内外网IP规则

/**
     * 是否为内网IP flag = true 为内网
     * 
     * @param ip
     * @return
     */
    public static boolean ipNetFilter(String ip) {
        Boolean flag = Boolean.FALSE;
        if (StringUtils.isNotBlank(ip)) {
            //String regex = "(127[.]0[.]0[.]1)|(localhost)|(10[.]\\d{1,3}[.]\\d{1,3}[.]\\d{1,3})|(172[.]((1[6-9])|(2\\d)|(3[01]))[.]\\d{1,3}[.]\\d{1,3})|(192[.]168[.]\\d{1,3}[.]\\d{1,3})";
            String regex = "(127[.]0[.]0[.]1)|(localhost)|(172[.]((1[6-9])|(2\\d)|(3[01]))[.]\\d{1,3}[.]\\d{1,3})|(192[.]168[.]\\d{1,3}[.]\\d{1,3})";
            Pattern pattern = Pattern.compile(regex);
            Matcher matcher = pattern.matcher(ip);
            flag = matcher.matches();
        }
        return flag;
    }