系列文章目录

1. datatable 自定义筛选按钮的解决方案
2. Echarts实战案例代码(21)：front-endPage的CJJTable前端分页插件ajax分页异步加载数据的解决方案

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前言

Datatables是一款jquery表格插件，jquery表格插件是一个高度灵活的工具，可以将任何HTML表格添加高级的交互功能。

• 分页，即时搜索和排序
• 几乎支持任何数据源：DOM， javascript， Ajax 和 服务器处理
• 支持不同主题 DataTables, jQuery UI, Bootstrap, Foundation
• 各式各样的扩展: Editor, TableTools, FixedColumns
• 丰富多样的option和强大的API
• 超过2900+个单元测试
• 免费开源

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一、html容器构建

1.操作按钮

<!--操作按钮-->
<div class="btn-group"><button id="reload" class="searchBtn progress">刷新</button><button id="all" class="searchBtn all">全部</button><button id="total" class="searchBtn all">总量</button>
<!--    <button id="progress" class="searchBtn stopped">A相电流</button><button id="alerted" class="searchBtn stopped">B相电流</button><button id="closed" class="searchBtn stopped">C相电流</button>-->
</div>

2.表格构建

<table id="example" class="display panel" role="grid" aria-describedby="example_info"><thead><tr align="center"><td></td><td></td><td colspan="6" class="tablebg2">月电量 <span style="color: #e60000;font-size: 10px;">Kwh</span></td><td colspan="3" class="tablebg1">年电量 <span style="color: #e60000;font-size: 10px;">Kwh</span></td><td colspan="3" class="tablebg2">电流  <span style="color: #e60000;font-size: 10px;">A</span></td><td class="tablebg1">功率  <span style="color: #e60000;font-size: 10px;">W</span></td></tr><tr align="center"><td>序号</td><td>位置</td><td class="tablebg2">{'0'|getPowerDate:'0'}</td><td class="tablebg2">{'0'|getPowerDate:'-1'}</td><td class="tablebg2">{'0'|getPowerDate:'-2'}</td><td class="tablebg2">{'0'|getPowerDate:'-3'}</td><td class="tablebg2">{'0'|getPowerDate:'-4'}</td><td class="tablebg2">{'0'|getPowerDate:'-5'}</td><td class="tablebg1">{'1'|getPowerDate:'0'}</td><td class="tablebg1">{'1'|getPowerDate:'-1'}</td><td class="tablebg1">{'1'|getPowerDate:'-2'}</td><td class="tablebg2">A相电流</td><td class="tablebg2">B相电流</td><td class="tablebg2">C相电流</td><td class="tablebg1">电功率</td></tr></thead><tbody></tbody>
</table>

二、时间日期计算

/*时间表头* $type 0月份1年份;* $inter 时间间隔
*/
function getPowerDate($type, $inter)
{//返回月份if ($type == 0) {return date("Y-m", strtotime("" . $inter . " month"));}//返回年份if ($type == 1) {return date("Y", strtotime("" . $inter . " year"));}
}

三、dataTables属性配置

1.调用

使用DataTables很简单，只需要引入两个文件， 一个css样式文件和DataTables本身的脚本文件。

    <link rel="stylesheet" href="css/jquery.dataTables.css"><script type="text/javascript" src="js/jquery.dataTables.js"></script>

2.过滤按钮

//重载页面;$("#reload").click(function () {window.location.href = window.location.href;})$('#all').on('click', function () {$('.dataTables_filter [type=search]').val("").keyup();});$('#progress').on('click', function () {$('.dataTables_filter [type=search]').val("A相电流").keyup();});$('#alerted').on('click', function () {$('.dataTables_filter [type=search]').val("A相电流").keyup();});$('#closed').on('click', function () {$('.dataTables_filter [type=search]').val("C相电流").keyup();});$('#total').on('click', function () {$('.dataTables_filter [type=search]').val("总量").keyup();});

3.异步加载数据

    $.ajax({type: 'get',async: true,data: {},url: 'api/api.php?act=getIotPower&token=3cab7ce4142608c0f40c785b5ab5ca24',dataType: "json",success: function (res) {//核心代码} else {//无数据判断}},error: function (err) {console.log(err);}

4.核心代码

DataTable属性配置

$('#example').DataTable({dom: '<"searchBox"lf>t<"dtPage"i>p',//控件位置bFilter: true,//过滤搜索pagingType: "first_last_numbers",//分页样式pageLength: 15,//默认显示条数;bPaginate: true,//分页总开关lengthMenu: [15, 25, 50, 75, 100, 200],language: {emptyTable: '没有数据',loadingRecords: '加载中...',processing: '查询中...',search: '搜索：',lengthMenu: '每页 _MENU_ 条数据',zeroRecords: '没有数据',paginate: {'first': '首页','last': '尾页','next': '下一页','previous': '上一页'},info: '共计：_TOTAL_ 条数据',infoEmpty: '没有数据',infoFiltered: '(过滤 _MAX_ 条)',}});

数据运算

var json = res.data;//console.log(json);var html = '';if (res.data != null) {for (var i = 0; i < json.length; i++) {var sensor = json[i].data.propertyType;var b_yesterday_val = json[i].odata.b_yesterday_val.split(",");var yesterday_val = json[i].odata.yesterday_val.split(",");var last_month_val = json[i].odata.last_month_val.split(",");//1月var b_last_month_val = json[i].odata.b_last_month_val.split(",");//2月var last_year_val = json[i].odata.last_year_val.split(",");var b_last_year_val = json[i].odata.b_last_year_val.split(",");var three_days_ago_val = json[i].odata.three_days_ago_val.split(",");var three_month_ago_val = json[i].odata.three_month_ago_val.split(",");//3月var three_years_ago_val = json[i].odata.three_years_ago_val.split(",");var four_month_ago_val = json[i].odata.four_month_ago_val.split(",");//4月var five_month_ago_val = json[i].odata.five_month_ago_val.split(",");//5月var six_month_ago_val = json[i].odata.six_month_ago_val.split(",");//6月var normValue = json[i].sdata.split(",");var sta = json[i].data.sensorStatus;var norm = sensor.split(",");var staValue = sta.split(",");//新增当日/月/年数据 2022.07.23 BY poleung;var today_val = json[i].odata.today_val.split(",");var current_month = json[i].odata.current_month.split(",");//当月var current_year = json[i].odata.current_year.split(",");//console.log(today_val);//数据排序，防止错乱;var normT = [], statusT = [], b_yesterday = [], yesterday = [], b_last_month = [], last_month = [],four_month = [],five_month = [],six_month = [],b_last_year = [], last_year = [];for (var j = 0; j < norm.length; j++) {//日用量if (norm.indexOf("电量") == -1) {normT[0] = "-";statusT[0] = "无设备";} else {if (norm[j] == "电量") {//normT[0] = parseFloat(normValue[j] - yesterday_val[j]).toFixed(2);normT[0] = getPositive(parseFloat(today_val[j] - yesterday_val[j]).toFixed(2));//今天statusT[0] = staValue[j];yesterday[0] = getPositive(parseFloat(yesterday_val[j] - b_yesterday_val[j]).toFixed(2));b_yesterday[0] = getPositive(parseFloat(b_yesterday_val[j] - three_days_ago_val[j]).toFixed(2));}}//月用量if (norm.indexOf("电量") == -1) {normT[1] = "-";statusT[1] = "无设备";} else {if (norm[j] == "电量") {statusT[1] = staValue[j];normT[1] = getPositive(parseFloat(current_month[j] - last_month_val[j]).toFixed(2));//1last_month[1] = getPositive(parseFloat(last_month_val[j] - b_last_month_val[j]).toFixed(2));//2b_last_month[1] = getPositive(parseFloat(b_last_month_val[j] - three_month_ago_val[j]).toFixed(2));//3four_month[1] = getPositive(parseFloat(three_month_ago_val[j] - four_month_ago_val[j]).toFixed(2));//4five_month[1] = getPositive(parseFloat(four_month_ago_val[j] - five_month_ago_val[j]).toFixed(2));//5six_month[1] = getPositive(parseFloat(five_month_ago_val[j] - six_month_ago_val[j]).toFixed(2));//6}}//年用量if (norm.indexOf("电量") == -1) {normT[2] = "-";statusT[2] = "无设备";} else {if (norm[j] == "电量") {normT[2] = getPositive(parseFloat(current_year[j] - last_year_val[j]).toFixed(2));statusT[2] = staValue[j];last_year[2] = getPositive(parseFloat(last_year_val[j] - b_last_year_val[j]).toFixed(2));b_last_year[2] = getPositive(parseFloat(b_last_year_val[j] - three_years_ago_val[j]).toFixed(2));}}if (norm.indexOf("A相电流") == -1) {normT[3] = "-";statusT[3] = "无设备";} else {if (norm[j] == "A相电流") {normT[3] = parseFloat(today_val[j]).toFixed(2);statusT[3] = staValue[j];}}if (norm.indexOf("B相电流") == -1) {normT[4] = "-";statusT[4] = "无设备";} else {if (norm[j] == "B相电流") {normT[4] = parseFloat(today_val[j]).toFixed(2);statusT[4] = staValue[j];}}if (norm.indexOf("C相电流") == -1) {normT[5] = "-";statusT[5] = "无设备";} else {if (norm[j] == "C相电流") {normT[5] = parseFloat(today_val[j]).toFixed(2);statusT[5] = staValue[j];}}if (norm.indexOf("电功率") == -1) {normT[6] = "-";statusT[6] = "无设备";} else {if (norm[j] == "电功率") {normT[6] = parseFloat(today_val[j]).toFixed(2);statusT[6] = staValue[j];}}}//构建表格;html = "<tr><td>" + json[i].device_seq + "</td><td>"+ json[i].device + "</td><td class=\"tablebg1\">"+ normT[1] + "</td><td class=\"tablebg2\">"+ last_month[1] + "</td><td class=\"tablebg1\">"+ b_last_month[1] + "</td><td class=\"tablebg2\">"+ four_month[1] + "</td><td class=\"tablebg1\">"+ five_month[1] + "</td><td class=\"tablebg2\">"+ six_month[1] + "</td><td class=\"tablebg1\">"+ normT[2] + "</td><td class=\"tablebg1\">"+ last_year[2] + "</td><td class=\"tablebg1\">"+ b_last_year[2] + "</td><td>"+makeBold(normT[3],statusT[3])+"</td><td>"+makeBold(normT[4],statusT[4])+"</td><td>"+makeBold(normT[5],statusT[5])+"</td><td class=\"tablebg1\">"+makeBold(normT[6],statusT[6])+"</td></tr>";//渲染表格;$("#example tbody").append(html);}

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总结

Datatables是一直接触的jquery表格插件，但仅限于项目部分功能的使用，因此对该插件也是用到时学习，满足了当前的需求就浅尝辄止了。但是随着同一个项目需求的不断变化，反正Datatables带来的惊喜：只有你没想到的功能，没有它实现不了的需求。因而为此记！
@漏刻有时