抓取天气实例

package tos.app.query.tools.weather.domain;

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;

public class WeatherReport {

 public WeatherReport() {
  super();
 }

 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 void main(String[] args) throws Exception {
  System.out.println(getWeather("长沙"));
  System.out.println("po&oi".split("&").length) ;
  System.out.println("##".split("#").length) ;
 }
}

package tos.app.query.tools.weather.domain;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class WeatherServlet extends HttpServlet{

 public void doGet(HttpServletRequest request, HttpServletResponse response)
                          throws ServletException, IOException {
  request.setCharacterEncoding("UTF-8") ;
  String city = request.getParameter("city") ;
  String info = WeatherReport.getWeather(city) ;
  request.setAttribute("info", info) ;
  request.getRequestDispatcher("/weatherInfo.jsp").forward(request, response) ;
    }

   public void doPost(HttpServletRequest request, HttpServletResponse response)
                          throws ServletException, IOException {

        this.doGet(request, response) ;
   }
}

 

<%@ page language="java" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>城市天气信息</title>
 <meta http-equiv="pragma" content="no-cache">
 <meta http-equiv="cache-control" content="no-cache">
 <meta http-equiv="expires" content="0">   
 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
 <meta http-equiv="description" content="This is my page">
 <LINK rel="stylesheet" type="text/css" href="<%=request.getContextPath()%>/views/common/styles/style.css">
  </head>
 
  <body>
    <%
    String info = (String) request.getAttribute("info") ;
    if(info.equals("#")) {
    %>
    <h1>该城市暂不被支持天气预报服务</h1>
    <%
    } else {
    String[] infos = info.split("#") ;
    %>
    <table border="1">
     <tr>
     <td colspan="3">
     <strong><font color="blue">72小时天气预报</font>
     <font color="red">
     <!-- 城市名称 -->
     <%=infos[0]%>&nbsp;&nbsp;&nbsp;<%=infos[1]%>
     </font>
     <font size="-1">
     <%=infos[4] %>发布
     </font>
     </strong>
     </td>
     </tr>
     <tr align="center">
     <td>
     <table>
     <tr align="center">
     <!-- 日期 -->
     <td>
     <font size="-1">
     <%=infos[6] %>
     </font>
     </td>
     </tr>
     <tr align="center">
     <!-- 天气图标 -->
     <td>
     <img src="<%=request.getContextPath()%>/images/a_<%=infos[8]%>" />
     <img src="<%=request.getContextPath()%>/images/a_<%=infos[9]%>" />
     </td>
     </tr>
     <tr align="center">
     <!-- 天气细则 -->
     <td>
     <font size="-1">
     <%=infos[5] %><br>
     <%=infos[7] %><br>
     </font>
     </td>
     </tr>
     </table>
     </td>
    
    
     <td>
     <table align="center">
     <tr align="center">
     <td>
     <!-- 第二天的时间 -->
     <font size="-1">
     <%=infos[13] %>
     </font>
     </td>
     </tr>
    
     <tr align="center">
     <td>
     <!-- 第二天的天气图标 -->
     <img src="<%=request.getContextPath()%>/images/a_<%=infos[15]%>">
     <img src="<%=request.getContextPath()%>/images/a_<%=infos[16]%>">
 </td>
     </tr>
    
     <tr align="center">
     <td>
     <!-- 第二天的天气细则 -->
     <font size="-1">
     <%=infos[12] %><br>
     <%=infos[14] %><br>
     </font>
     </td>
     </tr>
     </table>
     </td>
     <td>
     <table align="center">
     <tr align="center">
     <td>
     <!-- 第三天的天气时间 -->
     <font size="-1">
     <%=infos[18] %>
     </font>
  </td>
     </tr>
     <tr align="center">
     <td>
     <!-- 第三天的天气图标 -->
     <img src="<%=request.getContextPath()%>/images/a_<%=infos[20]%>" />
     <img src="<%=request.getContextPath()%>/images/a_<%=infos[21]%>" />
     </td>
     </tr>
     <tr align="center">
     <td>
     <!-- 第三天的天气细则 -->
     <font size="-1">
     <%=infos[17] %><br>
     <%=infos[19] %><br>
     </font>
     </td>
     </tr>
     </table>
     </td>
   </tr>
   <tr>
   <td colspan="3">
   <!-- 居家指数 -->
   <strong><font color="blue">温馨提醒</font></strong>
   </td>
   </tr>
   <tr>
   <td colspan="3">
  
   <table>
   <tr>
   <td>
   <img src="<%=request.getContextPath()%>/images/sun.gif" />
   </td>
   <td>
   <font size="-1">
   <%=infos[10] %>
   </font>
   </td>
   </tr>
   </table>
   </td>
   </tr>
   <tr>
   <td colspan="3">
    <%
    String str = "" ;
    String s1 = "" ;
    String s1Content = "" ;
    String s2 = "" ;
    String s2Content = "" ;
    String s3 = "" ;
    String s3Content = "" ;
    String s4 = "" ;
    String s4Content = "" ;
    String s5 = "" ;
    String s5Content = "" ;
    String s6 = "" ;
    String s6Content = "" ;
    String s7 = "" ;
    String s7Content = "" ;
    try {
     //这里开始进行具体详细测试
    str = infos[11] ;
    //穿衣指数
    s1 = str.substring(str.indexOf("穿衣指数："),str.indexOf("穿衣指数：")+4) ;
    s1Content = str.substring(str.indexOf("穿衣指数：")+5,str.indexOf("感冒指数：")) ;
    //感冒指数
    s2 = str.substring(str.indexOf("感冒指数："),str.indexOf("感冒指数：")+4) ;
    s2Content = str.substring(str.indexOf("感冒指数：")+5,str.indexOf("晨练指数：")) ;
   
    //晨练指数
    s3 = str.substring(str.indexOf("晨练指数："),str.indexOf("晨练指数：")+4) ;
    s3Content = str.substring(str.indexOf("晨练指数：")+5,str.indexOf("交通指数：")) ;
    //交通指数
    s7 = str.substring(str.indexOf("交通指数："),str.indexOf("交通指数：")+4) ;
    s7Content = str.substring(str.indexOf("交通指数：")+5,str.indexOf("中暑指数：")) ;
    //中暑指数
    s4 = str.substring(str.indexOf("中暑指数："),str.indexOf("中暑指数：")+4) ;
    s4Content = str.substring(str.indexOf("中暑指数：")+5,str.indexOf("防晒指数：")) ;
    //防晒指数
    s5 = str.substring(str.indexOf("防晒指数："),str.indexOf("防晒指数：")+4) ;
    s5Content = str.substring(str.indexOf("防晒指数：")+5,str.indexOf("旅行指数：")) ;
    //旅行指数
    s6 = str.substring(str.indexOf("旅行指数："),str.indexOf("旅行指数：")+4) ;
    s6Content = str.substring(str.indexOf("旅行指数：")+5) ;
    %>
     <table>
   <tr>
   <td width="50">
   <img src="<%=request.getContextPath()%>/images/zhishu_01.gif" />
   </td>
   <td>
   <strong>
   <font size="-1">
   <%=s1 %>&nbsp;
   </font>
   </strong>
   </td>
   <td>
   <font size="-1">
   <%=s1Content %>
   </font>
   </td>
   </tr>
   <tr>
   <td width="50">
   <img src="<%=request.getContextPath()%>/images/zhishu_20.gif" />
   </td>
   <td>
   <strong>
   <font size="-1">
   <%=s2 %>&nbsp;
   </font>
   </strong>
   </td>
   <td>
   <font size="-1">
   <%=s2Content %>
   </font>
   </td>
   </tr>
  
   <tr>
   <td width="50">
   <img src="<%=request.getContextPath()%>/images/zhishu_03.gif" />
   </td>
   <td>
   <strong>
   <font size="-1">
   <%=s3 %>&nbsp;
   </font>
   </strong>
   </td>
   <td>
   <font size="-1">
   <%=s3Content %>
   </font>
   </td>
   </tr>
   <tr>
   <td width="50">
   <img src="<%=request.getContextPath()%>/images/zhishu_22.gif" />
   </td>
   <td>
   <strong>
   <font size="-1">
   <%=s4 %>&nbsp;
   </font>
   </strong>
   </td>
   <td>
   <font size="-1">
   <%=s4Content %>
   </font>
   </td>
   </tr>
   <tr>
   <td width="50">
   <img src="<%=request.getContextPath()%>/images/zhishu_07.gif" />
   </td>
   <td>
   <strong>
   <font size="-1">
   <%=s5 %>&nbsp;
   </font>
   </strong>
   </td>
   <td>
   <font size="-1">
   <%=s5Content %>
   </font>
   </td>
   </tr>
   <tr>
   <td width="50">
   <img src="<%=request.getContextPath()%>/images/zhishu_31.gif" />
   </td>
   <td>
   <strong>
   <font size="-1">
   <%=s6 %>&nbsp;
   </font>
   </strong>
   </td>
   <td>
   <font size="-1">
   <%=s6Content %>
   </font>
   </td>
   </tr>
   <tr>
   <td width="50">
   <img src="<%=request.getContextPath()%>/images/zhishu_11.gif" />
   </td>
   <td>
   <strong>
   <font size="-1">
   <%=s7 %>&nbsp;
   </font>
   </strong>
   </td>
   <td>
   <font size="-1">
   <%=s7Content %>
   </font>
   </td>
   </tr>   
   </table>
  
   </td>
   </tr>
     </table>
    <%
    } catch(Exception e) {
     
    }
   
     %>
    <%
    }
    
     %>
     
  </body>
</html>