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

 

来源：oschina

链接：https://my.oschina.net/u/4414570/blog/4300916