获取来源IP地址

来源：互联网发布：淘宝上卖的星巴克杯子编辑：程序博客网时间：2024/05/24 01:50

获得客户端真实IP地址的方法一：

public String getRemortIP(HttpServletRequest request) {    if (request.getHeader(”x-forwarded-for”) == null) {        return request.getRemoteAddr();    }    return request.getHeader(”x-forwarded-for”);}

获得客户端真实IP地址的方法二：

public 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.getRemoteAddr();    }    return ip;}

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, 192.168.1.100
用户真实IP为： 192.168.1.110

public String getIp() {        String forwaredFor = getRequest().getHeader("X-Forwarded-For");        String remoteAddr = getRequest().getRemoteAddr();        if (StringUtils.isNotEmpty(forwaredFor)) {            String[] ipArray = forwaredFor.split(",");            return ipArray[0];        } else            return remoteAddr;    }