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有人可以幫我導出Java圖形到SVG嗎？我知道如何將Java圖形導出到SVG，但需要定義一個放置符號的框，以便我可以將它用於geotools中的樣式。函數的一個問題是，我將符號放在左上角（0,0），因此只有四分之一的符號顯示在地理工具中，而在QGIS中只顯示了它的四分之一。我張貼了一些例子，我用這個JavaGraphics與蠟染
繪製函數
public void draw(Graphics g){
Graphics2D g2 = (Graphics2D) g;
float r = 5*_f;
// circle
crtajPodlogu(g2,new Ellipse2D.Float(_x-r,_y-r,2*r,2*r));
//point in middle
g2.fill(new Ellipse2D.Float(_x-r/5,_y-r/5,2*r/5,2*r/5));
g2.draw(new Ellipse2D.Float(_x-r/5,_y-r/5,2*r/5,2*r/5));
// vert. line
g2.draw(new Line2D.Float(_x,_y+r,_x,_y-5*r/2));
//hor. line
g2.draw(new Line2D.Float(_x,_y-2*r,_x+r,_y-2*r));
//arrow
g2.draw(new Line2D.Float(_x+r,_y-2*r,_x+r/2,_y-5*r/2));
g2.draw(new Line2D.Float(_x+r,_y-2*r,_x+r/2,_y-3*r/2));
}
轉換功能
// Get a DOMImplementation.
DOMImplementation domImpl =
GenericDOMImplementation.getDOMImplementation();
// Create an instance of org.w3c.dom.Document.
String svgNS = "http://www.w3.org/2000/svg";
Document document = domImpl.createDocument(svgNS, "svg", null);
SVGGraphics2D svgGenerator = new SVGGraphics2D(document);
String[] myStrings = new String[] {
"symbolForSvg",
};
List mylist = Arrays.asList(myStrings);
Iterator itr= mylist.iterator();
while(itr.hasNext()){
try {
Class clazz = Class.forName("key."+itr.next().toString());
java.lang.reflect.Method method = clazz.getMethod("draw", Graphics.class);
method.invoke(clazz.newInstance(), svgGenerator);
// Finally, stream out SVG to the standard output using
// UTF-8 encoding.
//boolean useCSS = true; // we want to use CSS style attributes
Writer out = null;
System.out.println(clazz.getSimpleName());
out = new BufferedWriter(new OutputStreamWriter(
new FileOutputStream("tkey/"+clazz.getSimpleName()+".svg"), "utf-8"));
svgGenerator.stream(out, false);
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | NoSuchMethodException
| SecurityException | IllegalArgumentException | InvocationTargetException | UnsupportedEncodingException | FileNotFoundException | SVGGraphics2DIOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
，我這個
<?xml version="1.0"?>
<!DOCTYPE svg PUBLIC '-//W3C//DTD SVG 1.0//EN'
'http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd'>
<svg xmlns:xlink="http://www.w3.org/1999/xlink" style="fill-opacity:1; color-rendering:auto; color-interpolation:auto; text-rendering:auto; stroke:black; stroke-linecap:square; stroke-miterlimit:10; shape-rendering:auto; stroke-opacity:1; fill:black; stroke-dasharray:none; font-weight:normal; stroke-width:1; font-family:'Dialog'; font-style:normal; stroke-linejoin:miter; font-size:12px; stroke-dashoffset:0; image-rendering:auto;" xmlns="http://www.w3.org/2000/svg"
><!--Generated by the Batik Graphics2D SVG Generator--><defs id="genericDefs"
/><g
><g
><circle r="5" style="fill:none;" cx="0" cy="0"
/><circle r="1" style="stroke:none;" cx="0" cy="0"
/><circle r="1" style="fill:none;" cx="0" cy="0"
/><line y2="-12.5" style="fill:none;" x1="0" x2="0" y1="5"
/><line y2="-10" style="fill:none;" x1="0" x2="5" y1="-10"
/><line y2="-12.5" style="fill:none;" x1="5" x2="2.5" y1="-10"
/><line y2="-7.5" style="fill:none;" x1="5" x2="2.5" y1="-10"
/></g
></g
></svg>