<%
              String list ="";
              //从客户端获得Cookies集合
              Cookie[] cookies = request.getCookies();
              //遍历这个Cookies集合
              if(cookies!=null&&cookies.length>0)
              {
                  for(Cookie c:cookies)
                  {
                      if(c.getName().equals("ListViewCookie"))
                      {
                         list = c.getValue();
                      }
                  }
              }
              
              list+=request.getParameter("id")+",";
              //如果浏览记录超过1000条，清零.
              String[] arr = list.split(",");
              if(arr!=null&&arr.length>0)
              {
                  if(arr.length>=1000)
                  {
                      list="";
                  }
              }
              Cookie cookie = new Cookie("ListViewCookie",list);
              response.addCookie(cookie);
          
          %>

明明listviewCookie是后面才创建的，但在前面就引用，这样可以么，代码执行顺序不是从上到下？还是因为先编译完了，对象都加载完了，所以调用没关系？不是很清楚。