Nginx反向代理JAVA获取真实IP

获取客户端真实的IP地址

/**
 * 获取用户ip
 * @param request
 * @return
 */
public static String getIpAddress(HttpServletRequest request) {

    String ip = request.getHeader("X-requested-For");
    if (StringUtils.isBlank(ip) || "unknown".equalsIgnoreCase(ip)) {
        ip = request.getHeader("X-Forwarded-For");
    }
    if (StringUtils.isBlank(ip) || "unknown".equalsIgnoreCase(ip)) {
        ip = request.getHeader("Proxy-Client-IP");
    }
    if (StringUtils.isBlank(ip) || "unknown".equalsIgnoreCase(ip)) {
        ip = request.getHeader("WL-Proxy-Client-IP");
    }
    if (StringUtils.isBlank(ip) || "unknown".equalsIgnoreCase(ip)) {
        ip = request.getHeader("HTTP_CLIENT_IP");
    }
    if (StringUtils.isBlank(ip) || "unknown".equalsIgnoreCase(ip)) {
        ip = request.getHeader("HTTP_X_FORWARDED_FOR");
    }
    if (StringUtils.isBlank(ip) || "unknown".equalsIgnoreCase(ip)) {
        ip = request.getRemoteAddr();
    }

    // 如果是多级代理，那么取第一个ip为客户ip
    if (ip != null && ip.indexOf(",") != -1)
    {
        ip = ip.substring(ip.lastIndexOf(",") + 1, ip.length()).trim();
    }

    return ip;
}