导出为PDF系列（三）__HTML导PDF
用HTML导出PDF主要使用html2canvas+jsPdf。
（1）引入上面两个js
jsPdf.debug.js
html2canvas.js
（2）给想导出的区域设定一个id
（3）将userInfoForExport渲染成canvas，下面是具体的代码
<html>
<head>
<title>登陆成功</title>
<script src="../../static/js/jsPdf.debug.js"></script>
<script src="../../static/js/html2canvas.js"></script>
<style type="text/css">
.export-table,.export-table tr td {
border: 1px solid #333;
}
.export-table tr td {
padding: 5px;
height: 30px;
}
.export-table {
width: 800px;
height: 100%;
border-collapse: collapse;
font-family: -webkit-pictograph;
font-size: 1.5em;
}
.export-table-title {
width: 160px;
padding: 5px;
font-weight: bold;
}
</style>
</head>
<body>login successful
<span class="export" id="exportFile"><i></i>export</span>
<button type="button" onclick="exportUserInfoNew()">export</button>
<div id="userInfoForExport" style="background: #fff;display: none">
<table class="export-table">
<tr>
<td colspan="2" style="font-weight: bold;height: 45px;font-size: 1.3em;">information</td>
</tr>
<tr>
<td class="export-table-title">pic:</td>
<td >
<img style="width: 80px;height: 80px;" src="../../static/pic/gril.jpg"/>
</td>
</tr>
<tr>
<td class="export-table-title">pin</td>
<td>xxx123456</td>
</tr>
<tr>
<td class="export-table-title">name</td>
<td>hana</td>
</tr>
<tr>
<td class="export-table-title">country</td>
<td>china</td>
</tr>
<tr>
<td class="export-table-title">email</td>
<td>[email protected]</td>
</tr>
<tr>
<td class="export-table-title">phonenum</td>
<td>110110</td>
</tr>
</table>
</div>
<script>
function exportUserInfoNew() {
//将downPDF这个对象渲染成canvas
document.getElementById("userInfoForExport").style.display="block";
html2canvas(document.getElementById("userInfoForExport"), {
useCORS:true,//解决导出图片跨域不显示问题
onrendered:function(canvas) {
var contentWidth = canvas.width;
var contentHeight = canvas.height;
//一页pdf显示html页面生成的canvas高度;
var pageHeight = contentWidth / 592.28 * 841.89;
//未生成pdf的html页面高度
var leftHeight = contentHeight;
//pdf页面偏移
var position = 80;
//a4纸的尺寸[595.28,841.89]，html页面生成的canvas在pdf中图片的宽高
var imgWidth = 595.28;
var imgHeight = 592.28/contentWidth * contentHeight;
var pageData = canvas.toDataURL('image/jpeg', 1.0);
var pdf = new jsPDF('', 'pt', 'a4');
//有两个高度需要区分，一个是html页面的实际高度，和生成pdf的页面高度(841.89)
//当内容未超过pdf一页显示的范围，无需分页
if (leftHeight < pageHeight) {
pdf.addImage(pageData, 'JPEG', 100, 80, imgWidth, imgHeight );
} else {
while(leftHeight > 0) {
pdf.addImage(pageData, 'JPEG', 100, position, imgWidth, imgHeight)
leftHeight -= pageHeight;
position -= 841.89;
//避免添加空白页
if(leftHeight > 0) {
pdf.addPage();
}
}
}
pdf.save('Personal_Information.pdf')
}
});
document.getElementById("userInfoForExport").style.display="none";
};
</script>
</body>
</html>（4）效果如下