Java コードを通じて Amap API を呼び出してパス距離計算を実装する方法

import com.alibaba.fastjson.JSONObject;
import com.google.common.collect.Lists;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class PathDistanceCalculator {
    private static final String AMAP_API_KEY = "your_amap_key";

    public static double calculateDistance(double startLng, double startLat, double endLng, double endLat) {
        String apiUrl = "https://restapi.amap.com/v3/distance";
        String url = String.format("%s?key=%s&origins=%f,%f&destination=%f,%f", apiUrl, AMAP_API_KEY, startLng, startLat, endLng, endLat);

        try (CloseableHttpClient httpClient = HttpClientBuilder.create().build()) {
            HttpGet request = new HttpGet(url);
            HttpResponse response = httpClient.execute(request);
            String resultJson = EntityUtils.toString(response.getEntity());

            JSONObject jsonObject = JSONObject.parseObject(resultJson);
            List<Map<String, Object>> results = jsonObject.getJSONArray("results").toJavaList(HashMap.class);
            Map<String, Object> distanceInfo = results.get(0);
            return Double.parseDouble(distanceInfo.get("distance").toString());
        } catch (IOException e) {
            e.printStackTrace();
            return -1;
        }
    }

    public static void main(String[] args) {
        double startLng = 116.397477;
        double startLat = 39.908692;
        double endLng = 121.472644;
        double endLat = 31.231706;

        double distance = calculateDistance(startLng, startLat, endLng, endLat);
        System.out.println("距离：" + distance + "米");
    }
}