Question

我正在尝试使用java获取一些天气数据。我使用以下java api从wunderground.com获取数据

https://code.google.com/p/wunderground-core/

他们在网站上提供的示例代码适用于（德国的多特蒙德）。但是，当我在美国的多特蒙德将密钥更改为波士顿时，我得到空指针错误。知道我可能做错了吗？请尝试并留下意见/建议。谢谢！

代码：

import de.mbenning.weather.wunderground.api.domain.DataSet;
import de.mbenning.weather.wunderground.api.domain.WeatherStation;
import de.mbenning.weather.wunderground.api.domain.WeatherStations;
import de.mbenning.weather.wunderground.impl.services.HttpDataReaderService;


public class weather {

    public static void main(String[] args)
    {

    // create a instance of a wunderground data reader
    HttpDataReaderService dataReader = new HttpDataReaderService();

    // select a wunderground weather station (ID "INORDRHE72" = Dortmund-Mengede)
    WeatherStation weatherStation = WeatherStations.ALL.get("INORDRHE72");
    // KMABOSTO22 is the ID for Boston South end
    //WeatherStation weatherStation = WeatherStations.ALL.get("KMABOSTO32");

    // set selected weather station to data reader
    dataReader.setWeatherStation(weatherStation);

    // get current (last) weather data set from selected station
    DataSet current = dataReader.getCurrentData();

    // print selected weather station ID
    System.out.println(weatherStation.getStationId());

    // print city, state and country of weather station
    System.out.println(weatherStation.getCity() + " " + weatherStation.getState() + " " + weatherStation.getCountry());

    //`enter code here` print datetime of measure and temperature ...
    System.out.println(current.getDateTime() + " " + current.getTemperature());
    }

}

Answer 1

查看Wunderground API的源代码。

svn checkout http://wunderground-core.googlecode.com/svn/trunk/ wunderground-core-read-only

在 de.mbenning.weather.wunderground.api.domain 包中，有一个名为 WeatherStations 的类。在那里，您可以找到您可以在代码中调用的所有气象站的内容。现在只有几个：

public static final Map<String, WeatherStation> ALL = new HashMap<String, WeatherStation>();
static {
    ALL.put("INRWKLEV2", INRWKLEV2_KLEVE);
    ALL.put("INORDRHE110", INORDRHE110_GOCH);
    ALL.put("IDRENTHE48", IDRENTHE48_COEVORDEN);
    ALL.put("IZEELAND13", IZEELAND13_GOES);
    ALL.put("INORDRHE72", INORDRHE72_DORTMUND);
    ALL.put("INOORDBR35", INOORDBR35_BOXMEER);
};

所有其他人都无法工作。

Answer 2

它的工作原理：您可以实例化在WUnderground上注册的每个气象站。可以将station id设置为contructor参数：

WeatherStation aWeatherStation = new WeatherStation("INORDRHE72");

HttpDataReaderService dataReader = new HttpDataReaderService();
dataReader.setWeatherStation(aWeatherStation );

Double currentTemperature = dataReader.getCurrentData().getTemperature();

使用java和wunderground api获取天气数据

2 个答案: