if (null == act || null == content) {
request.setAttribute("errorMsg", "找不到id=" + actId + "的活动");
return "error";
}
content = Misc.escapeHTML(content);
Comment com = act.postComment(user, content);
com.flush();
response.sendRedirect("../activity/activity.jspx?actId="
+ URLEncoder.encode(actId, "utf-8"));
return null;
}