java 获得客户端真是ip地址

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 /**     * ip校验     * @param s     * @return 格式是否正确     */    public Boolean isIpAddress(String s){         String regex = "(((2[0-4]\\d)|(25[0-5]))|(1\\d{2})|([1-9]\\d)|(\\d))[.](((2[0-4]\\d)|(25[0-5]))|(1\\d{2})|([1-9]\\d)|(\\d))[.](((2[0-4]\\d)|(25[0-5]))|(1\\d{2})|([1-9]\\d)|(\\d))[.](((2[0-4]\\d)|(25[0-5]))|(1\\d{2})|([1-9]\\d)|(\\d))";         Pattern p = Pattern.compile(regex);         Matcher m = p.matcher(s);         return m.matches();    }    /**     * 获取客户端ip     * @param request     * @return ip 地址     */    public String getClientAddress(HttpServletRequest request) {        String address = request.getHeader("X-Forwarded-For");        if (address != null && isIpAddress(address)) {            return address;        }        return request.getRemoteAddr();    }