java调用 webservices接口实现天气预报

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);
         }
     }
 }