需要用到的插件:
<script src="js/html2canvas.min.js" type="text/javascript" charset="utf-8"></script>
<script src="js/jspdf.min.js" type="text/javascript" charset="utf-8"></script>
<script src="js/echarts3.js" type="text/javascript" charset="utf-8"></script>
html2canvas:將頁面的dom元素轉爲圖片的形式
jspdf:頁面端的生成pdf工具,可以跳過後臺進行下載。
echart:圖表生成插件
頁面代碼:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
</head>
<body>
<div id="main" style="height:400px"></div>
<button onclick="convertCanvasToImage()">download pdf</button>
</body>
<script src="js/html2canvas.min.js" type="text/javascript" charset="utf-8"></script>
<script src="js/jspdf.min.js" type="text/javascript" charset="utf-8"></script>
<script src="js/echarts3.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
var myChart = echarts.init(document.getElementById('main'));
var option = {
backgroundColor: 'white',
title: {
text: 'ECharts 入門示例'
},
tooltip: {},
legend: {
data: ['銷量']
},
xAxis: {
data: ["襯衫", "羊毛衫", "雪紡衫", "褲子", "高跟鞋", "襪子"]
},
yAxis: {},
series: [{
name: '銷量',
type: 'bar',
data: [5, 20, 36, 10, 10, 20]
}]
};
myChart.setOption(option);
</script>
<script type="text/javascript">
function convertCanvasToImage() {
html2canvas(document.getElementById('main'), {
onrendered: function(canvas) {
document.body.appendChild(canvas);
createPDFObject(canvas.toDataURL("image/jpeg"));
}
});
}
function createPDFObject(imgData) {
var doc = new jsPDF('p', 'pt');
doc.addImage(imgData, 5, 5, 600, 300, 'img');
doc.save('test.pdf')
}
</script>
</html>
注:
①Echarts的option裏面一定要設置背景顏色,否則的話,jspdf插件會默認將黑色作爲背景色。
②因爲只需要添加圖表到pdf,所以設置字體的一些代碼按需添加。