JAVA polygon实现离线经纬度逆地址解析省份城市信息【免费】

package com.iammybest.regeo.provider; import com.fasterxml.jackson.databind.ObjectMapper; import com.iammybest.regeo.build.Bound; import com.iammybest.regeo.build.Feature; import com.iammybest.regeo.build.MapAreaInfo; import java.awt.*; import java.io.*; import java.util.*; import java.util.List; /** * @author qinghai.deng * @className BoundProvider * @description TODO * @create 2021/8/27 22:54 **/ public class BoundProvider { //城市adcode对应 围栏列表 private static Map<String, List<Polygon>> cityCodePolygonMap = new HashMap<>(); //城市adcode对应城市信息 private static Map<String, MapAreaInfo> cityCodePropertyMap = new HashMap<>(); private static ObjectMapper objectMapper = new ObjectMapper(); //线程安全 懒汉模式创建单示例 private BoundProvider(){ init("map"); } private static class BoundProviderHolder { public final static BoundProvider instance = new BoundProvider(); } public static BoundProvider getInstance() { return BoundProviderHolder.instance; } private void init(String mapFilePath) { File mapFolder = new File(mapFilePath);//读取文件夹 File[] mapFiles = mapFolder.listFiles();//获取地图文件列表 if(null!=mapFiles&&mapFiles.length>0){//解析每个城市地图文件 for (File file:mapFiles){ FileReader fileReader = null; try { fileReader = new FileReader(file); } catch (FileNotFoundException e) { e.printStackTrace(); } BufferedReader bufferedReader = new BufferedReader(fileReader); Bound bound= null; String line=null; try { line = bufferedReader.readLine(); bound = objectMapper.readValue(line, Bound.class); bufferedReader.close(); } catch (IOException e) { continue; } for (Feature feature:bound.getFeatures()){ cityCodePropertyMap.put(feature.getProperties().getAdcode(),feature.getProperties()); // System.out.println(feature.getProperties().getName()+feature.getProperties().getAdcode()); List<Polygon> firstPolygon = new ArrayList<>(); for (List<List<List<Float>>> first:feature.getGeometry().getCoordinates()){ for (List<List<Float>> second:first){ Polygon polygon = new Polygon(); for (List<Float> node:second){ polygon.addPoint((int)(node.get(0)*1000),(int)(node.get(1)*1000)); } firstPolygon.add(polygon); } // coordinatesPolygons.add(firstPolygon); } cityCodePolygonMap.put(feature.getProperties().getAdcode(),firstPolygon); // cityCodePolygonMap.put(feature.getProperties().getAdcode(),coordinatesPolygons); } } } System.out.println("共解析城市 "+ cityCodePolygonMap.size() +" 个"); } public MapAreaInfo getCity(double lon, double lat){ Set<Map.Entry<String, List<Polygon>>> entries = cityCodePolygonMap.entrySet(); for (Map.Entry<String, List<Polygon>> entry:entries){ for (Polygon polygon:entry.getValue()){ if(polygon.contains((int)(lon*1000),(int)(lat*1000))){ return cityCodePropertyMap.get(entry.getKey()); }else{ // System.out.println("不在城市code:"+entry.getKey()); } } } return null; } }