使用jspdf将HTML表导出为pdf

Question

我需要使用jspdf将HTML表导出为pdf文件。我尝试了以下代码，但它在pdf文件中显示空白/空输出。任何建议或示例代码都会有所帮助。 `

<script type="text/javascript">
    function demo1() {
        $(function () {
            var specialElementHandlers = {
                '#editor': function (element,renderer) {
                    return true;
                }
            };
         $('#cmd').click(function () {
                var doc = new jsPDF();
                doc.fromHTML($('#htmlTableId').html(), 15, 15, {
                    'width': 170,'elementHandlers': specialElementHandlers
                });
                doc.save('sample-file.pdf');
            });  
        }); 
    }
</script>
`

Answer 1

这是工作示例：

在头上

<script type="text/javascript" src="jspdf.debug.js"></script>

脚本：

<script type="text/javascript">
        function demoFromHTML() {
            var pdf = new jsPDF('p', 'pt', 'letter');
            // source can be HTML-formatted string, or a reference
            // to an actual DOM element from which the text will be scraped.
            source = $('#customers')[0];

            // we support special element handlers. Register them with jQuery-style 
            // ID selector for either ID or node name. ("#iAmID", "div", "span" etc.)
            // There is no support for any other type of selectors 
            // (class, of compound) at this time.
            specialElementHandlers = {
                // element with id of "bypass" - jQuery style selector
                '#bypassme': function(element, renderer) {
                    // true = "handled elsewhere, bypass text extraction"
                    return true
                }
            };
            margins = {
                top: 80,
                bottom: 60,
                left: 40,
                width: 522
            };
            // all coords and widths are in jsPDF instance's declared units
            // 'inches' in this case
            pdf.fromHTML(
                    source, // HTML string or DOM elem ref.
                    margins.left, // x coord
                    margins.top, {// y coord
                        'width': margins.width, // max width of content on PDF
                        'elementHandlers': specialElementHandlers
                    },
            function(dispose) {
                // dispose: object with X, Y of the last line add to the PDF 
                //          this allow the insertion of new lines after html
                pdf.save('Test.pdf');
            }
            , margins);
        }
    </script>

和表：

<div id="customers">
        <table id="tab_customers" class="table table-striped" >
            <colgroup>
                <col width="20%">
                <col width="20%">
                <col width="20%">
                <col width="20%">
            </colgroup>
            <thead>         
                <tr class='warning'>
                    <th>Country</th>
                    <th>Population</th>
                    <th>Date</th>
                    <th>Age</th>
                </tr>
            </thead>
            <tbody>
                <tr>
                    <td>Chinna</td>
                    <td>1,363,480,000</td>
                    <td>March 24, 2014</td>
                    <td>19.1</td>
                </tr>
                <tr>
                    <td>India</td>
                    <td>1,241,900,000</td>
                    <td>March 24, 2014</td>
                    <td>17.4</td>
                </tr>
                <tr>
                    <td>United States</td>
                    <td>317,746,000</td>
                    <td>March 24, 2014</td>
                    <td>4.44</td>
                </tr>
                <tr>
                    <td>Indonesia</td>
                    <td>249,866,000</td>
                    <td>July 1, 2013</td>
                    <td>3.49</td>
                </tr>
                <tr>
                    <td>Brazil</td>
                    <td>201,032,714</td>
                    <td>July 1, 2013</td>
                    <td>2.81</td>
                </tr>
            </tbody>
        </table> 
    </div>

和按钮运行：

<button onclick="javascript:demoFromHTML()">PDF</button>

和在线工作示例：

tabel to pdf jspdf

或试试这个：HTML Table Export

Answer 2

您也可以使用jsPDF-AutoTable插件。您可以查看使用以下代码的演示here。

var doc = new jsPDF('p', 'pt');
var elem = document.getElementById("basic-table");
var res = doc.autoTableHtmlToJson(elem);
doc.autoTable(res.columns, res.data);
doc.save("table.pdf");

Answer 3

使用get(0)而不是html()。换句话说，替换

doc.fromHTML($('#htmlTableId').html(), 15, 15, {
    'width': 170,'elementHandlers': specialElementHandlers
});

同

doc.fromHTML($('#htmlTableId').get(0), 15, 15, {
    'width': 170,'elementHandlers': specialElementHandlers
});

Answer 4

我们可以将需要转换的部分用PDF分开

例如，如果table在类“pdf-table-wrap”中

在此之后，我们需要调用html2canvas函数并结合jsPDF

以下是示例代码

    var pdf = new jsPDF('p', 'pt', [580, 630]);
    html2canvas($(".pdf-table-wrap")[0], {
        onrendered: function(canvas) {
            document.body.appendChild(canvas);
            var ctx = canvas.getContext('2d');
            var imgData = canvas.toDataURL("image/png", 1.0);
            var width = canvas.width;
            var height = canvas.clientHeight;
            pdf.addImage(imgData, 'PNG', 20, 20, (width - 10), (height));

        }
    });
    setTimeout(function() {
        //jsPDF code to save file
        pdf.save('sample.pdf');
    }, 0);

这里给出完整的教程http://freakyjolly.com/create-multipage-html-pdf-jspdf-html2canvas/