获取访问客户端的IP地址

从js中获取访问客户端的IP地址
<script language="JavaScript">
function GetLocalIPAddr(){
var oSetting = null;
var ip = null;
try{
oSetting = new ActiveXObject("rcbdyctl.Setting");
ip = oSetting.GetIPAddress;

if (ip.length == 0){
return "没有连接到Internet";
}
oSetting = null;
}catch(e){
return ip;
}
return ip;
}
alert(GetLocalIPAddr());
</script>


从后台代码中获取客户端的IP地址
HttpServletRequest servletRequest = new HttpServletRequest()
servletRequest.getRemoteAddr()；//ip地址