java 获得客户端真是ip地址

 

 /**
     * 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();
    }