Java geotools,添加到MapContent时发生DefaultFeatureCollection错误
我正在使用geotools,但我的测试类不起作用。我只想在Mapcontent上显示一个行字符串,但当我添加DefaultFeatureCollection时,只会出现错误 这是我的简单代码Java geotools,添加到MapContent时发生DefaultFeatureCollection错误,java,geotools,Java,Geotools,我正在使用geotools,但我的测试类不起作用。我只想在Mapcontent上显示一个行字符串,但当我添加DefaultFeatureCollection时,只会出现错误 这是我的简单代码 public class Test2 extends JFrame { Test2() throws ParseException { super(); Dimension d = new Dimension(400, 400); setMinimumSize(d); Ma
public class Test2 extends JFrame {
Test2() throws ParseException {
super();
Dimension d = new Dimension(400, 400);
setMinimumSize(d);
MapContent map = new MapContent();
JMapPane mapPane = new JMapPane(map);
add(mapPane);
setDefaultCloseOperation(EXIT_ON_CLOSE);
pack();
setVisible(true);
WKTReader wktReader = new WKTReader();
SimpleFeatureTypeBuilder sfTypeBuilder = new SimpleFeatureTypeBuilder();
sfTypeBuilder.setName("testType");
sfTypeBuilder.setCRS(null);
sfTypeBuilder.add("pointProperty", LineString.class);
SimpleFeatureType featureType = sfTypeBuilder.buildFeatureType();
SimpleFeatureBuilder sfBuilder = new SimpleFeatureBuilder(featureType);
sfBuilder.add(wktReader.read("LINESTRING (20 10, 20 30, 50 30)"));
SimpleFeature feature = sfBuilder.buildFeature("id1");
DefaultFeatureCollection testColletion = new DefaultFeatureCollection(
null, null);
testColletion.add(feature);
System.out.println(testColletion.isEmpty());
StyleBuilder sb = new StyleBuilder();
org.geotools.styling.Style style = sb.createStyle();
Mark mark = sb.createMark(StyleBuilder.MARK_CIRCLE, Color.RED,
Color.BLACK, 1);
PointSymbolizer pointSymb = sb.createPointSymbolizer(sb.createGraphic(
null, mark, null, 1, 15, 0));
FeatureTypeStyle fts = sb
.createFeatureTypeStyle((Symbolizer) pointSymb);
style.featureTypeStyles().add(fts);
org.geotools.styling.Font font = sb
.createFont("Arial", false, true, 12);
TextSymbolizer ts = sb.createTextSymbolizer(Color.BLACK, font, "name");
fts.rules().get(0).symbolizers().add(ts);
// FeatureLayer der Karte hinzufügen
Layer layer1 = new FeatureLayer(testColletion, style);
// Error when i add the Layer to the Map and run the Main //Method)
map.addLayer(layer1);
System.out.println(map.layers());
}
public static void main(String[] args) {
try {
Test2 t = new Test2();
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
错误-
在FeatureType中找不到“name”(http://www.opengis.net/gml:testType),可用的属性是:[pointProperty]
实际上是非常自我解释的。在样式中使用的属性不在要素中。因此,要么在点上添加名称,要么注释掉添加文本符号的行:
// TextSymbolizer ts = sb.createTextSymbolizer(Color.BLACK, font, "name");
// fts.rules().get(0).symbolizers().add(ts);
一切都会很好。我无法在地图上显示任何内容。。。。我不知道如何处理另一个集合,如SimpleFeatureCollection,因为它是一个接口。。。也许我需要一个SimpleFeatureCollection来将我的Linestring添加到地图中……您会遇到什么样的错误?当您显示错误时,您可能会得到更多/更好的答案,而不是一开始就期望每个人都运行您的代码。