网上好多思路啊,大部分都是将html转pdf,这种方法我试了很多,都不能很好地支持jsp,稍微复杂一点根本不起作用,也不知他们的博客都怎么写的,还真是应了那句话天下博客一大抄,自己都不验证的
下面说下我的实现,参考了网上两篇博客,后面不小心把网页关了找不到地址了,对原作者真是抱歉
<a id="downLoad" href="javascript:void(0)">点击下载pdf</a> <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>
<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>
注意,微信内置浏览器不能下载