layui如何实现数据分页功能

我们先来看下官网的演示画面。

具体代码：

页面引入layui.css、 layui.js

<div id="pTable"   style="max-width:90%">
  <table class="layui-table" id="layui_table_id" lay-filter="test">
  </table>
<div id="laypage"></div>
 </div>

前台js

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);

业务逻辑层

@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();
  }

sql

其中sql在计算总数totle时可以这么写

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