java web 取用户真实ip..包括部分使用代理服务器来上网的用户。但好象对高度匿名的代理服务器是无效的。
public String getIpAddr(HttpServletRequest request) {
String ip = request.getHeader("X-Forwarded-For");
if (ip == null || ip.length() == 0) {
ip = request.getHeader("Proxy-Client-IP");
}
if (ip == null || ip.length() == 0) {
ip = request.getHeader("WL-Proxy-Client-IP");
}
if (ip == null || ip.length() == 0) {
ip = request.getRemoteAddr();
}
return ip;
}