html页面指定部分导出为pdf,滚动条以外也正常显示
首先需要两个相关联JS文件
jspdf.debug.js和html2canvas.js具体内容太多了,上传的不完整,就不上传了。可访问下面两个http查看 jspdf.debug.js网站:https://cdn.bootcss.com/jspdf/1.3.4/jspdf.debug.js html2canvas.js网站: https://cdn.bootcss.com/html2canvas/0.5.0-beta4/html2canvas.js 内容复制出来存放在自己的实际目录即可
导出部分的JS参考
function exportReportTemplet4() {
var GD120A_N2 = T2; //产品编号
console.log("GD120A_N2=" + GD120A_N2);
var element = $('#lc-content116');//需要导出为PDF的div标签ID
var w = element.width(); // 获得该容器的宽
var h = element.height(); // 获得该容器的高
var offsetTop = element.offset().top; // 获得该容器到文档顶部的距离
var offsetLeft = element.offset().left; // 获得该容器到文档最左的距离
var canvas = document.createElement("canvas");
var abs = 0;
var win_i = $(window).width(); // 获得当前可视窗口的宽度(不包含滚动条)
var win_o = window.innerWidth; // 获得当前窗口的宽度(包含滚动条)
if (win_o > win_i) {
abs = (win_o - win_i) / 2; // 获得滚动条长度的一半
}
canvas.width = w * 2; // 将画布宽&&高放大两倍
canvas.height = h * 2;
var context = canvas.getContext("2d");
var scale = 1;
context.scale(2, 2);
context.translate(-offsetLeft - abs, -offsetTop);
html2canvas(element, {
allowTaint: true,
taintTest: true,
canvas: canvas,
dpi: 172,//导出pdf清晰度
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 // 分页
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(GD120A_N2 + "结果报表.pdf");
}
});
}
exportReportTemplet4();
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