springboot html转图片

引入pom

<dependency>
	<groupId>gui.ava</groupId>
	<artifactId>html2image</artifactId>
	<version>0.9</version>
</dependency>

完整示例

public static void main(String[] args) {
    
    
	HtmlImageGenerator imageGenerator = new HtmlImageGenerator();
 
	String htmlstr = "<span>test</span>";
 
	/*html代码元素会有限制，项input标签元素不能用，img没测试，应该可以*/
	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();
		System.out.println(res);
	} catch (IOException e) {
    
    
		e.printStackTrace();
	}finally {
    
    
		if(outputStream != null){
    
    
			try {
    
    
				outputStream.close();
			} catch (IOException e) {
    
    
				e.printStackTrace();
			}
		}
	}
}
 
 
public static 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;
}