最近要用到web services，而这两天也比较有空，就弄了一个获取天气预报的Util。以前以为这有多难，因为数据来源是个困难。现在用web services的技术，发现下面这个是相当不错的。
下面就用java把具体的代码写写吧！
这里我采用比较简单的get请求调用，毕竟这也没什么秘密可言，就用最简单的就可以了。
还有，这里很多捕获异常的东西给我去掉了，自己加吧！
public final class WeatherUtil
{
private static String SERVICES_HOST = "www.webxml.com.cn";
private static String WEATHER_SERVICES_URL = "http://www.webxml.com.cn/WebServices/WeatherWebService.asmx/";
private static String SUPPORT_CITY_URL = WEATHER_SERVICES_URL
+ "getSupportCity?byProvinceName=ALL";
private static String WEATHER_QUERY_URL = WEATHER_SERVICES_URL
+ "getWeatherbyCityName?theCityName=";
private WeatherUtil(){}
public static InputStream getSoapInputStream(String url)
{
InputStream is = null; URL U = new URL(url);
URLConnection conn = U.openConnection();
conn.setRequestProperty("Host", SERVICES_HOST);
conn.connect();
is = conn.getInputStream();
return is;
}
//取得支持的城市列表
public static ArrayList<String> getSupportCity()
{
ArrayList cityList = null;
Document doc;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
DocumentBuilder db = dbf.newDocumentBuilder();
InputStream is = getSoapInputStream(SUPPORT_CITY_URL);
doc = db.parse(is);
NodeList nl = doc.getElementsByTagName("string");
int len = nl.getLength();
cityList = new ArrayList<String>(len);
for (int i = ; i < len; i++)
{
Node n = nl.item(i);
String city = n.getFirstChild().getNodeValue();
cityList.add(city);
}
is.close();
return cityList;
}
//取得城市的天气
public static ArrayList<String> getWeather(String city)
{
ArrayList weatherList = null;
Document doc;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
DocumentBuilder db = dbf.newDocumentBuilder();
//这里他的编码格式就是这样，我试了几个也没办法。。只好这样混过去了
InputStream is = getSoapInputStream(WEATHER_QUERY_URL
+ new String(city.getBytes("UTF-8"), "GBK"));
doc = db.parse(is);
NodeList nl = doc.getElementsByTagName("string");
int len = nl.getLength();
weatherList = new ArrayList<String>(len);
for (int i = ; i < len; i++)
{
Node n = nl.item(i);
String weather = n.getFirstChild().getNodeValue();
weatherList.add(weather);
}
is.close();
return weatherList;
} public static void main(String[] args) throws Exception
{
ArrayList<String> weatherList = WeatherUtil.getWeather("");
// ArrayList<String> weatherList = WeatherUtil.getSupportCity();
for (String weather : weatherList)
{
System.out.println(weather);
}
}
}