取得用户IP地址
public static String getIpAddress(HttpServletRequest request) {String ip = request.getHeader("X-Forwarded-For");if (StringUtils.isBlank(ip) || StringUtils.equalsIgnoreCase(ip, "unknown")) {ip = request.getHeader("Proxy-Client-IP");}if (StringUtils.isBlank(ip) || StringUtils.equalsIgnoreCase(ip, "unknown")) {ip = request.getHeader("WL-Proxy-Client-IP");}if (StringUtils.isBlank(ip) || StringUtils.equalsIgnoreCase(ip, "unknown")) {ip = request.getHeader("HTTP_CLIENT_IP");}if (StringUtils.isBlank(ip) || StringUtils.equalsIgnoreCase(ip, "unknown")) {ip = request.getHeader("HTTP_X_FORWARDED_FOR");}if (StringUtils.isBlank(ip) || StringUtils.equalsIgnoreCase(ip, "unknown")) {ip = request.getRemoteAddr();}if (StringUtils.isNotBlank(ip) && StringUtils.indexOf(ip, ",") > 0) {String[] ipArray = StringUtils.split(ip, ",");ip = ipArray[0];}return ip;}