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:

            <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/

 

posted @ 2022-06-17 09:06  一万年以前  阅读(39)  评论(0编辑  收藏  举报