WebServices天气预报

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 通过调用外部WebService实现天气预报的功能
* @author 测试成功！
* @create time Mar 13, 2010
* @typename WeatherReport
*/
public class WeatherUtil { 
/** 
* 获取SOAP的请求头，并替换其中的标志符号为用户输入的城市 
* 
* @param city 
*            用户输入的城市名称 
* @return 客户将要发送给服务器的SOAP请求 
*/ 
private static String getSoapRequest(String city) { 
   StringBuilder sb = new StringBuilder(); 
   sb.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>" 
       + "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" " 
       + "xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" " 
       + "xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">" 
       + "<soap:Body>    <getWeatherbyCityName xmlns=\"http://WebXml.com.cn/\">" 
       + "<theCityName>" + city 
       + "</theCityName>    </getWeatherbyCityName>" 
       + "</soap:Body></soap:Envelope>"); 
   return sb.toString(); 
} 

/** 
* 用户把SOAP请求发送给服务器端，并返回服务器点返回的输入流 
* 
* @param city 
*            用户输入的城市名称 
* @return 服务器端返回的输入流，供客户端读取 
* @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.printStackTrace(); 
    return null; 
   } 
} 

/** 
* 对服务器端返回的XML进行解析 
* 
* @param city 
*            用户输入的城市名称 
* @return 字符串 用,分割 
*/ 
public static String getWeather(String city) { 
   try { 
    Document doc; 
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
    dbf.setNamespaceAware(true); 
    DocumentBuilder db = dbf.newDocumentBuilder(); 
    InputStream is = getSoapInputStream(city); 
    doc = db.parse(is); 
    NodeList nl = doc.getElementsByTagName("string"); 
    StringBuffer sb = new StringBuffer(); 
    for (int count = 0; count < nl.getLength(); count++) { 
     Node n = nl.item(count); 
     if(n.getFirstChild().getNodeValue().equals("查询结果为空！")) { 
      sb = new StringBuffer("#") ; 
      break ; 
     } 
     sb.append(n.getFirstChild().getNodeValue() + "#\n"); 
    } 
    is.close(); 
    return sb.toString(); 
   } catch (Exception e) { 
    e.printStackTrace(); 
    return null; 
   } 
} 

public static String getTodayeWeather(){ 
    String weather=""; 
    String city="兰州"; 
    StringBuffer sb = new StringBuffer(); 
    try { 
        Document doc; 
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
        dbf.setNamespaceAware(true); 
        DocumentBuilder db = dbf.newDocumentBuilder(); 
        InputStream is = getSoapInputStream(city); 
        doc = db.parse(is); 
        NodeList nl = doc.getElementsByTagName("string"); 
        for (int count = 0; count < nl.getLength(); count++) { 
        Node n = nl.item(count); 
        if(n.getFirstChild().getNodeValue().equals("查询结果为空！")) { 
          sb = new StringBuffer("#") ; 
          break ; 
        } 
          sb.append(n.getFirstChild().getNodeValue() + "#\n"); 
        } 
        is.close(); 
       } catch (Exception e) { 
           e.printStackTrace(); 
           return null; 
       } 
       String wearths=sb.toString(); 
       String[] weath=wearths.split("#"); 
       for (int i=0;i<weath.length;i++){ 
           System.out.println(i+":"+weath[i].trim()); 
       } 
       String thisweath=weath[6]; 
       String[] thisweat=thisweath.split(" "); 
       weather=thisweat[1]+" "+weath[5]; 
    return weather; 
} 

/** 
* 测试用 
* @param args 
* @throws Exception 
*/ 
public static void main(String[] args) throws Exception { 
   System.out.println(getTodayeWeather()); 
//   System.out.println("po&oi".split("&").length) ; 
//   System.out.println("##".split("#").length) ; 
} 
}