JAVA实现html代码转为图片

方法一：html2Image

1、引入依赖

<dependency>
    <groupId>gui.ava</groupId>
    <artifactId>html2image</artifactId>
    <version>2.0.1</version>
</dependency>

2、代码实现

@Component
public class HtmlUtil {

    /**
     * 文件工具
     */
    @Autowired
    private FileUtil fileUtil;


    public String htmlToImageConverter(String html, Integer height, Integer width, String fileName) {
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        HtmlParserImpl htmlParser = new HtmlParserImpl();
        htmlParser.loadHtml(html);
        ImageRendererImpl imageRenderer = new ImageRendererImpl(htmlParser);
        //设置宽高，未设置自动适应
        if(height != null){
            imageRenderer.setHeight(height);
        }
        if(width != null){
            imageRenderer.setWidth(width);
        }
        BufferedImage bufferedImage = imageRenderer.getBufferedImage();
        //默认png格式，jpg格式会出现渲染问题，需要重写ImageRendererImpl
        // 这里是因为他这边写死图片的压缩算法为BufferedImage.BITMASK，修改成BufferedImage.TYPE_INT_RGB即可
        try {
            ImageIO.write(bufferedImage, "png", outputStream);
            ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(outputStream.toByteArray());
            // 将图像保存为PNG格式的文件
            FileItem fileItem = CommUtil.createFileItem(byteArrayInputStream, fileName + ".png");
            //上传到文件服务并获取文件ID
            fileId = fileUtil.getFileId(fileItem);
            outputStream.close();
            byteArrayInputStream.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        return fileId;
    }
}

存在问题

1、渲染的html界面和实际界面存在出入，例如设置

<dependency>
    <groupId>org.seleniumhq.selenium</groupId>
    <artifactId>selenium-java</artifactId>
    <version>3.141.59</version>
    <exclusions>
        <exclusion>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
        </exclusion>
        <exclusion>
            <artifactId>httpclient</artifactId>
            <groupId>org.apache.httpcomponents</groupId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>com.codeborne</groupId>
    <artifactId>phantomjsdriver</artifactId>
    <version>1.4.4</version>
</dependency>
<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>25.0-jre</version>
</dependency>