高德api空气质量java调用

下面是使用高德API查询空气质量的Java代码示例：

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;

public class AirQuality {

    private static final String KEY = "您的高德API Key";
    private static final String URL = "https://restapi.amap.com/v3/airquality/now";

    public static void main(String[] args) throws Exception {
        String city = "北京市";
        String url = URL + "?key=" + KEY + "&city=" + URLEncoder.encode(city, "UTF-8");
        HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
        connection.setRequestMethod("GET");
        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String line;
        StringBuilder response = new StringBuilder();
        while ((line = reader.readLine()) != null) {
            response.append(line).append("\n");
        }
        reader.close();
        System.out.println(response.toString());
    }
}

需要注意的是，您需要将代码中的`您的高德API Key`替换为您自己的高德API Key。另外，`city`参数可以替换为您需要查询的城市名。查询结果将以JSON格式返回。