package?com.sun.yan;

import?java.io.InputStream;
import?java.io.OutputStream;
import?java.io.OutputStreamWriter;
import?java.net.URL;
import?java.net.URLConnection;
import?javax.xml.parsers.DocumentBuilder;
import?javax.xml.parsers.DocumentBuilderFactory;
import?org.w3c.dom.Document;
import?org.w3c.dom.Node;
import?org.w3c.dom.NodeList;

/**
?*?Java?通過調(diào)用外部WebService實現(xiàn)天氣預(yù)報的功能
?*?@author?meditator
?*?@create?time?Mar?13?2010
?*?@typename?WeatherReport
?*/
public?class?WeatherReport?{
	/**?
	?*?獲取SOAP的請求頭，并替換其中的標(biāo)志符號為用戶輸入的城市?
	?*?
	?*?@param?city?
	?*????????????用戶輸入的城市名稱?
	?*?@return?客戶將要發(fā)送給服務(wù)器的SOAP請求?
	?*/
	private?static?String?getSoapRequest（String?city）?{
		StringBuilder?sb?=?new?StringBuilder（）;
		sb
				.append（“l?version=\“1.0\“?encoding=\“utf-8\“?>“
						+?“lns:xsi=\“http://www.w3.org/2001/xmlSchema-instance\“?“
						+?“xmlns:xsd=\“http://www.w3.org/2001/xmlSchema\“?“
						+?“xmlns:soap=\“http://schemas.xmlsoap.org/soap/envelope/\“>“
						+?“????lns=\“http://Webxml.com.cn/\“>“
						+?““?+?city
						+?“????“
						+?““）;
		return?sb.toString（）;
	}

	/**?
	?*?用戶把SOAP請求發(fā)送給服務(wù)器端，并返回服務(wù)器點(diǎn)返回的輸入流?
	?*?
	?*?@param?city?
	?*????????????用戶輸入的城市名稱?
	?*?@return?服務(wù)器端返回的輸入流，供客戶端讀取?
	?*?@throws?Exception?
	?*/
	private?static?InputStream?getSoapInputStream（String?city）?throws?Exception?{
		try?{
			String?soap?=?getSoapRequest（city）;
			if?（soap?==?null）?{
				return?null;
			}
			URL?url?=?new?URL（
					“http://www.webxml.com.cn/WebServices/WeatherWebService.asmx“）;
			URLConnection?conn?=?url.openConnection（）;
			conn.setUseCaches（false）;
			conn.setDoInput（true）;
			conn.setDoOutput（true）;

			conn.setRequestProperty（“Content-Length“?Integer.toString（soap
					.length（）））;
			conn.setRequestProperty（“Content-Type“?“text/xml;?charset=utf-8“）;
			conn.setRequestProperty（“SOAPAction“
					“http://Webxml.com.cn/getWeatherbyCityName“）;

			OutputStream?os?=?conn.getOutputStream（）;
			OutputStreamWriter?osw?=?new?OutputStreamWriter（os?“utf-8“）;
			osw.write（soap）;
			osw.flush（）;
			osw.close（）;

			InputStream?is?=?conn.getInputStream（）;
			return?is;
		}?catch?（Exception?e）?{
			e.print