在Apache Batik中将JPEG图像转换为SVG

Question

我是Apache的新手，我想使用代码转换https://xmlgraphics.apache.org/batik/using/transcoder.html将JPEG图像转换成SVG图像。

这是我的代码：

public void saveAsSvg() throws Exception {

        SVGTranscoder t = new SVGTranscoder();

        t.addTranscodingHint(SVGTranscoder.KEY_FORMAT, true);

        String svgURI = new File(inputFilePath).toURL().toString();

        InputStream inputStream = new FileInputStream(inputFilePath);
        Reader inputStreamReader = new InputStreamReader(inputStream);
        TranscoderInput input = new TranscoderInput(inputStreamReader);

        OutputStream ostream = new FileOutputStream(outputFilePath);
        Writer outputStreamWriter = new OutputStreamWriter(ostream);
        TranscoderOutput output = new TranscoderOutput(outputStreamWriter);

        t.transcode(input, output);

        ostream.flush();
        ostream.close();
        System.exit(0);
    }

我的pom.xml是根据Convert a SVG image to a JPEG image using Apache Batik说的

<dependency>
    <groupId>org.apache.xmlgraphics</groupId>
    <artifactId>batik-transcoder</artifactId>
    <version>1.7</version>
</dependency>

<dependency>
    <groupId>org.apache.xmlgraphics</groupId>
    <artifactId>batik-codec</artifactId>
    <version>1.7</version>
</dependency>

<dependency>
    <groupId>org.apache.xmlgraphics</groupId>
    <artifactId>xmlgraphics-commons</artifactId>
    <version>2.1</version>
</dependency>

我得到的例外情况如下：

org.apache.batik.transcoder.TranscoderException: element
    at org.apache.batik.transcoder.svg2svg.PrettyPrinter.fatalError(PrettyPrinter.java:1750) ~[batik-transcoder-1.7.jar:1.7+r608262]
    at org.apache.batik.transcoder.svg2svg.PrettyPrinter.print(PrettyPrinter.java:253) ~[batik-transcoder-1.7.jar:1.7+r608262]
    at org.apache.batik.transcoder.svg2svg.SVGTranscoder.prettyPrint(SVGTranscoder.java:230) ~[batik-transcoder-1.7.jar:1.7+r608262]
    at org.apache.batik.transcoder.svg2svg.SVGTranscoder.transcode(SVGTranscoder.java:186) ~[batik-transcoder-1.7.jar:1.7+r608262]
    at com.example.SaveAsJpeg.saveAsSvg(SaveAsJpeg.java:80) ~[classes/:na]

.

从我得到的例外中学不到任何东西。请帮帮忙。

Answer 1

//Step 1
ImageIcon imageIcon = new ImageIcon(imagePath);
Image imageTmp = imageIcon.getImage();
//Step 2
BufferedImage bufferedImage = new BufferedImage(imageIcon.getIconWidth(), 
imageIcon.getIconHeight(),
BufferedImage.TYPE_INT_ARGB);

bufferedImage.getGraphics().drawImage(imageTmp, 0, 0, null);
//step 3
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(bufferedImage, "png", baos);
byte[] bytes = baos.toByteArray();
String imageEncode = "data:image/png;base64," + Base64.getEncoder().encodeToString(bytes);
baos.close();
bufferedImage.flush();

//step 4
Element image = document.createElementNS(SVGDOMImplementation.SVG_NAMESPACE_URI, "image");
//set X,Y,Width,Height ...
image.setAttributeNS("http://www.w3.org/1999/xlink", "xlink:href", imageEncode);

您可以使用编码base64将图像转换为svg图像元素。

1. 将图像读取到ImageIcon对象
2. 从BuffredImage创建ImageIcon
3. 将BuffredImage转换为编码Base64。
4. 将图像编码放入标记中