import com.vividsolutions.jts.awt.ShapeWriter; //导入依赖的package包/类
public void addObstacles(Geometry ... geom) {
	if (this.mapFilename == null) throw new Error("Please set a map file first!");
	BufferedImage img = null;
	try {
		img = ImageIO.read(new File(mapFilename)); 
		System.out.println("IMGTYPE: " + img.getType());
		Graphics2D g2 = img.createGraphics();
		ShapeWriter writer = new ShapeWriter();
		g2.setPaint(Color.black);
		for (Geometry g : geom) {
			AffineTransformation at = new AffineTransformation();
			at.scale(1.0/mapResolution, -1.0/mapResolution);
			at.translate(0, img.getHeight());
			Geometry scaledGeom = at.transform(g);
			Shape shape = writer.toShape(scaledGeom);
			System.out.println("Shape: " + shape.getBounds2D());
			g2.fill(shape);
		}
		File outputfile = new File(TEMP_MAP_DIR + File.separator + "tempMap" + (numObstacles++) + ".png");
		ImageIO.write(img, "png", outputfile);
		this.mapFilename = outputfile.getAbsolutePath();
	}
	catch (IOException e) { e.printStackTrace(); }		
}
 

import com.vividsolutions.jts.awt.ShapeWriter; //导入依赖的package包/类
public static ShapeWriter getConverter(Viewport viewport)
{
  ShapeWriter sw = new ShapeWriter(viewport, new PointShapeFactory.Point());
  //sw.setRemoveDuplicatePoints(true);
  //sw.setDecimation(viewport.toModel(DECIMATION_DISTANCE));
  return sw;
}
 

import com.vividsolutions.jts.awt.ShapeWriter; //导入依赖的package包/类
private static void paint(Geometry geometry, ShapeWriter converter, Graphics2D g,
     BasicStyle style) 
 {
   if (geometry == null)
		return;

   if (geometry instanceof GeometryCollection) {
     GeometryCollection gc = (GeometryCollection) geometry;
     /**
      * Render each element separately.
      * Otherwise it is not possible to render both filled and non-filled
      * (1D) elements correctly
      */
     for (int i = 0; i < gc.getNumGeometries(); i++) {
       paint(gc.getGeometryN(i), converter, g, style);
     }
     return;
   }

	Shape shape = converter.toShape(geometry);
   
	Color lineColor = style.getLineColor();
	Paint fillColor = style.getFillColor();
   // handle points in a special way for appearance and speed
	if (geometry instanceof Point) {
		g.setStroke(POINT_STROKE);
	  g.setPaint(lineColor);
     g.draw(shape);
     g.fill(shape);
		return;
	}

	Stroke stroke = style.getStroke();
   if (stroke == null)
	  g.setStroke(GEOMETRY_STROKE);
	else
	  g.setStroke(stroke);
	
   // Test for a polygonal shape and fill it if required
	if (geometry instanceof Polygon && fillColor != null) {
		g.setPaint(fillColor);
		g.fill(shape);
	}
	
	if (lineColor != null) {
	  g.setColor(lineColor);
	  try {
	    g.draw(shape);
	    
	  } 
	  catch (Throwable ex) {
	    System.out.println(ex);
	    // eat it!
	  }
	}
}