Java操作指南：高德地图API的路线交通态势查询功能详解

<dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>fastjson</artifactId>
   <version>1.2.62</version>
</dependency>
<dependency>
   <groupId>com.squareup.okhttp3</groupId>
   <artifactId>okhttp</artifactId>
   <version>3.12.0</version>
</dependency>

import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

import java.io.IOException;
import java.util.Objects;

public class TrafficRouteQuery {
    private static final String API_KEY = "your_api_key";

    // 请求URL
    private static final String API_URL = "https://restapi.amap.com/v3/traffic/status/rectangle";

    public static void main(String[] args) {
        OkHttpClient client = new OkHttpClient();

        String rectangle = "116.351147,39.966309;116.357134,39.968727";
        String url = API_URL + "?key=" + API_KEY + "&rectangle=" + rectangle;

        Request request = new Request.Builder()
                .url(url)
                .build();

        try {
            Response response = client.newCall(request).execute();
            String responseBody = Objects.requireNonNull(response.body()).string();
            System.out.println(responseBody);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

public class TrafficRouteQuery {
    // ... 上述代码省略 ...

    public static void main(String[] args) {
        // ... 上述代码省略 ...

        try {
            // 发送请求并获取响应
            Response response = client.newCall(request).execute();
            String responseBody = Objects.requireNonNull(response.body()).string();

            // 解析JSON数据
            JSONObject json = JSONObject.parseObject(responseBody);
            JSONArray roads = json.getJSONArray("road");

            // 遍历交通态势查询结果
            for (int i = 0; i < roads.size(); i++) {
                JSONObject road = roads.getJSONObject(i);
                String name = road.getString("name");
                int status = road.getIntValue("status");
                System.out.println("道路名称：" + name);
                System.out.println("交通状态：" + getStatusText(status));
                System.out.println();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static String getStatusText(int status) {
        switch (status) {
            case 1:
                return "畅通";
            case 2:
                return "缓行";
            case 3:
                return "拥堵";
            case 4:
                return "严重拥堵";
            default:
                return "未知";
        }
    }
}