获取IP地址工具类

快来打我* 2022-05-12 04:00 332阅读 0赞

## 权限系统IP工具类 ##

@Slf4j
    public class IpUtil { 
    
        public final static String ERROR_IP = "127.0.0.1";
    
        public final static Pattern pattern = Pattern.
                compile("(2[5][0-5]|2[0-4]\\d|1\\d{2}|\\d{1,2})\\.(25[0-5]|2[0-4]\\d|1\\d{2}|\\d{1,2})\\.(25[0-5]|2[0-4]\\d|1\\d{2}|\\d{1,2})\\.(25[0-5]|2[0-4]\\d|1\\d{2}|\\d{1,2})");
    
        /** * 取外网IP * * @param request * @return */
        public static String getRemoteIp(HttpServletRequest request) {
            String ip = request.getHeader("x-real-ip");
            if (ip == null) {
                ip = request.getRemoteAddr();
            }
    
            //过滤反向代理的ip
            String[] stemps = ip.split(",");
            if (stemps != null && stemps.length >= 1) {
                //得到第一个IP，即客户端真实IP
                ip = stemps[0];
            }
    
            ip = ip.trim();
            if (ip.length() > 23) {
                ip = ip.substring(0, 23);
            }
    
            return ip;
        }
    
        /** * 获取用户的真实ip * * @param request * @return */
        public static String getUserIP(HttpServletRequest request) {
    
            // 优先取X-Real-IP
            String ip = request.getHeader("X-Real-IP");
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("x-forwarded-for");
            }
    
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getRemoteAddr();
                if ("0:0:0:0:0:0:0:1".equals(ip)) {
                    ip = ERROR_IP;
                }
            }
    
            if ("unknown".equalsIgnoreCase(ip)) {
                ip = ERROR_IP;
                return ip;
            }
    
            int pos = ip.indexOf(',');
            if (pos >= 0) {
                ip = ip.substring(0, pos);
            }
    
            return ip;
        }
    
        public static String getLastIpSegment(HttpServletRequest request) {
            String ip = getUserIP(request);
            if (ip != null) {
                ip = ip.substring(ip.lastIndexOf('.') + 1);
            } else {
                ip = "0";
            }
            return ip;
        }
    
        public static boolean isValidIP(HttpServletRequest request) {
            String ip = getUserIP(request);
            return isValidIP(ip);
        }
    
        /** * 判断我们获取的ip是否是一个符合规则ip * * @param ip * @return */
        public static boolean isValidIP(String ip) {
            if (StringUtils.isEmpty(ip)) {
                log.debug("ip is null. valid result is false");
                return false;
            }
    
            Matcher matcher = pattern.matcher(ip);
            boolean isValid = matcher.matches();
            log.debug("valid ip:" + ip + " result is: " + isValid);
            return isValid;
        }
    
        public static String getLastServerIpSegment() {
            String ip = getServerIP();
            if (ip != null) {
                ip = ip.substring(ip.lastIndexOf('.') + 1);
            } else {
                ip = "0";
            }
            return ip;
        }
    
        public static String getServerIP() {
            InetAddress inet;
            try {
                inet = InetAddress.getLocalHost();
                String hostAddress = inet.getHostAddress();
                return hostAddress;
            } catch (UnknownHostException e) {
                e.printStackTrace();
            }
            return "127.0.0.1";
        }
    }

## 使用 ##

user.setOperateIp(IpUtil.getRemoteIp(RequestHolder.getCurrentRequest()));