微信订阅号天气预报功能的实现(java版)

实现天气预报的功能我用的是车联网的api，所以首先我们在百度开发者中心api中找到车联网api，然后在左侧导航栏的接口说明找到天气查询的接口说明，如下图：

然后我们看到返回的json格式数据：

整套开发体系我是用的刘峰老师的那一套，然后是在他的那一套框架上开发的，大家有什么问题可以去看看他的，写的很详细的。接下来在搭建好的微信开发框架中，我们根据返回的json数据格式做相应的实现。首先写javabean层

package com.yc.bean;import java.util.List;import java.util.Map;public class Weather {private String currentCity;//当前城市private List<Map<String,String>> index;//返回json中的index数组private List<Map<String,String>> weather_data;//返回的json数据中的weather_data数组public String getCurrentCity() {return currentCity;}public void setCurrentCity(String currentCity) {this.currentCity = currentCity;}public List<Map<String, String>> getIndex() {return index;}public void setIndex(List<Map<String, String>> index) {this.index = index;}public List<Map<String, String>> getWeather_data() {return weather_data;}public void setWeather_data(List<Map<String, String>> weather_data) {this.weather_data = weather_data;}}

然后写相应的功能实现类

package com.yc.service;import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.io.UnsupportedEncodingException;import java.net.HttpURLConnection;import java.net.URL;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import org.junit.Test;import net.sf.json.JSONArray;import net.sf.json.JSONObject;import com.yc.bean.Weather;import com.yc.message.resp.Article;import com.yc.message.resp.NewsMessage;import com.yc.utils.Constants;public class WeatherService {/**      * 发送http请求      *       * @param requestUrl 请求地址      * @return String      */      private static String httpRequest(String requestUrl) {          StringBuffer buffer = new StringBuffer();          try {              URL url = new URL(requestUrl);              HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();              httpUrlConn.setDoInput(true);              httpUrlConn.setRequestMethod("GET");              httpUrlConn.connect();              // 将返回的输入流转换成字符串              InputStream inputStream = httpUrlConn.getInputStream();              InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");              BufferedReader bufferedReader = new BufferedReader(inputStreamReader);                String str = null;              while ((str = bufferedReader.readLine()) != null) {                  buffer.append(str);              }              bufferedReader.close();              inputStreamReader.close();              // 释放资源              inputStream.close();              inputStream = null;              httpUrlConn.disconnect();            } catch (Exception e) {              e.printStackTrace();          }          return buffer.toString();      }          public static Weather weatherDetect(String place){    Weather weather=new Weather();    //天气查询地址    String queryUrl=Constants.SENDPATH4;        try {//对url进行编码queryUrl = queryUrl.replace("LOCATION", java.net.URLEncoder.encode(place, "UTF-8"));//调用天气查询接口String json = httpRequest(queryUrl);//System.out.println(json);//解析返回的jsonJSONObject jsonObj=JSONObject.fromObject(json);JSONArray results=jsonObj.getJSONArray("results");//System.out.println(results.toString());JSONObject resultsObject=(JSONObject) results.get(0);JSONArray index=resultsObject.getJSONArray("index");JSONArray weather_data=resultsObject.getJSONArray("weather_data");List<Map<String,String>> indexList=new ArrayList<Map<String,String>>();for(int i=0;i<index.size();i++){JSONObject info=index.getJSONObject(i);Map<String,String> map=new HashMap<String,String>();map.put("title", info.getString("title"));map.put("zs", info.getString("zs"));map.put("tipt", info.getString("tipt"));map.put("des", info.getString("des"));indexList.add(map);}weather.setIndex(indexList);//System.out.println(weather.getIndex());List<Map<String,String>> weather_dataList=new ArrayList<Map<String,String>>();for(int i=0;i<weather_data.size();i++){JSONObject info=weather_data.getJSONObject(i);Map<String,String> map=new HashMap<String,String>();map.put("date", info.getString("date"));map.put("dayPictureUrl", info.getString("dayPictureUrl"));map.put("nightPictureUrl", info.getString("nightPictureUrl"));map.put("weather", info.getString("weather"));map.put("wind", info.getString("wind"));map.put("temperature", info.getString("temperature"));weather_dataList.add(map);}weather.setWeather_data(weather_dataList);//System.out.println(weather.getWeather_data());} catch (UnsupportedEncodingException e) {e.printStackTrace();}return weather;    }        public static void main(String[] args) {      weatherDetect("长沙").getIndex();    System.out.println(weatherDetect("长沙").getIndex());    }    }

</pre><pre name="code" class="java">在这里我封装了一个类，专门放一个api调用连接的，之前在WeatherService调用的即SENDPATH4，后面的apikey大家可以换成自己在百度开发者的

<pre name="code" class="java">package com.yc.utils;/** * 一些常用的链接 * @author Administrator * */public class Constants {//手机号码归属地查询public static final String SENDPATH="http://webservice.webxml.com.cn/WebServices/MobileCodeWS.asmx/getMobileCodeInfo";//笑话public static final String SENDPATH2="http://api100.duapp.com/joke/?appkey=trialuser";//智能聊天//public static final String SENDPATH3="http://www.wendacloud.com/openapi/api?key=bbab79b3f2feaf07e40553265f112aae&info=";public static final String SENDPATH3="http://xiao.douqq.com/api.php?msg=";//天气查询public static final String SENDPATH4="http://api.map.baidu.com/telematics/v3/weather?location=LOCATION&output=json&ak=81218080E79C9685b35e757566d8cbe5";//热门影片public static final String SENDPATH5="http://api.map.baidu.com/telematics/v3/movie?qt=hot_movie&location=LOCATION&output=json&ak=81218080E79C9685b35e757566d8cbe5";//景点详情public static final String SENDPATH6="http://api.map.baidu.com/telematics/v3/travel_attractions?id=ID&output=json&ak=81218080E79C9685b35e757566d8cbe5";}

以下是在调用类实现的调用：

//天气查询服务            else if(content.startsWith("天气")){            String keyWord = content.replaceAll("^天气", "").trim();            if ("".equals(keyWord)) {                          textMessage.setContent(getWeatherUsage());                          respMessage = MessageUtil.textMessageToXml(textMessage);                    }else if(keyWord.startsWith("明后")){                    keyWord = keyWord.replaceAll("^明后", "").trim();                    Weather weather=new Weather();                    weather=WeatherService.weatherDetect(keyWord);                    List<Map<String,String>> weather_data=new ArrayList<Map<String,String>>();                    weather_data=weather.getWeather_data();                                        // 创建图文消息                          NewsMessage newsMessage = new NewsMessage();                          newsMessage.setToUserName(fromUserName);                          newsMessage.setFromUserName(toUserName);                          newsMessage.setCreateTime(new Date().getTime());                          newsMessage.setMsgType(MessageUtil.RESP_MESSAGE_TYPE_NEWS);                          newsMessage.setFuncFlag(0);                                                 List<Article> articleList = new ArrayList<Article>();                        //多图文消息                        Article article1 = new Article();                          article1.setTitle(weather_data.get(1).get("date")+"\n"+weather_data.get(1).get("weather")+weather_data.get(1).get("wind")+weather_data.get(1).get("temperature"));                          article1.setDescription("");                          article1.setPicUrl(weather_data.get(1).get("dayPictureUrl"));                          article1.setUrl("");                                                Article article2 = new Article();                          article2.setTitle(weather_data.get(2).get("date")+"\n"+weather_data.get(2).get("weather")+weather_data.get(2).get("wind")+weather_data.get(2).get("temperature"));                          article2.setDescription("");                          article2.setPicUrl(weather_data.get(2).get("dayPictureUrl"));                          article2.setUrl("");                                                Article article3 = new Article();                          article3.setTitle("以上即为小编为您提供的"+keyWord+"未来两天的天气信息");                          article3.setDescription("");                          article3.setPicUrl("");                          article3.setUrl("");                                                articleList.add(article1);                        articleList.add(article2);                        articleList.add(article3);                        newsMessage.setArticleCount(articleList.size());                          newsMessage.setArticles(articleList);                          respMessage = MessageUtil.newsMessageToXml(newsMessage);                    }                        else{                    //获取返回的weather                    Weather weather=new Weather();                    weather=WeatherService.weatherDetect(keyWord);                    List<Map<String,String>> index=new ArrayList<Map<String,String>>();                    index=weather.getIndex();                    List<Map<String,String>> weather_data=new ArrayList<Map<String,String>>();                    weather_data=weather.getWeather_data();                                        String des="";                                        //将index里面数据的拼接                    for(int i=0;i<index.size();i++){                    des+=index.get(i).get("title")+":"+index.get(i).get("zs")+"。"+index.get(i).get("tipt")+":"+index.get(i).get("des")+"\n";                    }                                        // 创建图文消息                          NewsMessage newsMessage = new NewsMessage();                          newsMessage.setToUserName(fromUserName);                          newsMessage.setFromUserName(toUserName);                          newsMessage.setCreateTime(new Date().getTime());                          newsMessage.setMsgType(MessageUtil.RESP_MESSAGE_TYPE_NEWS);                          newsMessage.setFuncFlag(0);                                                 List<Article> articleList = new ArrayList<Article>();                        //多图文消息                        Article article1 = new Article();                          article1.setTitle(keyWord+"   "+weather_data.get(0).get("date"));                          article1.setDescription(weather_data.get(0).get("weather")+"\n"+weather_data.get(0).get("wind")+"\n"+weather_data.get(0).get("temperature")+"\n\n"+des);                          article1.setPicUrl(weather_data.get(0).get("dayPictureUrl"));                          article1.setUrl("");                                                articleList.add(article1);                          newsMessage.setArticleCount(articleList.size());                          newsMessage.setArticles(articleList);                          respMessage = MessageUtil.newsMessageToXml(newsMessage);                    }            }

好啦，整个天气预报的功能就已经实现了。下面让我们来看看运行的效果：

可能本文写的不是很清楚，如果大家有问题的话可以扫下面二维码加我关注，订阅号里有联系方式的。大家可以一起交流，毕竟我也是菜鸟，自己做的订阅号，有不足的地方也还请指教！谢谢

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