Echarts 数据视图 生成Excel的方法
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2022-03-14 08:45:48
一、生成Excel，两大方向：1后台生成Excel 查询数据库，使用NOPI生产Excel。2前台js生成Excel三种方式1）jquery.table2excel.js --采用，优势：兼容IE和Chrome。 2）handsontable 0.32.0 问题：不兼容IE。3）手写js有兼容性问题 ......
一、生成Excel，两大方向：
1后台生成Excel
查询数据库，使用NOPI生产Excel。
2前台js生成Excel三种方式
1）jquery.table2excel.js
--采用，优势：兼容IE和Chrome。
2）handsontable 0.32.0
问题：不兼容IE。
3）手写js有兼容性问题。
问题：浏览器兼容型问题等。
考虑到这里只需要将Echarts的数据视图生成Excel，采用最简单有效的方式：jquery.table2excel.js。
二、方案
1、 jquery.table2excel.js 和Echarts数据视图结合的取巧方案
第一步：应用js脚本，先jquery脚本后table2excel脚本。
<script src="~/Scripts/jquery-1.10.2.js"></script> <script src="~/Scripts/table2excel/jquery.table2excel.js"></script>
第二步：重写dataView-contentToOption方法，注意不能设为只读。
toolbox: {
right: '20px',
feature: {
dataView: {
show: true,
title: '数据视图',
//readOnly: true, //设置只读，会隐藏刷新按钮。
lang: ['数据视图', '关闭', '导出Excel'],
contentToOption: function (opts) {
$("#tableExcel_Day").table2excel({
exclude: ".noExl", //过滤位置的 css 类名
filename: productSelectName + '每日价格走势图' + ".xls", //文件名称
name: "Excel Document Name.xls",
exclude_img: true,
exclude_links: true,
exclude_inputs: true
});
},
optionToContent: function (opt) {
// console.log(opt);
var axisData = opt.xAxis[0].data; //坐标数据
var series = opt.series; //折线图数据
var tdHeads = '<td style="padding: 0 10px">时间</td>'; //表头第一列
var tdBodys = ''; //表数据
//组装表头
var nameData = new Array('田头价格', '批发价格', '零售价格', '交易量');
for (var i = 0; i < nameData.length; i++) {
tdHeads += '<td style="padding: 0 10px">' + nameData[i] + '</td>';
}
var table = '<table id="tableExcel_Day" border="1" class="table-bordered table-striped" style="width:100%;text-align:center" ><tbody><tr>' + tdHeads + ' </tr>';
//组装表数据
for (var i = 0, l = axisData.length; i < l; i++) {
for (var j = 0; j < series.length ; j++) {
var temp = series[j].data[i];
if (temp != null && temp != undefined) {
tdBodys += '<td>' + temp.toFixed(2) + '</td>';
} else {
tdBodys += '<td></td>';
}
}
table += '<tr><td style="padding: 0 10px">' + axisData[i] + '</td>' + tdBodys + '</tr>';
tdBodys = '';
}
table += '</tbody></table>';
// console.log(table);
return table;
}
},
dataZoom: { show: true, title: { zoom: '区域缩放', back: '区域缩放还原' } },
saveAsImage: { show: true }
}
},
解释 1、通过id即tableExcel_Day来找到表格。
2、exclude: “.noExl” ： 有class = “noExl” 的行不被导出；
第三步：效果图
点击“导出Excel”
存在的问题：点击“生成Excel”按钮后，视图会跳转，因为这是原本是刷新按钮，目前还未解决。
三、jquery.table2excel.js 脚本：
/*
* jQuery table2excel - v1.1.1
* jQuery plugin to export an .xls file in browser from an HTML table
* https://github.com/rainabba/jquery-table2excel
*
* Made by rainabba
* Under MIT License
*/
/*
* jQuery table2excel - v1.1.1
* jQuery plugin to export an .xls file in browser from an HTML table
* https://github.com/rainabba/jquery-table2excel
*
* Made by rainabba
* Under MIT License
*/
//table2excel.js
;(function ( $, window, document, undefined ) {
var pluginName = "table2excel",
defaults = {
exclude: ".noExl",
name: "Table2Excel",
filename: "table2excel",
fileext: ".xls",
exclude_img: true,
exclude_links: true,
exclude_inputs: true
};
// The actual plugin constructor
function Plugin ( element, options ) {
this.element = element;
// jQuery has an extend method which merges the contents of two or
// more objects, storing the result in the first object. The first object
// is generally empty as we don't want to alter the default options for
// future instances of the plugin
//
this.settings = $.extend( {}, defaults, options );
this._defaults = defaults;
this._name = pluginName;
this.init();
}
Plugin.prototype = {
init: function () {
var e = this;
var utf8Heading = "<meta http-equiv=\"content-type\" content=\"application/vnd.ms-excel; charset=UTF-8\">";
e.template = {
head: "<html xmlns:o=\"urn:schemas-microsoft-com:office:office\" xmlns:x=\"urn:schemas-microsoft-com:office:excel\" xmlns=\"http://www.w3.org/TR/REC-html40\">" + utf8Heading + "<head><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets>",
sheet: {
head: "<x:ExcelWorksheet><x:Name>",
tail: "</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet>"
},
mid: "</x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head><body>",
table: {
head: "<table>",
tail: "</table>"
},
foot: "</body></html>"
};
e.tableRows = [];
// get contents of table except for exclude
$(e.element).each( function(i,o) {
var tempRows = "";
$(o).find("tr").not(e.settings.exclude).each(function (i,p) {
tempRows += "<tr>";
$(p).find("td,th").not(e.settings.exclude).each(function (i,q) { // p did not exist, I corrected
var rc = {
rows: $(this).attr("rowspan"),
cols: $(this).attr("colspan"),
flag: $(q).find(e.settings.exclude)
};
if( rc.flag.length > 0 ) {
tempRows += "<td> </td>"; // exclude it!!
} else {
if( rc.rows & rc.cols ) {
tempRows += "<td>" + $(q).html() + "</td>";
} else {
tempRows += "<td";
if( rc.rows > 0) {
tempRows += " rowspan=\'" + rc.rows + "\' ";
}
if( rc.cols > 0) {
tempRows += " colspan=\'" + rc.cols + "\' ";
}
tempRows += "/>" + $(q).html() + "</td>";
}
}
});
tempRows += "</tr>";
// console.log(tempRows);
});
// exclude img tags
if(e.settings.exclude_img) {
tempRows = exclude_img(tempRows);
}
// exclude link tags
if(e.settings.exclude_links) {
tempRows = exclude_links(tempRows);
}
// exclude input tags
if(e.settings.exclude_inputs) {
tempRows = exclude_inputs(tempRows);
}
e.tableRows.push(tempRows);
});
e.tableToExcel(e.tableRows, e.settings.name, e.settings.sheetName);
},
tableToExcel: function (table, name, sheetName) {
var e = this, fullTemplate="", i, link, a;
e.format = function (s, c) {
return s.replace(/{(\w+)}/g, function (m, p) {
return c[p];
});
};
sheetName = typeof sheetName === "undefined" ? "Sheet" : sheetName;
e.ctx = {
worksheet: name || "Worksheet",
table: table,
sheetName: sheetName
};
fullTemplate= e.template.head;
if ( $.isArray(table) ) {
for (i in table) {
//fullTemplate += e.template.sheet.head + "{worksheet" + i + "}" + e.template.sheet.tail;
fullTemplate += e.template.sheet.head + sheetName + i + e.template.sheet.tail;
}
}
fullTemplate += e.template.mid;
if ( $.isArray(table) ) {
for (i in table) {
fullTemplate += e.template.table.head + "{table" + i + "}" + e.template.table.tail;
}
}
fullTemplate += e.template.foot;
for (i in table) {
e.ctx["table" + i] = table[i];
}
delete e.ctx.table;
var isIE = /*@cc_on!@*/false || !!document.documentMode; // this works with IE10 and IE11 both :)
//if (typeof msie !== "undefined" && msie > 0 || !!navigator.userAgent.match(/Trident.*rv\:11\./)) // this works ONLY with IE 11!!!
if (isIE) {
if (typeof Blob !== "undefined") {
//use blobs if we can
fullTemplate = e.format(fullTemplate, e.ctx); // with this, works with IE
fullTemplate = [fullTemplate];
//convert to array
var blob1 = new Blob(fullTemplate, { type: "text/html" });
window.navigator.msSaveBlob(blob1, getFileName(e.settings) );
} else {
//otherwise use the iframe and save
//requires a blank iframe on page called txtArea1
txtArea1.document.open("text/html", "replace");
txtArea1.document.write(e.format(fullTemplate, e.ctx));
txtArea1.document.close();
txtArea1.focus();
sa = txtArea1.document.execCommand("SaveAs", true, getFileName(e.settings) );
}
} else {
var blob = new Blob([e.format(fullTemplate, e.ctx)], {type: "application/vnd.ms-excel"});
window.URL = window.URL || window.webkitURL;
link = window.URL.createObjectURL(blob);
a = document.createElement("a");
a.download = getFileName(e.settings);
a.href = link;
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
}
return true;
}
};
function getFileName(settings) {
return ( settings.filename ? settings.filename : "table2excel" );
}
// Removes all img tags
function exclude_img(string) {
var _patt = /(\s+alt\s*=\s*"([^"]*)"|\s+alt\s*=\s*'([^']*)')/i;
return string.replace(/<img[^>]*>/gi, function myFunction(x){
var res = _patt.exec(x);
if (res !== null && res.length >=2) {
return res[2];
} else {
return "";
}
});
}
// Removes all link tags
function exclude_links(string) {
return string.replace(/<a[^>]*>|<\/a>/gi, "");
}
// Removes input params
function exclude_inputs(string) {
var _patt = /(\s+value\s*=\s*"([^"]*)"|\s+value\s*=\s*'([^']*)')/i;
return string.replace(/<input[^>]*>|<\/input>/gi, function myFunction(x){
var res = _patt.exec(x);
if (res !== null && res.length >=2) {
return res[2];
} else {
return "";
}
});
}
$.fn[ pluginName ] = function ( options ) {
var e = this;
e.each(function() {
if ( !$.data( e, "plugin_" + pluginName ) ) {
$.data( e, "plugin_" + pluginName, new Plugin( this, options ) );
}
});
// chain jQuery functions
return e;
};
})( jQuery, window, document );
参考过的文章：https://blog.csdn.net/wwp231/article/details/51675023