@RequestMapping(value = "/getIp", method = RequestMethod.POST)

    @ResponseBody

    public String getIp(HttpServletRequest request) {

        return IpUtil.getIpAddr(request);

    }

public class IpUtil {

    public static String getIpAddr(HttpServletRequest request) {

        String ipAddress = null;

        try {

            ipAddress = request.getHeader("x-forwarded-for");

            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {

                ipAddress = request.getHeader("Proxy-Client-IP");

            }

            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {

                ipAddress = request.getHeader("WL-Proxy-Client-IP");

            }

            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {

                ipAddress = request.getRemoteAddr();

                if (ipAddress.equals("127.0.0.1")) {

                    // 根据网卡取本机配置的IP

                    InetAddress inet = null;

                    try {

                        inet = InetAddress.getLocalHost();

                    } catch (UnknownHostException e) {

                        e.printStackTrace();

                    }

                    ipAddress = inet.getHostAddress();

                }

            }

            // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割

            if (ipAddress != null && ipAddress.length() > 15) { // "***.***.***.***".length()

                                                                // = 15

                if (ipAddress.indexOf(",") > 0) {

                    ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));

                }

            }

        } catch (Exception e) {

            ipAddress="";

        }

        // ipAddress = this.getRequest().getRemoteAddr();

        return ipAddress;

    }

}