highcharts是国外的一个图表插件，包括各种数据图形展示，柱形图，线性图等等，是手机端和pc端最好的图表插件之一，相比于百度的echarts更加轻便和易懂。链接http://www.hcharts.cn/。之前的highcharts版本都是支持图表导出功能的，导出的可以为图片文件和pdf以及svg文件，为了更加方便地查看图表数据和分析数据，我们还是需要导出具体的series和categories数据，我们的想法是导出为excel文件或者csv文件，以上两者都可以直接用excel打开。
之前也有一篇借用浏览器的ActiveX插件来实现导出excel文件的文章：http://www.stepday.com/topic/?544 今天我们就来扩展一下highcharts如何直接导出csv格式的文件。
根据highcharts官方的扩展组件来看，我们需要下载导出csv的核心js文件：https://rawgithub.com/highslide-software/export-csv/master/export-csv.js 可以点击下载至本地也可以直接在自己的页面内引入，形如：
我们先看一下export-csv源文件。这些文件都是属于highcharts插件，可以去官网插件里找到然后下载使用。
/**
* A Highcharts plugin for exporting data from a rendered chart as CSV, XLS or HTML table
*
* Author: Torstein Honsi
* Licence: MIT
* Version: 1.4.2
*/
/*global Highcharts, window, document, Blob */
(function (factory) {
if (typeof module === 'object' && module.exports) {
module.exports = factory;
} else {
factory(Highcharts);
}
})(function (Highcharts) {
'use strict';
var each = Highcharts.each,
pick = Highcharts.pick,
seriesTypes = Highcharts.seriesTypes,
downloadAttrSupported = document.createElement('a').download !== undefined;
Highcharts.setOptions({
lang: {
downloadCSV: 'Download CSV',
downloadXLS: 'Download XLS',
viewData: 'View data table'
}
});
/**
* Get the data rows as a two dimensional array
*/
Highcharts.Chart.prototype.getDataRows = function () {
var options = (this.options.exporting || {}).csv || {},
xAxis = this.xAxis[0],
rows = {},
rowArr = [],
dataRows,
names = [],
i,
x,
xTitle = xAxis.options.title && xAxis.options.title.text,
// Options
dateFormat = options.dateFormat || '%Y-%m-%d %H:%M:%S',
columnHeaderFormatter = options.columnHeaderFormatter || function (series, key, keyLength) {
return series.name + (keyLength > 1 ? ' ('+ key + ')' : '');
};
// Loop the series and index values
i = 0;
each(this.series, function (series) {
var keys = series.options.keys,
pointArrayMap = keys || series.pointArrayMap || ['y'],
valueCount = pointArrayMap.length,
requireSorting = series.requireSorting,
categoryMap = {},
j;
// Map the categories for value axes
each(pointArrayMap, function (prop) {
categoryMap[prop] = (series[prop + 'Axis'] && series[prop + 'Axis'].categories) || [];
});
if (series.options.includeInCSVExport !== false && series.visible !== false) { // #55
j = 0;
while (j < valueCount) {
names.push(columnHeaderFormatter(series, pointArrayMap[j], pointArrayMap.length));
j = j + 1;
}
each(series.points, function (point, pIdx) {
var key = requireSorting ? point.x : pIdx,
prop,
val;
j = 0;
if (!rows[key]) {
rows[key] = [];
}
rows[key].x = point.x;
// Pies, funnels, geo maps etc. use point name in X row
if (!series.xAxis || series.exportKey === 'name') {
rows[key].name = point.name;
}
while (j < valueCount) {
prop = pointArrayMap[j]; // y, z etc
val = point[prop];
rows[key][i + j] = pick(categoryMap[prop][val], val); // Pick a Y axis category if present
j = j + 1;
}
});
i = i + j;
}
});
// Make a sortable array
for (x in rows) {
if (rows.hasOwnProperty(x)) {
rowArr.push(rows[x]);
}
}
// Sort it by X values
rowArr.sort(function (a, b) {
return a.x - b.x;
});
// Add header row
if (!xTitle) {
xTitle = xAxis.isDatetimeAxis ? 'DateTime' : 'Category';
}
dataRows = [[xTitle].concat(names)];
// Add the category column
each(rowArr, function (row) {
var category = row.name;
if (!category) {
if (xAxis.isDatetimeAxis) {
if (row.x instanceof Date) {
row.x = row.x.getTime();
}
category = Highcharts.dateFormat(dateFormat, row.x);
} else if (xAxis.categories) {
category = pick(xAxis.names[row.x], xAxis.categories[row.x], row.x)
} else {
category = row.x;
}
}
// Add the X/date/category
row.unshift(category);
dataRows.push(row);
});
return dataRows;
};
/**
* Get a CSV string
*/
Highcharts.Chart.prototype.getCSV = function (useLocalDecimalPoint) {
var csv = '',
rows = this.getDataRows(),
options = (this.options.exporting || {}).csv || {},
itemDelimiter = options.itemDelimiter || ',', // use ';' for direct import to Excel
lineDelimiter = options.lineDelimiter || '\n'; // '\n' isn't working with the js csv data extraction
// Transform the rows to CSV
each(rows, function (row, i) {
var val = '',
j = row.length,
n = useLocalDecimalPoint ? (1.1).toLocaleString()[1] : '.';
while (j--) {
val = row[j];
if (typeof val === "string") {
val = '"' + val + '"';
}
if (typeof val === 'number') {
if (n === ',') {
val = val.toString().replace(".", ",");
}
}
row[j] = val;
}
// Add the values
csv += row.join(itemDelimiter);
// Add the line delimiter
if (i < rows.length - 1) {
csv += lineDelimiter;
}
});
return csv;
};
/**
* Build a HTML table with the data
*/
Highcharts.Chart.prototype.getTable = function (useLocalDecimalPoint) {
var html = '<table>',
rows = this.getDataRows();
// Transform the rows to HTML
each(rows, function (row, i) {
var tag = i ? 'td' : 'th',
val,
j,
n = useLocalDecimalPoint ? (1.1).toLocaleString()[1] : '.';
html += '<tr>';
for (j = 0; j < row.length; j = j + 1) {
val = row[j];
// Add the cell
if (typeof val === 'number') {
val = val.toString();
if (n === ',') {
val = val.replace('.', n);
}
html += '<' + tag + ' class="number">' + val + '</' + tag + '>';
} else {
html += '<' + tag + '>' + (val === undefined ? '' : val) + '</' + tag + '>';
}
}
html += '</tr>';
});
html += '</table>';
return html;
};
function getContent(chart, href, extension, content, MIME) {
var a,
blobObject,
name,
options = (chart.options.exporting || {}).csv || {},
url = options.url || 'http://www.highcharts.com/studies/csv-export/download.php';
if (chart.options.exporting.filename) {
name = chart.options.exporting.filename;
} else if (chart.title) {
name = chart.title.textStr.replace(/ /g, '-').toLowerCase();
} else {
name = 'chart';
}
// MS specific. Check this first because of bug with Edge (#76)
if (window.Blob && window.navigator.msSaveOrOpenBlob) {
// Falls to msSaveOrOpenBlob if download attribute is not supported
blobObject = new Blob([content]);
window.navigator.msSaveOrOpenBlob(blobObject, name + '.' + extension);
// Download attribute supported
} else if (downloadAttrSupported) {
a = document.createElement('a');
a.href = href;
a.target = '_blank';
a.download = name + '.' + extension;
document.body.appendChild(a);
a.click();
a.remove();
} else {
// Fall back to server side handling
Highcharts.post(url, {
data: content,
type: MIME,
extension: extension
});
}
}
/**
* Call this on click of 'Download CSV' button
*/
Highcharts.Chart.prototype.downloadCSV = function () {
var csv = this.getCSV(true);
getContent(
this,
'data:text/csv,\uFEFF' + csv.replace(/\n/g, '%0A'),
'csv',
csv,
'text/csv'
);
};
/**
* Call this on click of 'Download XLS' button
*/
Highcharts.Chart.prototype.downloadXLS = function () {
var uri = 'data:application/vnd.ms-excel;base64,',
template = '<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">' +
'<head><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet>' +
'<x:Name>Ark1</x:Name>' +
'<x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]-->' +
'<style>td{border:none;font-family: Calibri, sans-serif;} .number{mso-number-format:"0.00";}</style>' +
'<meta name=ProgId content=Excel.Sheet>' +
'<meta charset=UTF-8>' +
'</head><body>' +
this.getTable(true) +
'</body></html>',
base64 = function (s) {
return window.btoa(unescape(encodeURIComponent(s))); // #50
};
getContent(
this,
uri + base64(template),
'xls',
template,
'application/vnd.ms-excel'
);
};
/**
* View the data in a table below the chart
*/
Highcharts.Chart.prototype.viewData = function () {
if (!this.insertedTable) {
var div = document.createElement('div');
div.className = 'highcharts-data-table';
// Insert after the chart container
this.renderTo.parentNode.insertBefore(div, this.renderTo.nextSibling);
div.innerHTML = this.getTable();
this.insertedTable = true;
}
};
// Add "Download CSV" to the exporting menu. Use download attribute if supported, else
// run a simple PHP script that returns a file. The source code for the PHP script can be viewed at
// https://raw.github.com/highslide-software/highcharts.com/master/studies/csv-export/csv.php
if (Highcharts.getOptions().exporting) {
Highcharts.getOptions().exporting.buttons.contextButton.menuItems.push({
textKey: 'downloadCSV',
onclick: function () { this.downloadCSV(); }
}, {
textKey: 'downloadXLS',
onclick: function () { this.downloadXLS(); }
}, {
textKey: 'viewData',
onclick: function () { this.viewData(); }
});
}
// Series specific
if (seriesTypes.map) {
seriesTypes.map.prototype.exportKey = 'name';
}
if (seriesTypes.mapbubble) {
seriesTypes.mapbubble.prototype.exportKey = 'name';
}
});
当我们加上exporting.js的时候下载选项菜单就出来了对吧，如图:
你们的应该是英文的，具体变成中文设置如下：
Highcharts.setOptions({
lang: {
printChart: "打印图表",
downloadJPEG: "下载JPEG 图片",
downloadPDF: "下载PDF文档",
downloadPNG: "下载PNG 图片",
downloadSVG: "下载SVG 矢量图",
exportButtonTitle: "导出图片",
downloadCSV:"下载CSV格式文件",
downloadXLS:"下载XLS格式文件"
}
});
这段代码是highcharts全区设置里放在$(document).ready({放这就行了});
这个Viewdata table很蛋疼，点击了显示没办法隐藏了。所以这里我们把它去掉，上面export_csv.js去掉红色关于viewdata的部分就行了，注释掉即可。
自定义下载按钮下载文件格式为csv:
解读它的插件js可以看到上面我标记为绿色的部分，这两行代码就是下载的执行代码。那我们直接可以调用就行了：
// 下载图表
$('.pr_li_1').click(function() {
if (index == 0) {
g_chart = $('#chart_C').highcharts(); //得到上面图表的对象
g_chart.downloadCSV();
}else if (index == 1) {
g2_chart = $('#LTV_chart').highcharts(); //得到上面图表的对象
g2_chart.downloadCSV();
}
});
这样就是点击按钮下载csv文档格式了，你也可以写成XLS格式的。
有的人是想简单的就是下载图片png或者img格式，那这个就是更改exporting.js了，具体操作很简单，查看官网的exporting就行了。
表格重绘：
有的人想要表格重新刷新或者重新绘制一下那种效果，可以用在table切换后，或者隐藏显示，刷新数据以后。这个很简单，调用一下就行了：chart1 = new Highcharts.Chart(chart);
上面那就要这么写:
chart = {
credits: {
text: null,
},
chart: {
// type: 'column',
renderTo: 'chart_C',
zoomType: 'xy',
// inverted: false
},
exporting: {
enabled: false
},......................略.