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> index;//返回json中的index数组
private List> 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> getIndex() {
return index;
}
public void setIndex(List> index) {
this.index = index;
}
public List> getWeather_data() {
return weather_data;
}
public void setWeather_data(List> weather_data) {
this.weather_data = weather_data;
}
}
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json
JSONObject 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> indexList=new ArrayList>();
for(int i=0;i map=new HashMap();
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> weather_dataList=new ArrayList>();
for(int i=0;i map=new HashMap();
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());
}
}
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
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> weather_data=new ArrayList>();
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 articleList = new ArrayList();
//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> index=new ArrayList>();
index=weather.getIndex();
List> weather_data=new ArrayList>();
weather_data=weather.getWeather_data();
String des="";
//将index里面数据的拼接
for(int i=0;i articleList = new ArrayList();
//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);
}
} 
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
！
