获得来访IP

 

     public static String getIp(HttpServletRequest req) {
         String ip_for = req.getHeader("x-forwarded-for");
         String ip_client = req.getHeader("http_client_ip");
         String un = "unknown";

         if (ip_for != null && !ip_for.equalsIgnoreCase(un)
                 && ip_for.trim().length() > 0) {
             return ip_for;
         } else if (ip_client != null && !ip_client.equalsIgnoreCase(un)
                 && ip_client.trim().length() > 0) {
             return ip_client;
         } else {
             return req.getRemoteAddr();
         }

1. public static String getRemoteAddress(HttpServletRequest request){   
2.     String ip = request.getHeader("x-forwarded-for");   
3.     if(ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) ip = request.getHeader("Proxy-Client-IP");   
4.     if(ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) ip = request.getHeader("WL-Proxy-Client-IP");   
5.     if(ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) ip = request.getRemoteAddr();   
6.     return ip;   
7. }