IpUtils获取用户请求真实ip工具类
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import org.slf4j.Logger; import org.slf4j.LoggerFactory; import javax.servlet.http.HttpServletRequest; import java.net.InetAddress; import java.net.UnknownHostException; /** * IP工具类 * @author justin.zheng * @date 2020/2/12 15:08 */ public class IpUtils { private static Logger logger = LoggerFactory.getLogger(IpUtils.class); /** * 获取用户真实IP地址,不使用request.getRemoteAddr();的原因是有可能用户使用了代理软件方式避免真实IP地址。 * 可是,如果通过了多级反向代理的话,X-Forwarded-For的值并不止一个,而是一串IP值,究竟哪个才是真正的用户端的真实IP呢? * 答案是取X-Forwarded-For中第一个非unknown的有效IP字符串 * @param request * @return */ public static String getIpAddr(HttpServletRequest request) { String ip = request.getHeader("x-forwarded-for"); if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("Proxy-Client-IP"); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("WL-Proxy-Client-IP"); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("HTTP_CLIENT_IP"); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("HTTP_X_FORWARDED_FOR"); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getRemoteAddr(); if("127.0.0.1".equals(ip)||"0:0:0:0:0:0:0:1".equals(ip)){ //根据网卡取本机配置的IP InetAddress inet=null; try { inet = InetAddress.getLocalHost(); ip= inet.getHostAddress(); } catch (UnknownHostException e) { logger.error("==>getIpAddr error",e); } } } if(ip!=null&&ip.length()>0){ //取第一个非unknown的有效IP字符串 String[] split = ip.split(","); for (String s : split) { if(!"unknown".equalsIgnoreCase(s)){ ip = s; break; } } } return ip; } private IpUtils() { } }
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