java通过请求对象获取ip地址、获取ip地址

    /**
     * 获取登录ip
     */
    public String getIp(){
        HttpServletRequest request = this.getRequest();
        String ip = "";
        if (request.getHeader("x-forwarded-for") == null) {
            ip = request.getRemoteAddr();
        }else{
            ip = request.getHeader("x-forwarded-for");
        }
        return ip;
    }