使用geotoolsy读取shp文件计算任意两点间的最短路径，使用java编写main示例

好的，以下是一个示例代码，演示如何使用Geotools读取shp文件，并计算任意两点间的最短路径：

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.geotools.data.DataStore;
import org.geotools.data.DataStoreFinder;
import org.geotools.data.DefaultTransaction;
import org.geotools.data.Transaction;
import org.geotools.data.simple.SimpleFeatureIterator;
import org.geotools.data.simple.SimpleFeatureSource;
import org.geotools.factory.CommonFactoryFinder;
import org.geotools.feature.FeatureIterator;
import org.geotools.feature.simple.SimpleFeatureBuilder;
import org.geotools.feature.simple.SimpleFeatureTypeBuilder;
import org.geotools.geometry.jts.JTSFactoryFinder;
import org.geotools.graph.build.GraphBuilder;
import org.geotools.graph.build.line.BasicLineGraphGenerator;
import org.geotools.graph.path.DijkstraShortestPathFinder;
import org.geotools.graph.structure.Edge;
import org.geotools.graph.structure.Graph;
import org.geotools.graph.structure.Node;
import org.geotools.graph.structure.basic.BasicEdge;
import org.geotools.graph.structure.basic.BasicNode;
import org.geotools.referencing.CRS;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.filter.FilterFactory2;
import org.opengis.geometry.Geometry;
import org.opengis.geometry.primitive.Point;
import org.opengis.referencing.crs.CoordinateReferenceSystem;

import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.Envelope;
import com.vividsolutions.jts.geom.GeometryFactory;

public class ShpFileShortestPath {

    public static void main(String[] args) throws Exception {
        // 读取shp文件
        File file = new File("path/to/shapefile.shp");
        DataStore dataStore = DataStoreFinder.getDataStore(file);
        String typeName = dataStore.getTypeNames()[0];
        SimpleFeatureSource featureSource = dataStore.getFeatureSource(typeName);

        // 创建图形数据
        GraphBuilder graphBuilder = new GraphBuilder(JTSFactoryFinder.getGeometryFactory());
        SimpleFeatureIterator featureIterator = featureSource.getFeatures().features();
        try {
            while (featureIterator.hasNext()) {
                SimpleFeature feature = featureIterator.next();
                Geometry geometry = (Geometry) feature.getDefaultGeometry();

                // 添加节点
                Coordinate[] coordinates = geometry.getCoordinates();
                for (Coordinate coordinate : coordinates) {
                    Node node = new BasicNode();
                    node.setObject(coordinate);
                    graphBuilder.addNode(node);
                }

                // 添加边
                for (int i = 0; i < coordinates.length - 1; i++) {
                    Coordinate start = coordinates[i];
                    Coordinate end = coordinates[i + 1];
                    double weight = start.distance(end);
                    Edge edge = new BasicEdge(graphBuilder.getNode(start), graphBuilder.getNode(end));
                    edge.setObject(weight);
                    graphBuilder.addEdge(edge);
                }
            }
        } finally {
            featureIterator.close();
        }

        Graph graph = graphBuilder.getGraph();

        // 计算最短路径
        DijkstraShortestPathFinder finder = new DijkstraShortestPathFinder(graph);
        Node startNode = graph.getNode(new Coordinate(起点经度, 起点纬度));
        Node endNode = graph.getNode(new Coordinate(终点经度, 终点纬度));
        List<Node> path = finder.getPath(startNode, endNode);

        // 输出最短路径
        System.out.println("最短路径：");
        for (Node node : path) {
            Coordinate coordinate = (Coordinate) node.getObject();
            System.out.println(coordinate.x + "," + coordinate.y);
        }
    }
}

其中，需要根据实际情况替换以下代码：

- ``path/to/shapefile.shp``：shp文件的路径。
- ``起点经度``、``起点纬度``、``终点经度``、``终点纬度``：起点和终点的经纬度坐标。

请注意，这只是一个简单的示例，实际应用中需要根据具体情况进行适当调整。