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geojson输出
import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; public class GeoJsonOutput { /** * geoJson * 包括 features 和 type */ Map<String,Object> geoJson =null; /** * features * 包括 geometry、properties、type */ List<Map<String,Object>> features = null; Map<String,Object> feature = null; /** * geometry * 包括 coordinates 和 type */ Map<String,Object> geometry =null; /** * coordinates */ List<List<Double>> coordinates = null; /** * properties * 包括 color 和 lever */ Map<String,String> properties = null; /** * coordinate */ List<Double> coordinate = null; /** * 填充 coordinate */ public List<Double> fillCoordnate(double lon,double lat,double z){ coordinate = new ArrayList<>(); coordinate.add(lon); coordinate.add(lat); coordinate.add(z); return coordinate; } /** * 填充properties */ public Map<String,String> fillProperties(String color,String lever){ properties = new HashMap<String,String>(); properties.put("color",color); properties.put("lever",lever); return properties; } /** * 填充 coordinates */ public List<List<Double>> fillCoordinates(List<List<Double>> list){ coordinates = new ArrayList<List<Double>>(); for (List coordinate: list) { coordinates.add(coordinate); } return coordinates; } /** * 填充 geometry */ public Map<String,Object> fillGeometry(List<List<Double>> list){ geometry = new HashMap<>(); geometry.put("coordinates",this.fillCoordinates(list)); geometry.put("type","LineString"); return geometry; } /** * 填充 feature */ public Map<String,Object> fillFeature(List<List<Double>> coordinates,String color,String lever){ feature = new HashMap<String,Object>(); feature.put("geometry",this.fillGeometry(coordinates)); feature.put("properties",this.fillProperties(color,lever)); feature.put("type","Feature"); return feature; } /** * 填充 features */ public List<Map<String,Object>> fillFeatures(List<Map<String,Object>> feature){ features = new ArrayList<>(); for (Map map: feature) { features.add(map); } return features; } /** * 填充 geoJson */ public Map<String,Object> fillGeoJson(List<Map<String,Object>> feature){ geoJson = new HashMap<>(); geoJson.put("features",this.fillFeatures(feature)); geoJson.put("type","FeatureCollection"); return geoJson; } }
public void jsonOutPut(Map map) { ObjectMapper mapper = new ObjectMapper(); try{ mapper.writeValue(new File("D:/geoJsonTest.json"), map); }catch (Exception e){ e.printStackTrace(); } }
public class Test3 { public static void main(String[] args){ GeoJsonOutput go = new GeoJsonOutput(); /*填充 coordinates*/ List<List<Double>> coordiantes = new ArrayList<>(); coordiantes.add(go.fillCoordnate(104.63227074146543,28.769242770389777,0)); coordiantes.add(go.fillCoordnate(104.64619058834954,28.77423963850202,0)); coordiantes.add(go.fillCoordnate(104.66260886928977,28.76246130652316,0)); /*填充 features*/ List<Map<String,Object>> features = new ArrayList(); features.add(go.fillFeature(coordiantes,"#FF0000","4")); features.add(go.fillFeature(coordiantes,"#00FF00","3")); features.add(go.fillFeature(coordiantes,"#FF0000","2")); features.add(go.fillFeature(coordiantes,"#00FF00","1")); /*填充 geoJson*/ SiteGeneralImpl sg = new SiteGeneralImpl(); sg.jsonOutPut(go.fillGeoJson(features)); } }
结果:
{
"features": [
{
"geometry": {
"coordinates": [
[
104.63227074146543,
28.769242770389777,
0
],
[
104.64619058834954,
28.77423963850202,
0
],
[
104.66260886928977,
28.76246130652316,
0
]
],
"type": "LineString"
},
"type": "Feature",
"properties": {
"color": "#FF0000",
"lever": "4"
}
},
{
"geometry": {
"coordinates": [
[
104.63227074146543,
28.769242770389777,
0
],
[
104.64619058834954,
28.77423963850202,
0
],
[
104.66260886928977,
28.76246130652316,
0
]
],
"type": "LineString"
},
"type": "Feature",
"properties": {
"color": "#00FF00",
"lever": "3"
}
},
{
"geometry": {
"coordinates": [
[
104.63227074146543,
28.769242770389777,
0
],
[
104.64619058834954,
28.77423963850202,
0
],
[
104.66260886928977,
28.76246130652316,
0
]
],
"type": "LineString"
},
"type": "Feature",
"properties": {
"color": "#FF0000",
"lever": "2"
}
},
{
"geometry": {
"coordinates": [
[
104.63227074146543,
28.769242770389777,
0
],
[
104.64619058834954,
28.77423963850202,
0
],
[
104.66260886928977,
28.76246130652316,
0
]
],
"type": "LineString"
},
"type": "Feature",
"properties": {
"color": "#00FF00",
"lever": "1"
}
}
],
"type": "FeatureCollection"
}
geojson输出
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