基于xml的实时天气项目

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,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,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,.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>

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