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JAVA 使用HTML2IMAGE将HTML转图片

需要的jar 第二个jar是工具类是用于日期转换的第一个才是Html2Image所需要的包

<dependency>
    <groupId>gui.ava</groupId>
    <artifactId>html2image</artifactId>
    <version>0.9</version>
</dependency>
 
 
<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-all</artifactId>
    <version>5.0.6</version>
</dependency>

转换代码

HtmlImageGenerator imageGenerator = new HtmlImageGenerator();
  
  
  
  
            String htmlstr = "<table style=\"width: 700px;font-size:16px;font-family: 'Microsoft YaHei';\" cellpadding=\"0\" cellspacing=\"0\">\n" +
                    "    <tr >\n" +
                    "      <th  style=\"background-color: #f2f2f2;height: 30px;width:  700px; border:1px solid #e6e6e6;border-top:none;text-align: center;color: #333333;\" colspan=\"2\">收据</th>\n" +
                    "    </tr>\n" +
                    "    <tr style=\"width:  700px;\">\n" +
                    "      <td style=\"border:1px solid #e6e6e6;border-top:none;text-align: center;color: #666666;height: 30px;\" >日期</td>\n" +
                    "      <td  style=\"border:1px solid #e6e6e6;border-top:none;text-align: center;color: #666666;border-left: 0px;height: 30px;\">"+DateUtil.format(saleOrder.getCreateTime(), "yyyy-MM-dd HH:mm:ss")+"</td>\n" +
                    "    </tr>\n" +
                    "    <tr style=\"width:  700px;\">\n" +
                    "      <td  style=\"border:1px solid #e6e6e6;border-top:none;text-align: center;color: #666666;height: 30px;\">交易编号</td>\n" +
                    "      <td  style=\"border:1px solid #e6e6e6;border-top:none;text-align: center;color: #666666;border-left: 0px;height: 30px;\">"+saleOrder.getOrderCode()+"</td>\n" +
                    "    </tr>\n" +
                    "    <tr style=\"width:  700px;\">\n" +
                    "      <td  style=\"border:1px solid #e6e6e6;border-top:none;text-align: center;color: #666666;height: 30px;\">交易类型</td>\n" +
                    "      <td  style=\"border:1px solid #e6e6e6;border-top:none;text-align: center;color: #666666;border-left: 0px;height: 30px;\">捐赠</td>\n" +
                    "    </tr>\n" +
                    "    <tr style=\"width:  700px;\">\n" +
                    "      <td  style=\"border:1px solid #e6e6e6;border-top:none;text-align: center;color: #666666;height: 30px;\">交易金额</td>\n" +
                    "      <td  style=\"border:1px solid #e6e6e6;border-top:none;text-align: center;color: #666666;border-left: 0px;height: 30px;\">"+saleOrder.getProductPrice()+"</td>\n" +
                    "    </tr>\n" +
                    "   <tr style=\"width:  700px;\">\n" +
                    "      <td  style=\"border:1px solid #e6e6e6;border-top:none;text-align: center;color: #666666;height: 30px;\">付款人</td>\n" +
                    "      <td  style=\"border:1px solid #e6e6e6;border-top:none;text-align: center;color: #666666;border-left: 0px;height: 30px;\">"+saleOrder.getUserName()+"</td>\n" +
                    "    </tr>" +
                    "</table>";
            imageGenerator.loadHtml(htmlstr);
            BufferedImage bufferedImage = getGrayPicture(imageGenerator.getBufferedImage());
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
            try {
                ImageIO.write(bufferedImage, "jpg", outputStream);
                String base64Img = Base64.encodeBase64String(outputStream.toByteArray());
                String res = "data:image/jpg;base64," + base64Img.toString();
                modelAndView.addObject("imageres", res);
  
            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                if(outputStream != null){
                    try {
                        outputStream.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }

这个是用于重新设置画布背景颜色的

public BufferedImage getGrayPicture(BufferedImage originalImage)
    {
        BufferedImage grayPicture;
        int imageWidth = originalImage.getWidth();
        int imageHeight = originalImage.getHeight();
  
        grayPicture = new BufferedImage(imageWidth, imageHeight,
                BufferedImage.TYPE_INT_RGB);
        ColorConvertOp cco = new ColorConvertOp(ColorSpace
                .getInstance(ColorSpace.CS_GRAY), null);
        cco.filter(originalImage, grayPicture);
        return grayPicture;
    }

前端:

1	`<img id="ringoImage"` `src="${imageres!''}"` `style="height: 100%">`

效果:

loadUrl(url)  (从url载入html)
loadHtml(html) (载入本地html)
saveAsImage(file) (以图片形式保存html)
saveAsHtmlWithMap(file, imageUrl) (创建一个HTML文件包含客户端image-map)
getLinks()(列出所有在HTML文档的链接和相应href、目标、头衔、位置和尺寸)
getBufferedImage() (获得awt,html缓冲后的图片)
getLinksMapMarkup(mapName) (HTML代码段里获得的客户端image-map <地图>产生的链接)
get/setOrientation(orientation) (get/set文本定位)
get/setSize(dimension)  (设置生成图片大小)

参考文章

https://blog.csdn.net/luohaobubu/article/details/7414554?utm_source=blogxgwz5

https://blog.csdn.net/fykhlp/article/details/6204714

原文地址：https://www.freesion.com/article/6136419823/