//重置session会话

public static void resetSession(HttpServletRequest request){

    HttpSession session = request.getSession();

    //复制原session到临时变量

    HashMap old = new HashMap();

Enumeration keys = session.getAttributeNames();

while (keys.hasMoreElements()){

String key = (String) keys.nextElement();

old.put(key, session.getAttribute(key));

session.removeAttribute(key);

}

    //原session销毁

    session.invalidate();

    //获取新的session

    session = request.getSession(true);

    //复制session

    for (Iterator it = old.entrySet().iterator(); it.hasNext();) {

Map.Entry entry = (Map.Entry) it.next();

session.setAttribute((String) entry.getKey(), entry.getValue());

}

}