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

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

他们在其网站上提供的示例代码适用于（德国的多特蒙德）。但是，当我将密钥从美国的多特蒙德更改为波士顿时，出现空指针错误。知道我做错了什么吗？请尝试并留下评论/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());
    }

}
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2 回答 2

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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，您将找到您可以在代码中调用的所有气象站的内容。目前只有几个：

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);
};

其他的都行不通。

于 2013-11-24T17:59:36.217 回答
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它有效：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();
于 2014-01-09T12:05:32.450 回答