创建session

java action:
HttpSession session = request.getSession();
UserSession userSession = new UserSession();
userSession.setUser(user);
session.setAttribute(Constant.USER_SESSION_KEY, userSession);//把UserSession传递到下个页面
...
request.getSession().setAttribute("parentVector", parentV);
request.getSession().setAttribute("childVector", childV);


在其他action中可判断“长时间未操作，请重新登陆！”：
UserSession us = (UserSession) request.getSession().getAttribute(Constant.USER_SESSION_KEY);
if (us == null) {
request.setAttribute("message", "长时间未操作，请重新登陆！");
return mapping.findForward("ajaxhtml");
}

java UserSession:
public class UserSession {
private User user;
public User getUser(){
return user;
}
public void setUser(User user) {
this.user = user;
}
}
java Constant:
public static final String USER_SESSION_KEY = "user_session";

html:
<jsp:useBean id="user_session" scope="session"
type="com.worthtech.billportal.web.session.UserSession" />
<%
com.worthtech.billportal.bean.User user = null;
if (user_session != null)
user = user_session.getUser();

//根据权限获得菜单，这里权限用Telephone替代一下先
String str = user.getTelephone();
%>