我正在做一个项目,在这个项目中,我正在创建一个用于浇水的java应用程序,用于从网上获取天气信息。基于这个输出,如果我们植物需要水或not.For天气信息,我找到了一个API OpenWeatherMap,我尝试使用YouTube.I的教育视频来实现它。我对API的应用没有经验。我使用的视频是"https://www.youtube.com/watch?v=og5h5ppwXgU“.I试图像他那样实现我的程序,但我不会得到任何output.It只是打印打印声明中的内容,而不是实际数据。
public static Map<String,Object> jsonToMap(String str){
Map<String,Object> map = new Gson().fromJson(str,new
TypeToken<HashMap<String,Object>> () {}.getType());
return map;
}
public static void main(String[] args) {
String API_KEY = "16 digit Private Key";
String LOCATION = "Los Angeles,CA";
String urlString = "http://api.openweathermap.org/data/2.5/weather?
q=" + LOCATION + "&appid=" + API_KEY + "&units =imperial";
try{
StringBuilder result = new StringBuilder();
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
BufferedReader rd = new BufferedReader(new InputStreamReader (conn.getInputStream()));
String line;
while ((line = rd.readLine()) != null){
result.append(line);
}
rd.close();
System.out.println(result);
Map<String, Object > respMap = jsonToMap (result.toString());
Map<String, Object > mainMap = jsonToMap (respMap.get("main").toString());
Map<String, Object > windMap = jsonToMap (respMap.get("wind").toString());
System.out.println("Current Temperature: " + mainMap.get("temp") );
System.out.println("Current Humidity: " + mainMap.get("humidity") );
System.out.println("Wind Speed: " + windMap.get("speed") );
System.out.println("Wind Angle: " + windMap.get("deg") );
}catch (IOException e){
System.out.println(e.getMessage());
}
}我收到了gson库不存在的错误,但是在我用javadoc、类路径和soureces创建了自己的库之后,问题得到了解决,所以我认为openweathermap的correct.Also API密钥也是有效的,我只是无法获得获取在线信息的代码。
产出:
http://api.openweathermap.org/data/2.5/weatherq=Los洛杉矶,CA&appid="16位私钥“&单位=帝国
预期输出: LA的当前天气信息
发布于 2019-11-08 01:37:34
我在浏览器中用应用键测试了API。成功了。也许你应该对你的URL进行编码。它有一个空格,这是一个特殊的字符。
发布于 2019-11-08 04:55:51
给定纬度和经度的OpenWeatherMapApi实现。对于网络请求改造和Jsonschema2pojo创建模型。希望这能帮上忙。
public void getWeatherDetails(double latitude, double longitude) {
String url = "http://api.openweathermap.org/";
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(url) //This is the only mandatory call on Builder object.
.addConverterFactory(GsonConverterFactory.create()) // Convertor library used to convert response into POJO
.build();
WeatherApiService weatherApiService = retrofit.create(WeatherApiService.class);
weatherApiService.requestWeather(String.valueOf(latitude), String.valueOf(longitude), "metric", "10").enqueue(new UpasargaCallback<WeatherModel>() {
@Override
public void onResponse(Call<WeatherModel> call, Response<WeatherModel> response) {
if (response.isSuccessful()) {
if (response.body() != null) {
if (getView() != null) {
getView().onWeatherApiSuccess(response.body());
}
}
}
}
@Override
public void onFailure(Call<WeatherModel> call, Throwable t) {
if (getView() != null) {
getView().onWeatherApiFailure(String.valueOf(t.getMessage()));
}
}
});
}WeatherApiService
public interface WeatherApiService {
@Headers("x-api-key: " + AppConstants.WEATHER_API_KEY)
@GET("data/2.5/forecast")
Call<WeatherModel> requestWeather(@Query("lat") String lat,@Query("lon") String lon,@Query("units") String units,@Query("cnt") String count);
}https://stackoverflow.com/questions/58759133
复制相似问题