JAVA:获取用户访问ip地址

2023-04-02 00:06| 来源: 网络整理| 查看: 265

为何使用该工具类

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。

如：X-Forwarded-For：192.168.1.110, 192.168.1.120, 192.168.1.130, 则真实Id为：192.168.1.100

工具代码 import org.apache.commons.lang.ArrayUtils; import org.apache.commons.lang.StringUtils; import javax.servlet.http.HttpServletRequest; /** * 获取用户访问ip地址 */ public class IpUtil { public static String getIpAddress(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(); } // 获取到多个ip时取第一个作为客户端真实ip if (StringUtils.isNotEmpty(ip) && ip.contains(",")) { String[] ipArray = ip.split(","); if (ArrayUtils.isNotEmpty(ipArray)) { ip = ipArray[0]; } } return ip; } } Controller调用代码 @RequestMapping("/urlName.do") public String MethodName(HttpServletRequest request){ String ip = IpUtil.getIpAddress(request); return ip; } 注意Nginx反向代理问题

现在很多服务都用上了nginx做反向代理，如果用了反向代理，获取到的是nginx的ip地址，需要对nginx反向代理做以下配置

location / { proxy_pass http://127.0.0.1:10678; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header REMOTE-HOST $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; }

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