java 获取远程IP地址的有关问题_J2EE

java 获取远程IP地址的问题？

代码如下：

Java code

     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;                }

在本地就可以的，但是上传到服务器获得的不是真实的IP

这就为什么呢？

系统中有用户总就刷机，就是不断点击网站，现在想看下是哪里的IP访问的？

------解决方案--------------------

Java code

private String ip(HttpServletRequest req) {        String ip = head(req, "X-Real-IP");        if (ip != null && !"unknown".equalsIgnoreCase(ip)) {            return ip;        }        ip = head(req, "X-Forwarded-For");        if (ip != null && !"unknown".equalsIgnoreCase(ip)) {            // 多次反向代理后会有多个IP值，第一个为真实IP。            int index = ip.indexOf(',');            return (index != -1) ? ip.substring(0, index) : ip;        } else {            return req.getRemoteAddr();        }    }        private String head(HttpServletRequest req, String s){        return req.getHeader(s);    }
------解决方案--------------------
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Java code

private String ip(HttpServletRequest req) {
        String ip = head(req, "X-Real-IP");
        if (ip != null &amp;&amp; !"unknown".equalsIgnoreCase(ip)) {
            return ip;
       ……