初始化

pom.xml

@@ -250,7 +250,7 @@
     </dependency>
     <dependency>
       <groupId>org.geotools</groupId>
-      <artifactId>gt-swing</artifactId>
+      <artifactId>gt-epsg-hsql</artifactId>
       <version>${geotools.version}</version>
     </dependency>
     <dependency>

src/main/java/com/gis3c/spatial/common/CRSUtilities.java

@@ -2,13 +2,20 @@ package com.gis3c.spatial.common;/**
  * Created by hukekuan on 17-7-10.
  */
 
+import com.vividsolutions.jts.geom.Geometry;
+import org.geotools.data.DefaultTransaction;
+import org.geotools.data.Transaction;
 import org.geotools.factory.CommonFactoryFinder;
+import org.geotools.geometry.jts.JTS;
 import org.geotools.referencing.CRS;
 import org.geotools.referencing.crs.DefaultGeographicCRS;
 import org.opengis.filter.FilterFactory2;
 import org.opengis.referencing.FactoryException;
 import org.opengis.referencing.NoSuchAuthorityCodeException;
 import org.opengis.referencing.crs.CoordinateReferenceSystem;
+import org.opengis.referencing.operation.MathTransform;
+
+import java.io.IOException;
 
 /**
  * @author hukekuan
@@ -24,8 +31,45 @@ public class CRSUtilities {
         if(sridNumber == null || "".equals(sridNumber)){
             return DefaultGeographicCRS.WGS84;
         }
-        crs = CRS.decode("EPSG:" + sridNumber);
+        crs = CRS.decode("epsg:" + sridNumber);
 
         return crs;
     }
+
+    /**
+     * 生成坐标系转变对象
+     * @param rawSridNumber, 如 "4326"
+     * @param goalSridNumber, 如 "4326"
+     * @return
+     * @throws FactoryException
+     */
+    public static MathTransform MathTransform(String rawSridNumber, String goalSridNumber)
+            throws FactoryException{
+        CoordinateReferenceSystem rawCRS = null;
+        CoordinateReferenceSystem goalCRS = null;
+        if(rawSridNumber == null || "".equals(rawSridNumber)
+                || goalSridNumber == null || "".equals(goalSridNumber)){
+            throw new IllegalArgumentException("参数输入有误");
+        }
+        rawCRS = GetCRSFromSRID(rawSridNumber);
+        goalCRS = GetCRSFromSRID(goalSridNumber);
+
+        return CRS.findMathTransform(rawCRS, goalCRS, true);
+    }
+
+    public static Geometry CRSTransform(Geometry geometry, MathTransform transform)
+            throws IOException {
+        Geometry resultGeometry = null;
+        Transaction transaction = new DefaultTransaction("Project");
+        try {
+            resultGeometry = JTS.transform(geometry, transform);
+            transaction.commit();
+        } catch (Exception e) {
+            e.printStackTrace();
+            transaction.rollback();
+        }finally{
+            transaction.close();
+        }
+        return resultGeometry;
+    }
 }

src/main/java/com/gis3c/spatial/common/FeatureUtilities.java

@@ -120,7 +120,7 @@ public class FeatureUtilities {
             fjson.writeFeatureCollection(simpleFeatureCollection, writer);
             result = writer.toString();
         }else {
-            result="{'type': 'FeatureCollection', 'features': []}";
+            result="{\"type\": \"FeatureCollection\", \"features\": []}";
         }
 
         return result;

src/main/java/com/gis3c/spatial/common/GeometryUtilities.java

@@ -4,12 +4,17 @@ import com.vividsolutions.jts.geom.*;
 import com.vividsolutions.jts.io.ParseException;
 import com.vividsolutions.jts.io.WKTReader;
 import com.vividsolutions.jts.io.WKTWriter;
+import org.geotools.geometry.jts.JTS;
 import org.geotools.geometry.jts.JTSFactoryFinder;
 import net.sf.json.JSONArray;
 import net.sf.json.JSONObject;
 import org.geotools.geometry.jts.ReferencedEnvelope;
 import org.geotools.referencing.crs.DefaultGeographicCRS;
+import org.opengis.referencing.FactoryException;
+import org.opengis.referencing.operation.MathTransform;
+import org.opengis.referencing.operation.TransformException;
 
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -34,12 +39,12 @@ public class GeometryUtilities {
 
     /**
      * 根据经纬度生成Point
-     * @param x
+     * @param lon 经度
-     * @param y
+     * @param lat 维度
      * @return
      */
-    public static Point CreatePoint(double x,double y){
+    public static Point CreatePoint(double lon, double lat){
-        return geomFactory.createPoint(new Coordinate(x,y));
+        return geomFactory.createPoint(new Coordinate(lat, lon));
     }
 
     /**
@@ -312,4 +317,54 @@ public class GeometryUtilities {
         GeometryCollection gc = GeometryCollection(geometryList);
         return gc.getEnvelope();
     }
+
+    /**
+     * 生成Buffer
+     * @param geometry
+     * @param distance
+     * @return
+     */
+    public Polygon CreateBuffer(Geometry geometry,Double distance){
+        Polygon bufferResult = null;
+        if(geometry == null || distance == null){
+            throw new IllegalArgumentException("参数输入有误");
+        }
+        bufferResult = (Polygon) geometry.buffer(distance, 100);
+
+        return bufferResult;
+    }
+
+    public Polygon CreateBufferByPoint(Double lon,Double lat,Double distance){
+        Point point = CreatePoint(lon,lat);
+        return CreateBuffer(point,distance);
+    }
+
+    /**
+     * 计算两个点之间的距离
+     * @param startPoint
+     * @param endPoint
+     * @return
+     * @throws FactoryException
+     * @throws IOException
+     */
+    public static Double PointDistance(Point startPoint,Point endPoint)
+            throws TransformException, FactoryException {
+        int sridValue;
+        if(startPoint == null || endPoint == null){
+            throw new IllegalArgumentException("参数输入有误");
+        }
+        sridValue = startPoint.getSRID();
+        if(sridValue != endPoint.getSRID()){
+            throw new IllegalArgumentException("坐标系不一致");
+        }
+        if(sridValue == 0){
+            sridValue = 4326;
+        }
+
+        return JTS.orthodromicDistance(
+                startPoint.getCoordinate(),
+                endPoint.getCoordinate(),
+                CRSUtilities.GetCRSFromSRID(String.valueOf(sridValue))
+        );
+    }
 }

src/main/java/com/gis3c/spatial/entity/BaseFeature.java

@@ -102,9 +102,6 @@ public class BaseFeature {
         return featureBuilder.buildFeature(featureIndex, objList.toArray());
     }
 
-
-
-
 /***************************************************************************************************/
 
     /**

src/test/java/com/gis3c/spatial/App.java

@@ -7,11 +7,16 @@ import com.gis3c.ol.service.LayerService;
 import com.gis3c.ol.service.MapService;
 import com.gis3c.ol.service.SourceService;
 import com.gis3c.spatial.common.FeatureUtilities;
+import com.gis3c.spatial.common.GeometryUtilities;
 import com.gis3c.spatial.entity.Region;
 import com.gis3c.spatial.entity.RegionType;
 import com.gis3c.spatial.service.RegionService;
 import com.gis3c.spatial.service.TestService;
+import com.vividsolutions.jts.geom.Coordinate;
+import com.vividsolutions.jts.geom.Point;
 import org.opengis.feature.simple.SimpleFeature;
+import org.opengis.referencing.FactoryException;
+import org.opengis.referencing.operation.TransformException;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.support.ClassPathXmlApplicationContext;
 
@@ -20,6 +25,7 @@ import java.util.*;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
+
 /**
  * Created by hukekuan on 2017/12/14.
  */
@@ -30,34 +36,14 @@ public class App {
     public static void main(String[] args) throws IllegalAccessException, IOException {
         ApplicationContext context = ApplicationInit();
 
-//        SourceService sourceService = context.getBean(SourceService.class);
-//        LayerService layerService = context.getBean(LayerService.class);
-//        MapService mapService = context.getBean(MapService.class);
-//        TestService testService = context.getBean(TestService.class);
-        RegionService regionService = context.getBean(RegionService.class);
-
-
-        System.out.println(3 & 2);
-
-//        System.out.println(a.compareTo(b));
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
 
+        Point start = GeometryUtilities.CreatePoint(118.024444,36.802778);
+        Point end = GeometryUtilities.CreatePoint(118.027777,36.759166);
+        try {
+            System.out.println(GeometryUtilities.PointDistance(start,end));
+        } catch (TransformException | FactoryException e) {
+            e.printStackTrace();
+        }
 
 
 //        List<Region> regionList = regionService.findRegionsByParentCode("370000");