Geotools ne m'affiche pas la carte
bonjour :cry::cry:
j'ai un probleme:roll: qui m'intrigue .voila j'ai executer ce bout de programme qui sert normalement à afficher une carte à l'aide de geotools (à partir d'un fichier shp ) or ce n'estpas le cas il m'affichetout ( la fentre, les boutton....) sauf la carte qui n'apparait pas . je ne sais plus ou se situe le probleme:oops:
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| /*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package geo;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.URL;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import org.geotools.data.FeatureSource;
import org.geotools.data.Query;
import org.geotools.data.shapefile.ShapefileDataStore;
import org.geotools.map.DefaultMapContext;
import org.geotools.map.DefaultMapLayer;
import org.geotools.map.MapContext;
import org.geotools.map.MapLayer;
import org.geotools.renderer.lite.StreamingRenderer;
import org.geotools.styling.LineSymbolizer;
import org.geotools.styling.PolygonSymbolizer;
import org.geotools.styling.Style;
import org.geotools.styling.StyleBuilder;
import org.geotools.swing.JMapPane;
public class Chap1Contact {
private JMapPane mappane = new JMapPane();
public Chap1Contact() {
JFrame frm = new JFrame();
frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frm.setSize(800, 600);
frm.setTitle("Ma Première carte avec GeoTools");
JPanel pfond = new JPanel(new BorderLayout());
frm.setContentPane(pfond);
frm.setJMenuBar(buildMenu());
frm.getContentPane().add(BorderLayout.CENTER, buildMap());
frm.getContentPane().add(BorderLayout.NORTH, buildTool());
frm.setVisible(true);
}
private JMenuBar buildMenu() {
JMenuBar menu = new JMenuBar();
JMenu mfichier = new JMenu("Fichier");
JMenuItem iquitter = new JMenuItem("Quitter");
iquitter.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
mfichier.add(iquitter);
menu.add(mfichier);
return menu;
}
private JPanel buildMap() {
mappane.setBackground(new Color(157, 201, 255));
try {
MapContext mapcontext = new DefaultMapContext();
mapcontext.setTitle("Projet");
mappane.setMapContext(mapcontext);
MapLayer maplayer;
URL shapeURL = Chap1Contact.class.getResource("world_borders.shx");
ShapefileDataStore store = new ShapefileDataStore(shapeURL);
String name = store.getTypeNames()[0];
FeatureSource source = store.getFeatureSource(name);
StyleBuilder sb = new StyleBuilder();
PolygonSymbolizer ps = sb.createPolygonSymbolizer(new Color(253, 241, 187), new Color(163, 151, 97), 1);
Style solstyle = sb.createStyle();
solstyle.addFeatureTypeStyle(sb.createFeatureTypeStyle(ps));
maplayer = new DefaultMapLayer(source, solstyle);
maplayer.setTitle("world_borders.shx");
maplayer.setVisible(true);
maplayer.setQuery(Query.ALL);
mapcontext.addLayer(maplayer);
shapeURL = Chap1Contact.class.getResource("D:\\reseau_route.shp");
store = new ShapefileDataStore(shapeURL);
name = store.getTypeNames()[0];
source = store.getFeatureSource(name);
sb = new StyleBuilder();
LineSymbolizer ls2 = sb.createLineSymbolizer(Color.RED, 1);
Style roadsStyle = sb.createStyle();
roadsStyle.addFeatureTypeStyle(sb.createFeatureTypeStyle(ls2));
maplayer = new DefaultMapLayer(source, roadsStyle);
maplayer.setTitle("reseau_route.shp");
maplayer.setVisible(true);
maplayer.setQuery(Query.ALL);
mapcontext.addLayer(maplayer);
StreamingRenderer render = new StreamingRenderer();
mappane.setRenderer(render);
mappane.setDisplayArea(mapcontext.getLayerBounds());
} catch (Exception e) {
e.printStackTrace();
}
return mappane;
}
private JPanel buildTool() {
JPanel outil = new JPanel(new FlowLayout(FlowLayout.LEFT));
JButton plus = new JButton("+");
plus.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//mappane.setState(JMapPane.ZoomIn);
}
});
outil.add(plus);
JButton moins = new JButton("-");
moins.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//mappane.setState(JMapPane.ZoomOut);
}
});
outil.add(moins);
JButton pan = new JButton("Pan");
pan.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//mappane.setState(JMapPane.Pan);
}
});
outil.add(pan);
return outil;
}
public static void main(String[] args){
new Chap1Contact();
}
} |
EXEPTION rencontré
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|
run:
java.lang.NullPointerException
at org.geotools.map.MapContent.listenToMapLayers(MapContent.java:274)
at org.geotools.map.MapContent.addMapLayerListListener(MapContent.java:224)
at org.geotools.map.MapContext.addMapLayerListListener(MapContext.java:513)
at org.geotools.swing.JMapPane.doSetMapContext(JMapPane.java:479)
at org.geotools.swing.JMapPane.setMapContext(JMapPane.java:461)
at geo.Chap1Contact.buildMap(Chap1Contact.java:88)
at geo.Chap1Contact.<init>(Chap1Contact.java:55)
at geo.Chap1Contact.main(Chap1Contact.java:172) |
