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 = 0; 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 = 0; 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("59287");
        // ArrayList<String> weatherList = WeatherUtil.getSupportCity();
        for (String weather : weatherList)
        {
            System.out.println(weather);
        }
    }
}