import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
 
public class WeatherAPI {
  private static final String BASE_URL = "http://api.map.baidu.com/weather/v1/";
  private static final String AK = "your_access_key"; // 请替换成你自己的密钥
 
  public static void main(String[] args) {
    try {
      String location = "上海"; // 要查询的位置
      String encodedLocation = URLEncoder.encode(location, "UTF-8");
      String apiUrl = BASE_URL + "?location=" + encodedLocation + "&ak=" + AK;
 
      URL url = new URL(apiUrl);
      HttpURLConnection connection = (HttpURLConnection) url.openConnection();
      connection.setRequestMethod("GET");
 
      int responseCode = connection.getResponseCode();
      if (responseCode == HttpURLConnection.HTTP_OK) {
        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        StringBuilder response = new StringBuilder();
        String line;
        while ((line = reader.readLine()) != null) {
          response.append(line);
        }
        reader.close();
 
        System.out.println(response.toString());
      } else {
        System.out.println("HTTP请求失败，错误代码：" + responseCode);
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}