智能天气查询 java java天气预报程序

package myweather;
import java.io.*;

import java.net.*;

import javax.xml.parsers.*;

import org.w3c.dom.*;

import javax.swing.JOptionPane;public class MyWeather {

    private static String getSoapRequest(String city) {

     try {

     InputStreamReader isr = new InputStreamReader(new FileInputStream("weather.xml"));

     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);

     } catch (Exception ex) {

     ex.printStackTrace();

     return null;

     }

     }

     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(new String(soap.getBytes(),"utf-8"));

                 osw.write(soap);

                 osw.flush();

                 osw.close();                 InputStream is=conn.getInputStream();

                 return is;

             }

             catch(Exception e)

             {

                 e.printStackTrace();

                 return null;

             }

    }

    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("getWeatherbyCityNameResult");

           Node n=nl.item(0);

           //JOptionPane.showMessageDialog(null,n.getChildNodes().getLength());

           for (int i=0;i<n.getChildNodes().getLength()-1;i++)

           {

             String weather=n.getChildNodes().item(i).getTextContent();

             System.out.print(weather);

           }

           is.close();

           return "null";

       }

       catch(Exception e)

       {

           e.printStackTrace();

           return null;

       }

   }

   public static void main (String [] args )throws Exception

   {

       //System.out.println(MyWeather.getWeather("上海"));

       MyWeather.getWeather("广州");

   }}
//将以下XML保存为weather.xml
/*XML:<?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>*/