前端导出HTML（含图片）到word文档中实践总结

叁歲伎倆 2022-12-03 11:29 836阅读 0赞

一、业务需求：

需要将查看页面中的HTML内容及对应的鱼骨图（sbg）导出到word文档中；

二、解决方案：

1、需要svg通过后端请求转成png，重新写入到div中，供导出使用；

2、使用**jQuery-Word-Export插件，**将重构后的div内容导出到word中。

三、前端实现代码：

1、HTML页面中引入jquery.min.js、FileSaver.js、jquery.wordexport.js三个文件；

2、页面添加导出div，将导出内容写入（含转换后的png）；

3、添加导出按钮，导出按钮添加click事件：

$("\#download").wordExport("分析与评价");

四、遇到的问题：

1、svg转png：前端插件很多不兼容IE浏览器，改成后端实现（Svg.dll【从官网上拉的源码修改后编译再引入项目中使用】）；

2、图片导出到word，很多后端插件不兼容office word 2003，改用前端实现；

3、jquery.wordexport.js的导出方法wordExport（）中var img = markup.find('img');不支持谷歌 浏览器，需改成var img = new Image();改后，导出的图片在WPS中不显示。

再次修改插件源码（生成canvas部分代码）如下：

if (typeof jQuery !== "undefined" && typeof saveAs !== "undefined") {
        (function ($) {
            $.fn.wordExport = function (fileName) {
                fileName = typeof fileName !== 'undefined' ? fileName : "jQuery-Word-Export";
                var static = {
                    mhtml: {
                        top: "Mime-Version: 1.0\nContent-Base: " + location.href + "\nContent-Type: Multipart/related; boundary=\"NEXT.ITEM-BOUNDARY\";type=\"text/html\"\n\n--NEXT.ITEM-BOUNDARY\nContent-Type: text/html; charset=\"utf-8\"\nContent-Location: " + location.href + "\n\n<!DOCTYPE html>\n<html>\n_html_</html>",
                        head: "<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">\n<style>\n_styles_\n</style>\n</head>\n",
                        body: "<body>_body_</body>"
                    }
                };
                var options = {
                    maxWidth: 624,//最大宽度
                    defaultLength: 300 //默认高度
                };
                // Clone selected element before manipulating it
                var markup = $(this).clone();
    
                // Remove hidden elements from the output
                markup.each(function () {
                    var self = $(this);
                    if (self.is(':hidden'))
                        self.remove();
                });
    
                // Embed all images using Data URLs
                var images = Array();
                var img = markup.find('img');
                var mhtmlBottom = "\n";
                //var img = new Image();
                for (var i = 0; i < img.length; i++) {
                    // Calculate dimensions of output image
                    var w = Math.min(img[i].width == 0 ? options.maxWidth : img[i].width, options.maxWidth);
                    var h = (img[i].height == 0 ? options.defaultLength : img[i].height) * (w / (img[i].width == 0 ? options.maxWidth : img[i].width));
    
                    // Create canvas for converting image to data URL
                    var canvas = document.createElement("CANVAS");
                    canvas.width = w;
                    canvas.height = h;
                    // Draw image to canvas
                    var context = canvas.getContext('2d');
                    context.drawImage(img[i], 0, 0, w, h);
                    // Get data URL encoding of image
                    var uri = canvas.toDataURL("image/png");
                    console.log(i+":"+uri);
                    $(img[i]).attr("src", img[i].src);
                    img[i].width = w;
                    img[i].height = h;
    
                    mhtmlBottom += "--NEXT.ITEM-BOUNDARY\n";
                    mhtmlBottom += "Content-Location: " + uri + "\n";
                    mhtmlBottom += "Content-Type: " + uri.substring(uri.indexOf(":") + 1, uri.indexOf(";")) + "\n";
                    mhtmlBottom += "Content-Transfer-Encoding: " + uri.substring(uri.indexOf(";") + 1, uri.indexOf(",")) + "\n\n";
                    mhtmlBottom += uri.substring(uri.indexOf(",") + 1) + "\n\n";
                }
    
                mhtmlBottom += "--NEXT.ITEM-BOUNDARY--";
    
                //TODO: load css from included stylesheet
                var styles = "";
    
                // Aggregate parts of the file together
                var fileContent = static.mhtml.top.replace("_html_", static.mhtml.head.replace("_styles_", styles) + static.mhtml.body.replace("_body_", markup.html())) + mhtmlBottom;
    
                // Create a Blob with the file contents
                var blob = new Blob([fileContent], {
                    type: "application/msword;charset=utf-8"
                });
                saveAs(blob, fileName + ".doc");
                
            };
        })(jQuery);
    } else {
        if (typeof jQuery === "undefined") {
            console.error("jQuery Word Export: missing dependency (jQuery)");
        }
        if (typeof saveAs === "undefined") {
            console.error("jQuery Word Export: missing dependency (FileSaver.js)");
        }
    }

五、参照网址：

[http://hoohtml.com/jQuery/Tools/2016090927.html][http_hoohtml.com_jQuery_Tools_2016090927.html]

[https://www.cnblogs.com/liudaihuablogs/p/9726700.html][https_www.cnblogs.com_liudaihuablogs_p_9726700.html]

[https://blog.csdn.net/weixin\_33743880/article/details/92385994][https_blog.csdn.net_weixin_33743880_article_details_92385994]

[https://www.llxrandom.com/test/jqueryword][https_www.llxrandom.com_test_jqueryword]

[http_hoohtml.com_jQuery_Tools_2016090927.html]: http://hoohtml.com/jQuery/Tools/2016090927.html
[https_www.cnblogs.com_liudaihuablogs_p_9726700.html]: https://www.cnblogs.com/liudaihuablogs/p/9726700.html
[https_blog.csdn.net_weixin_33743880_article_details_92385994]: https://blog.csdn.net/weixin_33743880/article/details/92385994
[https_www.llxrandom.com_test_jqueryword]: https://www.llxrandom.com/test/jqueryword