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我想從雅虎的RSS數據，以獲得天氣，但我得到一個404（未找到），我認爲這是因爲它無法找到此GWT使用雅虎使用RSS/XML
http://xml.weather.yahoo.com/ns/rss/1.0
有沒有人知道我是否有一個新的指向？或者如果有什麼改變或者我想改變？
謝謝（代碼如下所示）
import java.net.MalformedURLException;
import java.net.URL;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;
import org.jaxen.JaxenException;
import org.jaxen.XPath;
import org.jaxen.dom4j.Dom4jXPath;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
import com.packtpub.gwtbook.widgets.client.Weather;
import com.packtpub.gwtbook.widgets.client.WeatherService;
public class WeatherServiceImpl extends RemoteServiceServlet implements
WeatherService {
public Weather getWeather(String zipCode) {
SAXReader reader = new SAXReader();
Weather weather = new Weather();
Document document;
try {
document = reader.read(new URL(
"http://xml.weather.yahoo.com/forecastrss?p=" + zipCode));
XPath expression = new Dom4jXPath("/rss/channel");
expression.addNamespace("yweather",
"http://xml.weather.yahoo.com/ns/rss/1.0");
expression.addNamespace("geo",
"http://www.w3.org/2003/01/geo/wgs84_pos#");
Node result = (Node) expression.selectSingleNode(document);
String error = result.valueOf("/rss/channel/description");
if (error.equals("Yahoo! Weather Error")) {
weather
.setError("Invalid zipcode "
+ zipCode
+ " provided. No weather information available for this location.");
return weather;
}
String descriptionSection = result
.valueOf("/rss/channel/item/description");
weather.setImageUrl(descriptionSection.substring(descriptionSection
.indexOf("src=") + 5,
descriptionSection.indexOf(".gif") + 4));
weather.setCity(result.valueOf("//yweather:location/@city"));
weather.setState(result.valueOf("//yweather:location/@region"));
weather.setChill(result.valueOf("//yweather:wind/@chill"));
weather.setDirection(result.valueOf("//yweather:wind/@direction"));
weather.setSpeed(result.valueOf("//yweather:wind/@speed"));
weather.setHumidity(result
.valueOf("//yweather:atmosphere/@humidity"));
weather.setVisibility(result
.valueOf("//yweather:atmosphere/@visibility"));
weather.setPressure(result
.valueOf("//yweather:atmosphere/@pressure"));
weather.setRising(result.valueOf("//yweather:atmosphere/@rising"));
weather.setSunrise(result.valueOf("//yweather:astronomy/@sunrise"));
weather.setSunset(result.valueOf("//yweather:astronomy/@sunset"));
weather.setCurrentCondition(result
.valueOf("//yweather:condition/@text"));
weather
.setCurrentTemp(result
.valueOf("//yweather:condition/@temp"));
weather.setLatitude(result.valueOf("//geo:lat"));
weather.setLongitude(result.valueOf("//geo:long"));
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (DocumentException e) {
e.printStackTrace();
} catch (JaxenException e) {
e.printStackTrace();
}
return weather;
}
}