我需要将 JPanel(图形)中的内容(形状)转换为 SVGGraphics2D 对象,以获取使用 Apache Batik 库生成的 svg 文件。public void paintComponent(Graphics g) { Graphics2D g2 = (Graphics2D) g; g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2.setPaint(fg); // draw Text g2.drawString("Hello world!", 250, 400); // draw Line2D.Double g2.setPaint(orange); g2.draw(new Line2D.Double(50, 50, 200, 200)); // draw Point2D.Double g2.setPaint(red); g2.fill(new Ellipse2D.Double(400, 400, 5, 5)); // draw Rectangle2D.Double g2.setPaint(magenta); g2.draw(new Rectangle2D.Double(600, 600, 300, 150)); g2.setPaint(magenta); g2.draw(new Rectangle2D.Double(300, 300, 300, 150)); // draw Ellipse2D.Double g2.setPaint(blue); g2.draw(new Ellipse2D.Double(400, 400, 200, 200)); // draw GeneralPath (polygon) g2.setPaint(green); int x1Points[] = {200, 500, 300}; int y1Points[] = {100, 100, 300}; GeneralPath polygon = new GeneralPath(GeneralPath.WIND_EVEN_ODD, x1Points.length); polygon.moveTo(x1Points[0], y1Points[0]); for ( int index = 1; index < x1Points.length; index++ ) { polygon.lineTo(x1Points[index], y1Points[index]); } polygon.closePath(); g2.draw(polygon);}public void onlyWrite(){ JFrame f = new JFrame("Shapes Example2"); f.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) {System.exit(0);} }); // Get a DOMImplementation. DOMImplementation domImpl = GenericDOMImplementation.getDOMImplementation();铸造 SVGGraphics2D 我得到以下异常:线程“main”中的异常 java.lang.ClassCastException: sun.java2d.SunGraphics2D 无法在 ShapesExample2.onlyWrite(ShapesExample2.java:122) at ShapesExample2.main(ShapesExample2.java: 144)我怎样才能得到 svg 文件?谢谢!
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qq_笑_17
TA贡献1818条经验 获得超7个赞
反过来试试,SVGGraphics2D
是 的子类Graphics2D
,Graphics2D
不是 的子类SVGGraphics2D
。
因此,只需将 SVG 图形对象传递给组件的 paint 方法即可。
pane.paintComponent(svgGenerator);
您可以在此处查看更多示例:Apache Batik SVG 生成器
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