用JAVA做一个天气预报webservice的客户端

悠悠 2022-08-08 06:47 175阅读 0赞

[http://blog.csdn.net/wfront/archive/2006/11/13/1382128.aspx][http_blog.csdn.net_wfront_archive_2006_11_13_1382128.aspx]

最近做的项目都是同webService有关的，自然就要关心一下webservice方面的资源。

[http://www.wopos.com/webservice/Weather.asmx?op=getWeather][http_www.wopos.com_webservice_Weather.asmx_op_getWeather] 是一个天气预报的webservice,从它的输出结果来看天气数据应该来自中央气象局的问天网。过这方面就不用再多关心了，我们关心的是怎样调用这个webservice。  
       首先登录[www.wopos.com/webservice/Weather.asmx?op=getWeather][http_www.wopos.com_webservice_Weather.asmx_op_getWeather]。可以看到如下的SOAP信息：

请求：

POST /webservice/Weather.asmx http/1.1  
Host: [www.wopos.com][]  
Content-Type: text/xml; charset=utf-8  
Content-Length: length  
SOAPAction: "[http://tempuri.org/getWeather][http_tempuri.org_getWeather]"

<?xml version="1.0" encoding="utf-8"?>  
<soap:Envelope xmlns:xsi="[http://www.w3.org/2001/XMLSchema-instance][http_www.w3.org_2001_XMLSchema-instance]" xmlns:xsd="[http://www.w3.org/2001/XMLSchema][http_www.w3.org_2001_XMLSchema]" xmlns:soap="[http://schemas.xmlsoap.org/soap/envelope/][http_schemas.xmlsoap.org_soap_envelope]">  
  <soap:Body>  
    <getWeather xmlns="[http://tempuri.org/][http_tempuri.org]">  
      <mCity>string</mCity>  
    </getWeather>  
  </soap:Body>  
</soap:Envelope>

XML部分全部复制下来创建一个XML文件（普通的文本文件也可以)，为了以后编程方面，把

...  
      <mCity>string</mCity>  
                      ...  
改成

...  
　 <mCity>＄\{city\}＄</mCity>  
                       ...

以weathersoap.xml保存在以后生成的类的同一目录。  
响应:

http/1.1 200 OK  
Content-Type: text/xml; charset=utf-8  
Content-Length: length

<?xml version="1.0" encoding="utf-8"?>  
<soap:Envelope xmlns:xsi="[http://www.w3.org/2001/XMLSchema-instance][http_www.w3.org_2001_XMLSchema-instance]" xmlns:xsd="h ttp://www.w3.org/2001/XMLSchema" xmlns:soap="h ttp://schemas.xmlsoap.org/soap/envelope/">  
  <soap:Body>  
    <getWeatherResponse xmlns="h ttp://tempuri.org/">  
      <getWeatherResult>string</getWeatherResult>  
    </getWeatherResponse>  
  </soap:Body>  
</soap:Envelope>

在后面对XML的解释要用到响应部分的XML描述。

package jaqcy.weatherreport.client;

import java.io.\*;  
import java.net.\*;  
import javax.xml.parsers.\*;  
import org.w3c.dom.\*;  
/\*\* \*//\*\*  
 \*  
 \* @author jaqcy  
 \*/  
public class WeatherReport  
...\{     
    private static String getSoapRequest(String city)//city为要查询天气的城市名  
    ...\{  
        try  
        ...\{  
            Class cls=Object.class;  
            InputStreamReader isr=new InputStreamReader(cls.getResourceAsStream("/jaqcy/weatherreport/client/weathersoap.xml"）);//读取存在weathersoap的SOAP信息  
            BufferedReader reader=new BufferedReader(isr);  
            String soap="";  
            String tmp;  
            while((tmp=reader.readLine())!=null)  
            ...\{  
                soap+=tmp;  
            \}             
            reader.close();  
            isr.close();  
            return soap.replace("＄\{city\}＄",city);//用传入的参数city替换原来的＄\{city\}＄  
        \}  
        catch (Exception ex)  
        ...\{  
            ex.printStackTrace();  
            return null;  
        \}  
    \}  
  /\*\*//\*  
    \*返回InputStream是因为w3c DOM中Document的parse方法可  
    \*以接受InputStream类型的参数，方面在下一步对XML的解释  
    \*/  
    private static InputStream getSoapInputStream(String city)throws Exception  
    ...\{  
        try  
        ...\{  
            String soap=getSoapRequest(city);  
            if(soap==null)  
            ...\{  
                return null;  
            \}  
            URL url=new URL("[http://www.wopos.com/webservice/Weather.asmx][http_www.wopos.com_webservice_Weather.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://tempuri.org/getWeather][http_tempuri.org_getWeather]""）;

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;  
        \}  
    \}  
/\*\*//\*  
  \*用W3C DOM对返回的XML进行解释  
  \*  
  \*/  
    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("getWeatherResult"）;  
            Node n=nl.item(0);  
            String weather=n.getFirstChild().getNodeValue();  
            is.close();  
            return weather;  
        \}  
        catch(Exception e)  
        ...\{  
            e.printStackTrace();  
            return null;  
        \}  
    \}  
\}

写个main方法检验一下结果：

public static void main(String\[\] args)throws Exception  
    ...\{  
        System.out.println(WeatherReport.getWeather("珠海"）);  
    \}

结果如下:

城市==珠海,日期==4．02-4．03,图1==http://weather.tq121.com.cn/images/a1.gif,图2==http://weather.tq121.com.cn/images/00.gif,天气==多云,温度==28℃~22℃,风==微风,紫外线==弱

结果是有点乱，不过只要把它分割开来也是很容易的事。  
        在自己的应用程序中加上天气预报的功能，对程序的竞争力也是有好处的，而且实现也相当的简单，何乐而不为呢？

本文来自CSDN博客，转载请标明出处：[http://blog.csdn.net/wfront/archive/2006/11/13/1382128.aspx][http_blog.csdn.net_wfront_archive_2006_11_13_1382128.aspx]

[http_blog.csdn.net_wfront_archive_2006_11_13_1382128.aspx]: http://blog.csdn.net/wfront/archive/2006/11/13/1382128.aspx
[http_www.wopos.com_webservice_Weather.asmx_op_getWeather]: http://www.wopos.com/webservice/Weather.asmx?op=getWeather
[www.wopos.com]: http://www.wopos.com
[http_tempuri.org_getWeather]: http://tempuri.org/getWeather
[http_www.w3.org_2001_XMLSchema-instance]: http://www.w3.org/2001/XMLSchema-instance
[http_www.w3.org_2001_XMLSchema]: http://www.w3.org/2001/XMLSchema
[http_schemas.xmlsoap.org_soap_envelope]: http://schemas.xmlsoap.org/soap/envelope/
[http_tempuri.org]: http://tempuri.org/
[http_www.wopos.com_webservice_Weather.asmx]: http://www.wopos.com/webservice/Weather.asmx