怎样让网页中的路径跟随网络地址的变化而变化

Question

用相对路径，
取得应用跟路径+相对路径

Answer 1

String remoteHost = "";
            int remotePort = request.getServerPort();
            String remoteAdd = request.getRequestURL().toString();            remoteAdd = remoteAdd.substring(7);
            int location = remoteAdd.indexOf("/");
            remoteAdd = remoteAdd.substring(0, location);            if ( ("127.0.0.1".equals(remoteAdd.trim())) || ("localhost".equals(remoteAdd.trim())))
            {
                InetAddress inetAdd = InetAddress.getLocalHost();
                remoteAdd = inetAdd.getHostAddress();
            }
            if (80 == remotePort)
            {
                remoteHost = "http://" + remoteAdd;
            }
            else
            {
                remoteHost = "http://" + remoteAdd + ":" + remotePort;
            }