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  • 将html中的内容生成PDF并且下载

    <head>
        @*需要引用的js库*@
    
        <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>
    
    </head>
    <body>
        <div id="pdfDom" class="right-aside">
            1232132131sd
        </div>
        <input type="button" value="点击" onclick="makeMpdf('建设工程施工安全监督抽查记录', 'pdfDom')" />
        <script type="text/javascript">//将html页面导出.pdf格式文件(适用于jQuery、vue库)  -- xzz 2018/04/24
            function makeMpdf(pdfName,elementId) {
                if (confirm("您确认下载该PDF文件吗?")) {
                    //var target = document.getElementsByClassName("right-aside")[0];
                    var target = document.getElementById(elementId);
                    target.style.background = "#FFFFFF";
                    if (pdfName == '' || pdfName == undefined) pdfName = "content";
    
                    html2canvas(target, {
                        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(pdfName + ".pdf");
                        }
                    })
                }
            }
    
        </script>
    </body>
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  • 原文地址:https://www.cnblogs.com/bluealine/p/12801837.html
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