jsp页面获取ip

假如用代理服务器，request.getRemoteAddr(); 只能得到代理服务器地址
以下方法是得到正确所有ip的方法
在jsp声明这个函数
<%!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;
}%>
嵌入jsp网页中，然后用<%String ip=getIpAddr(request);%>得到访问者ip
ip就是访问者的ip，你保存到数据库或者缓存中，就由你自己了