Java实现电子围栏的小例子

主要需求是实现一个电子围栏判断的小例子其中包括前端和后端的demo代码

引入对应的依赖库

    org.locationtech.jts
    jts-core
    1.18.0

public class GeoFenceUtils {
    /** geometryFactory */
    private static final GeometryFactory geometryFactory = new GeometryFactory();
    /**
     * 判断指定的GPS点是否在电子围栏内
     *
     * @param fencePointsList 包含电子围栏的经纬度数据的列表，格式为 "经度,纬度"
     * @param pointStr        指定的GPS点，格式为 "经度,纬度"
     * @return 如果在电子围栏内则返回true，否则返回false
     */
    public static boolean isPointInGeoFence(List fencePointsList, String pointStr) {
        // 将电子围栏的经纬度数据转换为坐标数组
        Coordinate[] fencePoints = parseCoordinates(fencePointsList);
        // 将指定的GPS点转换为坐标
        Coordinate targetPoint = parseCoordinate(pointStr);
        // 创建电子围栏多边形
        Polygon geoFencePolygon = createPolygon(fencePoints);
        // 创建指定的GPS点
        Point point = geometryFactory.createPoint(targetPoint);
        // 检查指定的GPS点是否在电子围栏内
        return geoFencePolygon.contains(point);
    }
    /**
     * 判断指定的GPS点是否在电子围栏内
     *
     * @param geoFencePolygon geo fence polygon
     * @param pointStr        指定的GPS点，格式为 "经度,纬度"
     * @return 如果在电子围栏内则返回true ，否则返回false
     * @since 2.0.0
     */
    public static boolean isPointInGeoFence(Polygon geoFencePolygon, String pointStr) {
        // 将指定的GPS点转换为坐标
        Coordinate testPoint = parseCoordinate(pointStr);
        // 创建指定的GPS点
        Point point = geometryFactory.createPoint(testPoint);
        // 检查指定的GPS点是否在电子围栏内
        return geoFencePolygon.contains(point);
    }
    /**
     * 判断指定的GPS点是否在电子围栏内
     *
     * @param fencePointsList 包含电子围栏的经纬度数据的列表，格式为 "经度,纬度"
     * @return 如果在电子围栏内则返回true，否则返回false
     */
    public static Polygon getPointInGeoFence(List fencePointsList) {
        // 将电子围栏的经纬度数据转换为坐标数组
        Coordinate[] fencePoints = parseCoordinates(fencePointsList);
        // 创建电子围栏
        return createPolygon(fencePoints);
    }
    /**
     * 根据GPS点集合创建多边形
     *
     * @param coordinates GPS点集合
     * @return 多边形对象
     */
    private static Polygon createPolygon(Coordinate[] coordinates) {
        // Ensure the polygon is closed by adding the first coordinate at the end if necessary
        if (!coordinates[0].equals(coordinates[coordinates.length - 1])) {
            Coordinate[] closedCoordinates = new Coordinate[coordinates.length + 1];
            System.arraycopy(coordinates, 0, closedCoordinates, 0, coordinates.length);
            closedCoordinates[closedCoordinates.length - 1] = coordinates[0];
            coordinates = closedCoordinates;
        }
        return geometryFactory.createPolygon(coordinates);
    }
    /**
     * 将包含经纬度数据的列表转换为坐标数组
     *
     * @param pointsList 包含经纬度数据的列表
     * @return 坐标数组
     */
    private static Coordinate[] parseCoordinates(List pointsList) {
        Coordinate[] coordinates = new Coordinate[pointsList.size()];
        for (int i = 0; i  
单元测试类
 
public class GeoFenceUtilTest {
    /**
     * Test geo
     *
     * @since 2.0.0
     */
    @Test
    public void testGeo() {
        // 示例电子围栏点集合
        List fencePointsList = List.of(
                "116.403322,39.920255",
                "116.429043,39.913906",
                "116.438447,39.882655",
                "116.419252,39.873514",
                "116.406656,39.881143",
                "116.389347,39.884167",
                "116.389846,39.891365",
                "116.377436,39.908228",
                "116.410512,39.901984"
        );
        // 指定的GPS点
        String testPointStr = "116.384112,39.899172";
        // 检查指定的GPS点是否在电子围栏内
        boolean isWithinFence = GeoFenceUtils.isPointInGeoFence(fencePointsList, testPointStr);
        System.out.println("指定的GPS点是否在电子围栏内: " + isWithinFence);
    }
}
 
前端的测试demo，高德开放平台JS API测试平台，找到多边形编辑器，将下面的代码粘贴到执行器里面，然后点击右上角的执行代码，就可以获取到对应范围的点位地址
 
 


    
    
    
    
    html,
    body,
    #container {
      width: 100%;
      height: 100%;
    }
    
    多边形的绘制和编辑
    
    
    




   开始编辑 
   结束编辑 


    var map = new AMap.Map("container", {
      center: [116.400274, 39.905812],
      zoom: 14,
      viewMode: '3D',
    });
    var path = [
      [116.403322, 39.920255],
      [116.410703, 39.897555],
      [116.402292, 39.892353],
      [116.389846, 39.891365]
    ]
    var path1 = [
      [116.453322, 39.920255],
      [116.460703, 39.897555],
      [116.452292, 39.892353],
      [116.439846, 39.891365]
    ]
    var polygon = new AMap.Polygon({
      path: path,
      strokeColor: "#FF33FF",
      strokeWeight: 6,
      strokeOpacity: 0.2,
      fillOpacity: 0.4,
      fillColor: '#1791fc',
      zIndex: 50,
      bubble: true,
    })
    var polygon1 = new AMap.Polygon({
      path: path1,
      strokeColor: "green",
      strokeWeight: 6,
      strokeOpacity: 0.2,
      fillOpacity: 0.4,
      fillColor: '#1791fc',
      zIndex: 50,
      bubble: true,
    })
    map.add([polygon, polygon1])
    // 缩放地图到合适的视野级别
    map.setFitView()
    var polyEditor;
      // var polyEditor = new AMap.PolyEditor(map, polygon)
      // polyEditor = new AMap.PolygonEditor(map)
    polyEditor = new AMap.PolygonEditor(map, polygon);
    polyEditor.addAdsorbPolygons(polygon1)
    polyEditor.open();
   polyEditor.on("addnode", (event) => {
        let path = event.target.getPath();
       console.log('addnode');
  console.log(path);
     
      });
 
      polyEditor.on("adjust", (event) => {
        let path = event.target.getPath();
             console.log('adjust');
  console.log(path);
      });
      polyEditor.on("removenode", (event) => {
        let path = event.target.getPath();
          console.log('removenode');
  console.log(path);
      });
      polyEditor.on("end", (event) => {
        let path = event.target.getPath();
            console.log('end');
  console.log(path);
      });
     map.on('click',(e)=>{
       console.log('您在 [ '+e.lnglat.getLng()+','+e.lnglat.getLat()+']的位置点击了多边形！');
    });