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

<!--jts库通常用于几何计算和表示地理空间数据-->
<dependency><groupId>org.locationtech.jts</groupId><artifactId>jts-core</artifactId><version>1.18.0</version>
</dependency>

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<String> 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<String> 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 necessaryif (!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<String> pointsList) {Coordinate[] coordinates = new Coordinate[pointsList.size()];for (int i = 0; i < pointsList.size(); i++) {coordinates[i] = parseCoordinate(pointsList.get(i));}return coordinates;}/*** 将经纬度数据字符串转换为坐标** @param pointStr 经纬度数据字符串，格式为 "经度,纬度"* @return 坐标*/private static Coordinate parseCoordinate(String pointStr) {String[] parts = pointStr.split(StringPool.COMMA);double lon = Double.parseDouble(parts[0]);double lat = Double.parseDouble(parts[1]);return new Coordinate(lon, lat);}}

单元测试类

public class GeoFenceUtilTest {/*** Test geo** @since 2.0.0*/@Testpublic void testGeo() {// 示例电子围栏点集合List<String> 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

在这里插入图片描述

<!doctype html>
<html>
<head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width"><style>html,body,#container {width: 100%;height: 100%;}</style><title>多边形的绘制和编辑</title><link rel="stylesheet" href="https://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css" /><script src="https://webapi.amap.com/maps?v=2.0&key=您申请的key值&plugin=AMap.PolygonEditor"></script><script src="https://a.amap.com/jsapi_demos/static/demo-center/js/demoutils.js"></script>
</head>
<body>
<div id="container"></div>
<div class="input-card" style="width: 120px"><button class="btn" onclick="polyEditor.open()" style="margin-bottom: 5px">开始编辑</button> <button class="btn" onclick="polyEditor.close()">结束编辑</button> 
</div>
<script type="text/javascript">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！');});</script>
</body>
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