获取请求ip

public static String getUserIp(HttpServletRequest request) {
   if (ObjectUtils.isEmpty(request)){
        return null;
    }
    // 获取客户端前台IP进行解析
    String userIp = request.getHeader("x-forwarded-for");
    if (userIp == null || userIp.isEmpty() || "unknown".equalsIgnoreCase(userIp)) {
        userIp = request.getHeader("Proxy-Client-IP");
    }
    if (userIp == null || userIp.isEmpty() || "unknown".equalsIgnoreCase(userIp)) {
        userIp = request.getHeader("WL-Proxy-Client-IP");
    }
    if (userIp == null || userIp.isEmpty() || "unknown".equalsIgnoreCase(userIp)) {
        userIp = request.getRemoteAddr();
    }
    return userIp;
}

/**
 * 从Request对象中获得客户端IP，处理了HTTP代理服务器和Nginx的反向代理截取了ip
 *
 * @param request
 * @return ip
 */
public static String getLocalIp(HttpServletRequest request) {
    String remoteAddr = request.getRemoteAddr();
    String forwarded = request.getHeader("X-Forwarded-For");
    String realIp = request.getHeader("X-Real-IP");
    String ip;
    if (realIp == null) {
        if (forwarded == null) {
            ip = remoteAddr;
        } else {
            ip = remoteAddr + "/" + forwarded.split(",")[0];
        }
    } else {
        if (realIp.equals(forwarded)) {
            ip = realIp;
        } else {
            if (forwarded != null) {
                forwarded = forwarded.split(",")[0];
            }
            ip = realIp + "/" + forwarded;
        }
    }
    return ip;
}