基于xml的实时天气项目

效果图

WeatherController

package com.wxh.ew.controller;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

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

import com.wxh.ew.dto.City;
import com.wxh.ew.http.Constant;
import com.wxh.ew.service.WeatherService;

public class WeatherController extends HttpServlet {

  
  public void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    this.doPost(request, response);   
  } 
  public void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    
    request.getSession().setAttribute("imgPath", Constant.BASE_IMG_URI);
    
    String flag=request.getParameter("flag");
    
     if("details".equals(flag)){
      details(request,response);//显示详情数据
    }else{
      list(request,response);
    } 
  }
  private void details(HttpServletRequest request,
      HttpServletResponse response) throws ServletException, IOException {
    
    String pyName=request.getParameter("pyName");
    String cityName=request.getParameter("cityName");
    
    WeatherService ws=new WeatherService();
    City city=ws.getCityWeather(pyName, cityName);
    request.setAttribute("city", city);
    request.getRequestDispatcher("details.jsp").forward(request, response);   
    
  }
  private void list(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    String pyName=request.getParameter("pyName");
    
    pyName= pyName!=null?pyName:"china";
    
    
    WeatherService ws=new WeatherService();
    List<City> cities=ws.getCitiesWeather(pyName);
    
    //继续传递当前查询的城市集合对应的pyName
    request.setAttribute("pyName", pyName);
    request.setAttribute("cities", cities);
    request.getRequestDispatcher("index.jsp").forward(request, response);   
    
  }

}

 City 

package com.wxh.ew.dto;

/**
 * 描述城市天气详情的javabean
 * @author Administrator
 *
 */

public class City {

  private String quName;//地区名称
  private String pyName;//下一级查询的文件名(下一级地区拼音名)
  private String cityName;//城市名字  
  private String state1;//天气状态1（对应的天气图片1）
  private String state2;//天气状态2（对应的天气图片2）
  private String stateDetailed;//天气详情
  private String windState;//风力情况
  private String windDir;//风向
  private String windPower;//风力级别
  private String humidity;//湿度
  private String lastTime;  //最近一次更新时间
  private int tem1;//最高温度
  private int tem2;//最低温度
  private int temNow;//当前温度
    
  public City() {
    
  }
  
  public City(String quName, String pyName, String cityName, String state1,
      String state2, String stateDetailed, String windState,
      String windDir, String windPower, String humidity, String lastTime,
      int tem1, int tem2, int temNow) {
    this.quName = quName;
    this.pyName = pyName;
    this.cityName = cityName;
    this.state1 = state1;
    this.state2 = state2;
    this.stateDetailed = stateDetailed;
    this.windState = windState;
    this.windDir = windDir;
    this.windPower = windPower;
    this.humidity = humidity;
    this.lastTime = lastTime;
    this.tem1 = tem1;
    this.tem2 = tem2;
    this.temNow = temNow;
  }
  
  public String getQuName() {
    return quName;
  }
  public void setQuName(String quName) {
    this.quName = quName;
  }
  public String getPyName() {
    return pyName;
  }
  public void setPyName(String pyName) {
    this.pyName = pyName;
  }
  public String getCityName() {
    return cityName;
  }
  public void setCityName(String cityName) {
    this.cityName = cityName;
  }
  public String getState1() {
    return state1;
  }
  public void setState1(String state1) {
    this.state1 = state1;
  }
  public String getState2() {
    return state2;
  }
  public void setState2(String state2) {
    this.state2 = state2;
  }
  public String getStateDetailed() {
    return stateDetailed;
  }
  public void setStateDetailed(String stateDetailed) {
    this.stateDetailed = stateDetailed;
  }
  public String getWindState() {
    return windState;
  }
  public void setWindState(String windState) {
    this.windState = windState;
  }
  public String getWindDir() {
    return windDir;
  }
  public void setWindDir(String windDir) {
    this.windDir = windDir;
  }
  public String getWindPower() {
    return windPower;
  }
  public void setWindPower(String windPower) {
    this.windPower = windPower;
  }
  public String getHumidity() {
    return humidity;
  }
  public void setHumidity(String humidity) {
    this.humidity = humidity;
  }
  public String getLastTime() {
    return lastTime;
  }
  public void setLastTime(String lastTime) {
    this.lastTime = lastTime;
  }
  public int getTem1() {
    return tem1;
  }
  public void setTem1(int tem1) {
    this.tem1 = tem1;
  }
  public int getTem2() {
    return tem2;
  }
  public void setTem2(int tem2) {
    this.tem2 = tem2;
  }
  public int getTemNow() {
    return temNow;
  }
  public void setTemNow(int temNow) {
    this.temNow = temNow;
  }

  @Override
  public String toString() {
    return "City [cityName=" + cityName + ", humidity=" + humidity
        + ", lastTime=" + lastTime + ", pyName=" + pyName + ", quName="
        + quName + ", state1=" + state1 + ", state2=" + state2
        + ", stateDetailed=" + stateDetailed + ", tem1=" + tem1
        + ", tem2=" + tem2 + ", temNow=" + temNow + ", windDir="
        + windDir + ", windPower=" + windPower + ", windState="
        + windState + "]";
  } 
  
}

Constant

package com.wxh.ew.http;

public class Constant {
  
  /**
   * 
   * 城市天气详情查询基本地址 
   * 
   */

  public static final String BASE_URI="http://flash.weather.com.cn/wmaps/xml/";
  
  public static final String BASE_IMG_URI="http://m.weather.com.cn/img/";
  
}

HttpRequest

package com.wxh.ew.http;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

/*
 * 用于发起http请求的网络连接类
 */

public class HttpRequest {
  
  public static InputStream read(String uri) throws IOException{
    InputStream is=null;
    //根据要请求的url地址构建一个URL对象
    URL url=new URL(uri);   
    //打开到指定地址的连接
    HttpURLConnection conn=(HttpURLConnection) url.openConnection();
    //设置请求方式为get
    conn.setRequestMethod("GET");
    //设置读取的超时时间
    conn.setReadTimeout(10000);
    //设置连接的超时时间
    conn.setConnectTimeout(5000);
    //获取响应码
    int stateCode=conn.getResponseCode();
    System.out.println("http response code:"+stateCode);  
    
    if(stateCode==HttpURLConnection.HTTP_OK){
      //如果响应成功,则获取服务端响应回来的数据
      is=conn.getInputStream();     
    }   
    return is;    
  } 
}

WeatherService

package com.wxh.ew.service;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

import javax.xml.parsers.ParserConfigurationException;

import org.xml.sax.SAXException;

import com.wxh.ew.dto.City;
import com.wxh.ew.http.Constant;
import com.wxh.ew.http.HttpRequest;
import com.wxh.ew.xml.XmlParser;

/**
 * 
 * 处理天气数据的业务逻辑层
 *   
 * @author Administrator
 *
 */
public class WeatherService {
  
  //查询指定城市下所有的天气情况
  
  public List<City> getCitiesWeather(String pyName){
    List<City> cities=null;
    InputStream is=null;      
    try {
      String uri= Constant.BASE_URI+pyName+".xml";
      is=HttpRequest.read(uri);
      XmlParser parser=new XmlParser();     
      cities=parser.getCities(is);
    } catch (IOException e) {
      e.printStackTrace();
    } catch (ParserConfigurationException e) {
      e.printStackTrace();
    } catch (SAXException e) {
      e.printStackTrace();
    }finally{     
        try {
          if(is!=null){
          is.close();
          }
        } catch (IOException e) {
          e.printStackTrace();
        }
      }   
    return cities;
  } 
  
  
  
  //查询指定某个城市的天气情况
  
  public City getCityWeather(String pyName,String cityName){
    List<City> cities=null;
    InputStream is=null;    
    City city=null; 
    try {
      String uri= Constant.BASE_URI+pyName+".xml";
      is=HttpRequest.read(uri);
      XmlParser parser=new XmlParser();     
      cities=parser.getCities(is);
      for (City c : cities) {
        if(c.getCityName().equals(cityName)){
          //判断当前遍历到的城市名字是否是需要被查询到的名字
          city=c;
          break;          
        }
      }     
    } catch (IOException e) {
      e.printStackTrace();
    } catch (ParserConfigurationException e) {
      e.printStackTrace();
    } catch (SAXException e) {
      e.printStackTrace();
    }finally{     
        try {
          if(is!=null){
          is.close();
          }
        } catch (IOException e) {
          e.printStackTrace();
        }
      }   
    return city;    
  } 
}

XmlParser

package com.wxh.ew.xml;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import com.wxh.ew.dto.City;

public class XmlParser {
  
  private DocumentBuilder builder;
  
  public XmlParser() throws ParserConfigurationException{
    builder=DocumentBuilderFactory.newInstance().newDocumentBuilder();
  }
  
  
  /**
   * 将指定的输入流解析为对应的JAVA对象
   * @param is 包含天气数据输入流
   * @return 返回解析获取的所有城市天气对象
   * @throws IOException 
   * @throws SAXException 
   */
  

  public List<City> getCities(InputStream is) throws SAXException, IOException{
    List<City> cities=new ArrayList<City>();
    
    Document document=builder.parse(is);
    
    //获取所有的city元素
    NodeList list=document.getElementsByTagName("city");
    
    for (int i = 0; i < list.getLength(); i++) {
      Element element=(Element)list.item(i);
      String quName=element.getAttribute("quName");
      String pyName=element.getAttribute("pyName");
      String cityName=element.getAttribute("cityname");
      String state1=element.getAttribute("state1");
      String state2=element.getAttribute("state2");
      String stateDetailed=element.getAttribute("stateDetailed");
      String windState=element.getAttribute("windState");
      String windDir=element.getAttribute("windDir");
      String windPower=element.getAttribute("windPower");
      String humidity=element.getAttribute("humidity");
      String lastTime=element.getAttribute("time");
      int tem1=Integer.parseInt(element.getAttribute("tem1"));
      int tem2=Integer.parseInt(element.getAttribute("tem2"));
      
      String tn=element.getAttribute("temNow");
      //获取当前温度，如果没有当前温度（省级别天气）则使用-10000代表无数据
      int temNow= (tn!=null&&!"".equals(tn)&& !"暂无实况".equals(tn))?Integer.parseInt(tn):-10000;
      
      //根据获取的数据创建city对象
      City city=new City(quName, pyName, cityName, state1, state2, stateDetailed, windState, windDir, windPower, humidity, lastTime, tem1, tem2, temNow);
      
      cities.add(city);
    }   
    return cities;
  }
  
}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
  xmlns="http://java.sun.com/xml/ns/javaee" 
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
  http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <servlet>
    <servlet-name>WeatherController</servlet-name>
    <servlet-class>com.wxh.ew.controller.WeatherController</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>WeatherController</servlet-name>
    <url-pattern>/weather</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>weather</welcome-file>
  </welcome-file-list>
</web-app>

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>实时天气查询</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="styles.css">
  -->
  </head>
  
  <style>
    .box_main{
      width:50%;
      min-width:400px;
      border:1px solid #808080;   
      margin:0 auto;
      border-radius:5px;
    }
    
    .title{
      width:100%;
      height:50px;
      background-color:#38B0FF;
      color:#ffffff;
      text-align:center;
      line-height:50px;
      font-size:25px;
    }  
    
    .tab_data table{
      width:100%;
      border:1px solid  #8194AA;  
      border-collapse: collapse;  
    }
    
    .tab_data table th,.tab_data table td{
    
      border:1px solid #8194AA;   
    }
    
    a{
      text-decoration: none;
      color:#000000;
    }
    
    a:HOVER {
      text-decoration: underline;
      color:#ff0000;    
    }
  
}
  
  </style>  
  <body>
        <div class="box_main">
          <div class="title">
          实时天气          
          </div>
          <div class="tab_data"> 
            <table>
            
            <tr>
              <td colspan="5"><a href="javascript:history.back();"><<返回</a></td>
            </tr>             
              <tr>
                <th>城市/地区</th>
                <th>天气</th>
                <th>温度</th>
                <th>风力情况</th>
                <th>下属地区天气</th>
              </tr>
              
              <c:forEach items="${cities }" var="city">               
              
              <tr>
                <td><a href="weather?flag=details&pyName=${city.pyName}&cityName=${city.cityName }">${city.cityName }</a></td>
                <td><img src="${imgPath}d${city.state1}.gif"/>${city.stateDetailed }</td>
                
                <td>${city.tem2}℃-${city.tem1}℃</td>
                <td>${city.windState} ${city.windDir } ${windPower}</td>
                
                <td><a href="weather?pyName=${city.pyName}">详情</a></td>
              </tr>
              </c:forEach>              
            </table>          
          </div>          
        </div>   
  </body>
</html>

details.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>实时天气查询</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="styles.css">
  -->
  </head>
  
  <style>
    .box_main{
      width:50%;
      min-width:400px;
      border:1px solid #808080;   
      margin:0 auto;
      border-radius:5px;
    }
    
    .title{
      width:100%;
      height:50px;
      background-color:#38B0FF;
      color:#ffffff;
      text-align:center;
      line-height:50px;
      font-size:25px;
    }  
    
    .tab_data table{
      width:100%;
      border:1px solid  #8194AA;  
      border-collapse: collapse;  
    }
    
    .tab_data table th,.tab_data table td{
    
      border:1px solid #8194AA;   
    }
    
    a{
      text-decoration: none;
      color:#000000;
    }
    
    a:HOVER {
      text-decoration: underline;
      color:#ff0000;    
    }
  
}
  
  </style>  
  <body>
        <div class="box_main">
          <div class="title">
          实时天气          
          </div>
          <div class="tab_data"> 
              <table>
                <tr>
                  <th>
                  <img src="${imgPath}d${city.state1}.gif"/><br>
                  <c:if test="${city.temNow!=-10000}">
                    ${city.temNow }℃
                  </c:if>
                  </th>
                </tr>
                <tr>
                  <th style="color:#ff0000;font-size:20pt">${city.stateDetailed}</th>
                </tr>
                <tr>
                  <th>${city.tem2}℃-${city.tem1}℃</th>
                </tr>
                
                <tr>
            <th>${city.windState}</th>
          </tr>
          <tr>
            <th>风向:<c:out value="${city.windDir}"></c:out></th>
          </tr>
          <tr>
            <th>风力:<c:out value="${city.windPower}"></c:out></th>
          </tr>
          <tr>
            <th>湿度:<c:out value="${city.humidity}"></c:out></th>
          </tr>
          <tr>
            <th>更新时间:<c:out value="${city.lastTime}"></c:out></th>
          </tr>               
              </table>  
          </div>          
        </div>   
  </body>
</html>