使用nginx代理，后台怎么获取真实的IP

1.在nginx.conf配置中加入配置信息

proxy_set_header Host $http_host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-NginX-Proxy true;

2.然后再后台获取真实IP

public static String getIpAddr(HttpServletRequest request) {
        String ip = null;
        try {
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip) || LOCALHOST.equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_X_FORWARDED_FOR");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip) || LOCALHOST.equalsIgnoreCase(ip)) {
                ip = request.getHeader("X-Forwarded-For");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip) || LOCALHOST.equalsIgnoreCase(ip)) {
                ip = request.getHeader("X-Real-IP");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip) || LOCALHOST.equalsIgnoreCase(ip)) {
                ip = request.getRemoteAddr();
            }
        } catch (Exception e) {
            logger.error("IPUtils ERROR ", e);
        }

        //        //使用代理，则获取第一个IP地址
        //        if(StringUtils.isEmpty(ip) && ip.length() > 15) {
        //          if(ip.indexOf(",") > 0) {
        //              ip = ip.substring(0, ip.indexOf(","));
        //          }
        //      }

        return ip;
    }