分页技术

//显示会员
 public String vipquery() throws Exception {
  HttpServletRequest request=ServletActionContext.getRequest();
  String hql="from User order by userID desc";
  int nowpage=1;
  
  int pageSize=5;
  if(request.getParameter("nowPage")!=null){
   nowpage = Integer.parseInt(request.getParameter("nowPage"));
  }
  
  int rows=roomService.count(hql);
  
  int pages=rows%pageSize==0?rows/pageSize:rows/pageSize+1;
  
  List<User> viplist=(List<User>) roomService.viplist(hql, pageSize, nowpage);
  
  request.setAttribute("rows", rows);
  request.setAttribute("pages", pages);
  request.setAttribute("nowpage", nowpage);
  request.setAttribute("viplist", viplist);
  
  return "viplist";
  
 }

 

<script type="text/javascript">
function returnPage(v){
      //alert(v);
      var nowP = document.getElementById("nowPage");
      if(v==1){
       //点击的是首页
       nowP.value = 1;
      }else if(v==2){
       //点击的是上一页
       var _nowPage = <%=request.getAttribute("nowpage") %>;
       if(_nowPage<=1){
        //alert("当前已经是第一页，不能再跳了");
        document.getElementById("prevPage").innerHTML = "上一页";
        return;
       }else{
        nowP.value = Number(nowP.value)-1;
       }
      }else if(v==3){
       //点击的是下一页
       var _nowPage = <%=request.getAttribute("nowpage") %>;
       var totalPage = <%=request.getAttribute("pages")%>;
       if(_nowPage>=totalPage){
        //alert("当前已经是最后一页，不能再跳了");
        document.getElementById("nextPage").innerHTML = "下一页";
        return;
       }else{
        nowP.value = Number(nowP.value)+1;
       }
       
      }else if(v==4){
       //点击尾页
       nowP.value = <%=request.getAttribute("pages")%>;
      }
      document.getElementById("myForm").submit();
     }
</script>
 <form action="room_vipquery.do" method="post" id="myForm">
    <input type="hidden" id="nowPage" name="nowPage" value="<%=request.getAttribute("nowpage") %>"/>
 </form>

 <a href="#" onclick="returnPage(1)">首页</a>&nbsp;
 <span id="prevPage"><a href="#" onclick="returnPage(2)">上一页</a></span>&nbsp;
 <span id="nextPage"><a href="#" onclick="returnPage(3)">下一页</a></span>&nbsp;
 <a href="#" onclick="returnPage(4)">尾页</a>