取得ip

String ipStr = request.getHeader(" x-forwarded-for ");
if (ipStr == null || ipStr.length() == 0 || " unknown ".equalsIgnoreCase(ipStr)) {
ipStr = request.getHeader(" Proxy-Client-IP ");
}
if (ipStr == null || ipStr.length() == 0 || " unknown ".equalsIgnoreCase(ipStr)) {
ipStr = request.getHeader(" WL-Proxy-Client-IP ");
}
if (ipStr == null || ipStr.length() == 0 || " unknown ".equalsIgnoreCase(ipStr)) {
ipStr = request.getRemoteAddr();
}
System.out.println("Client_IP:"+ipStr);