如何获取给定城市或地址的纬度和经度(java代码)？

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

public class GeocodingExample {
    public static void main(String[] args) {
        String city = "北京"; // 要查询的城市或地址

        try {
            // 对城市或地址进行URL编码
            String encodedCity = URLEncoder.encode(city, "UTF-8");

            // 构建请求URL
            String apiUrl = "https://apis.map.qq.com/ws/geocoder/v1/?address=" + encodedCity + "&key=YOUR_API_KEY";
            URL url = new URL(apiUrl);

            // 发送HTTP GET请求
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");

            // 读取API响应结果
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            StringBuilder response = new StringBuilder();
            String line;
            while ((line = reader.readLine()) != null) {
                response.append(line);
            }
            reader.close();

            // 解析JSON响应结果
            String json = response.toString();
            // TODO: 解析json获取纬度和经度

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}