
        if (serverName == null || serverName.equals("")) {
            domainName = "";
        } else {
            serverName = serverName.toLowerCase();
            serverName = serverName.substring(7);
            final int end = serverName.indexOf("/");
            serverName = serverName.substring(0, end);
            if (serverName.indexOf(":") > 0) {
                String[] ary = serverName.split("\\:");
                serverName = ary[0];
            }

            final String[] domains = serverName.split("\\.");
            int len = domains.length;
            if (len > 3 && !isIp(serverName)) {
                // www.xxx.com.cn
                //tomcat8.5以后去除.
                //domainName = "." + domains[len - 3] + "." + domains[len - 2] + "." + domains[len - 1];
                domainName = domains[len - 3] + "." + domains[len - 2] + "." + domains[len - 1];
            } else if (len <= 3 && len > 1) {
                // xxx.com or xxx.cn
                //tomcat8.5以后去除.
                //domainName = "." + domains[len - 2] + "." + domains[len - 1];
                domainName = domains[len - 2] + "." + domains[len - 1];
            } else {
                domainName = serverName;
            }
        }
        return domainName;
    }