获取处理前URL

        StringBuffer backUrl = new StringBuffer();
        backUrl.append("http://").append(request.getServerName());
        if (request.getServerPort() != 80)
        {
            backUrl.append(":").append(request.getServerPort());
        }
        backUrl.append(request.getContextPath()).append(request.getServletPath()).append("?").append(
                request.getQueryString());
        ServletActionContext.getRequest().getSession().setAttribute(WapstoreOnlineConstants.SESSION_WAP_RESURL,
                backUrl.toString());
        return backUrl.toString();