jQuery jsPdf 导出pdf

1、头部引入js

<script src="/static/js/main/jquery-3.3.1.min.js"></script>
<script src="/static/js/dist/html2canvas.min.js"></script>
<script src="/static/js/dist/jsPdf.debug.js"></script>

2、代码实现

function exportPdf() {html2canvas(document.getElementById("exportContent"), {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 / 595.28 * 841.89;//未生成pdf的html页面高度var leftHeight = contentHeight;//pdf页面偏移var position = 0;//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 = 555.28;var imgHeight = 555.28/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', 20, 0, imgWidth, imgHeight );} else {while(leftHeight > 0) {pdf.addImage(pageData, 'JPEG', 20, position, imgWidth, imgHeight)leftHeight -= pageHeight;position -= 841.89;//避免添加空白页if(leftHeight > 0) {pdf.addPage();}}}pdf.save('xxxx.pdf');}})
}