java 访问ip限制功能片段

public ResponseResult login(HttpServletRequest request){
        String userName = request.getParameter("i_username");
        String password = request.getParameter("i_password");
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        if ("0:0:0:0:0:0:0:1".equals(ip)) {
            ip = "127.0.0.1";
        }
        if (ip.split(",").length > 1) {
            ip = ip.split(",")[0];
        }
        System.out.println("--ip--"+ip);
        if(ip.startsWith("172.16")||ip.startsWith("192.168")||ip.startsWith("127.0")){
            ResponseResult result = userService.login(userName, password);
            if(result.getSuccess()) {
                request.getSession().setAttribute("userName", userName);
                request.getSession().setAttribute("user", result.getData());
            }
            return result;
        }else{
            ResponseResult result = userService.getIpState(userName, password);
            if(result.getSuccess()) {
                request.getSession().setAttribute("userName", userName);
                request.getSession().setAttribute("user", result.getData());
            }
            return result;
        }
        
    }