导出pdf

document.getElementById("exportSiteInfoTemp").onclick = function() {
	var thisMinheight=$("#viewSiteInfoTempContent")[0].clientHeight+10000;
	$("#viewSiteInfoTempModalEx").html($("#viewSiteInfoTempContent").html()).css({"display":"block","height":(thisMinheight)+"px"});	//
	 html2canvas($('#viewSiteInfoTempContent'), {
		 background:"#ffffff",
		  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;
		      // 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');
		  }
		})

	 $("#viewSiteInfoTempModalEx").html("").css("display","none");
	 //附;https://www.jianshu.com/p/570c84ee2e8d
}

　　

<script type="text/javascript" src="$!{request.getContextPath()}/res/webFrameset/plugins/intoPdf/js/jspdf.debug.js"></script>
	<script type="text/javascript" src="$!{request.getContextPath()}/res/webFrameset/plugins/intoPdf/js/html2canvas.js"></script>