javaSVG转换ImageIcon

Java中可以使用Batik库来实现SVG转换为ImageIcon。

以下是一个示例代码：

import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import javax.swing.ImageIcon;
import org.apache.batik.anim.dom.SAXSVGDocumentFactory;
import org.apache.batik.anim.dom.SVGOMSVGElement;
import org.apache.batik.bridge.UserAgentAdapter;
import org.apache.batik.dom.svg.SVGDOMImplementation;
import org.apache.batik.gvt.renderer.StaticRenderer;
import org.apache.batik.transcoder.TranscoderException;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.image.ImageTranscoder;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;

public class SVGConverter {
    public static ImageIcon convertToImageIcon(String svg) throws SAXException, IOException, TranscoderException {
        // 将SVG字符串转换为DOM对象
        SAXSVGDocumentFactory factory = new SAXSVGDocumentFactory(SVGDOMImplementation.getDOMImplementation());
        Document document = factory.createSVGDocument(null, new ByteArrayInputStream(svg.getBytes()));

        // 获取SVG元素
        SVGOMSVGElement svgElement = (SVGOMSVGElement) document.getDocumentElement();

        // 创建静态渲染器
        StaticRenderer renderer = new StaticRenderer();
        renderer.setSVGCanvasSize(svgElement.getViewport().getViewBox().getBounds().getSize());

        // 渲染SVG
        renderer.setTree(svgElement.getGraphicsNode());
        renderer.repaint();

        // 将渲染结果转换为ImageIcon
        ImageTranscoder transcoder = new ImageTranscoder() {
            @Override
            public BufferedImage createImage(int width, int height) {
                return new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
            }

            @Override
            public void writeImage(BufferedImage image, TranscoderOutput output) throws TranscoderException {
                setResult(image);
            }
        };
        transcoder.transcode(new TranscoderInput(document), null);
        Image image = transcoder.getImage();
        return new ImageIcon(Toolkit.getDefaultToolkit().createImage(image.getSource()));
    }
}

调用方式：

String svg = "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\"><circle cx=\"50\" cy=\"50\" r=\"40\" stroke=\"green\" stroke-width=\"4\" fill=\"yellow\" /></svg>";
ImageIcon icon = SVGConverter.convertToImageIcon(svg);