JSP页面导出PDF格式文件

JSP页面导出PDF格式文件基本在前端页面可以全部完成

<script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/0.4.1/html2canvas.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.0.272/jspdf.debug.js"></script>

添加下载链接的点击事件

<script type="text/javascript">
 ???var downPdf = document.getElementById("downLoad");
 ???downPdf.onclick = function() {
 ???????downPdf.parentNode.removeChild(downPdf);
 ???????html2canvas(document.body, {
 ???????????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 = 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 = 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‘, 0, 0, imgWidth, imgHeight );
 ???????????????} else {
 ???????????????????while(leftHeight > 0) {
 ???????????????????????pdf.addImage(pageData, ‘JPEG‘, 0, position, imgWidth, imgHeight)
 ???????????????????????leftHeight -= pageHeight;
 ???????????????????????position -= 841.89;
 ???????????????????????//避免添加空白页
 ???????????????????????if(leftHeight > 0) {
 ???????????????????????????pdf.addPage();
 ???????????????????????}
 ???????????????????}
 ???????????????}
 ???????????????pdf.save(‘content.pdf‘);
 ???????????}
 ???????})
 ???}
</script>

<a id="downLoad" href="javascript:void(0)">打印档案</a>
最终生成文件

JSP页面导出PDF格式文件

原文地址：https://www.cnblogs.com/xiao1993/p/10259159.html