layui实现数据分页功能

<div id="pTable" style="width: 1200px;">  <table class="layui-table" id="layui_table_id" lay-filter="test">  </table><div id="laypage"></div> </div>

var limitcount = 10; var curnum = 1; //列表查询方法 function productsearch(productGroupId,start,limitsize) {  layui.use(['table','laypage','laydate'], function(){   var table = layui.table,    laydate=layui.laydate,    laypage = layui.laypage;   table.render({    elem: '#layui_table_id'    , url: '<%=path%>/xx/pListQuery.html?pId='+productGroupId+'¤tPage='+ start+'¤tNumber=' + limitsize    /*, where:{pagename:start,pagelimit:limitsize} //传参*/    , cols: [[     {field: 'productId', title: 'ID', width: '170', sort: true}     , {field: 'productName', title: '名称', width: '450'}     , {field: 'productState', title: '状态', width: '100'}     , {field: 'effectTime', title: '生效时间', width: '120', sort: true}     , {field: 'invalidTime', title: '失效时间', width: '120', sort: true}     , {field: 'productCost', title: '成本', width: '100', sort: true}     , {field: 'poperation', title: '操作', width: '100',fixed: 'right', toolbar: '#barDemo'}    ]]    , page: false    , height: 430    ,done: function(res, curr, count){     //如果是异步请求数据方式，res即为你接口返回的信息。     //如果是直接赋值的方式，res即为：{data: [], count: 99} data为当前页数据、count为数据总长度     laypage.render({      elem:'laypage'      ,count:count      ,curr:curnum      ,limit:limitcount      ,layout: ['prev', 'page', 'next', 'skip','count','limit']      ,jump:function (obj,first) {       if(!first){        curnum = obj.curr;        limitcount = obj.limit;        //console.log("curnum"+curnum);        //console.log("limitcount"+limitcount);        //layer.msg(curnum+"-"+limitcount);        productsearch(productGroupId,curnum,limitcount);       }      }     })    }   })    //监听工具条   table.on('tool(test)', function(obj){ //注：tool是工具条事件名，test是table原始容器的属性 lay-filter="对应的值"    var data = obj.data //获得当前行数据     ,layEvent = obj.event; //获得 lay-event 对应的值    if(layEvent === 'detail'){     viewLableInfo(data.attrId);     layer.msg(data.attrId);    } else if(layEvent === 'del'){     layer.msg('删除');    } else if(layEvent === 'edit'){     layer.msg('编辑操作');    }   });   //常规用法   laydate.render({    elem: '#createDate'   });   //常规用法   laydate.render({    elem: '#processingTime'   });   }); }  var pId = '${pGBean.pgId }';productsearch(pId, curnum, limitcount);

@Override  public String queryList (HttpServletRequest request) {   String total = "";   String pId = request.getParameter("pId");   int currentNumber = Integer.parseInt(request.getParameter("currentNumber"));  String currentPage = request.getParameter("currentPage") == null ? "1" : request.getParameter("currentPage");  //分页处理，显示第一页的30条数据(默认值)  PageHelper.startPage(Integer.parseInt(currentPage), currentNumber);  List<PExl> list = exportDao.queryList (pId);  if(list.size() > 0){   total = list.get(0).getTotal();  }    Page page = PageHelper.localPage.get();  if(page!=null){   page.setCurrentPage(Integer.parseInt(currentPage));  }  PageHelper.endPage();   JSONObject jsonObject = new JSONObject();  jsonObject.put("code", 0);  jsonObject.put("msg", "");  jsonObject.put("count", total);  jsonObject.put("data", list);  //System.out.println("json:----" + jsonObject.toString());  return jsonObject.toString();  }

COUNT(*) OVER(PARTITION BY 1) AS TOTAL