微信公众号查询天气(Java)

「爱情、让人受尽委屈。」 2022-05-24 06:17 149阅读 0赞

## 天气预报接口 ##

[http://api.map.baidu.com/telematics/v3/weather][http_api.map.baidu.com_telematics_v3_weather]?

## 传递的参数 ##

![这里写图片描述][70]

## 返回的消息类型 ##

![这里写图片描述][70 1]  
json格式：

{
        "error": 0,
        "status": "success",
        "date": "2014-05-03",
        "results": [ { "currentCity": "北京", "weather_data": [ { "date": "周六(今天, 实时：22℃)", "dayPictureUrl": "http://api.map.baidu.com/images/weather/day/leizhenyu.png", "nightPictureUrl": "http://api.map.baidu.com/images/weather/night/duoyun.png", "weather": "雷阵雨转多云", "wind": "北风5-6级", "temperature": "24 ~ 11℃" }, { "date": "周日", "dayPictureUrl": "http://api.map.baidu.com/images/weather/day/duoyun.png", "nightPictureUrl": "http://api.map.baidu.com/images/weather/night/qing.png", "weather": "多云转晴", "wind": "北风4-5级", "temperature": "19 ~ 8℃" }, { "date": "周一", "dayPictureUrl": "http://api.map.baidu.com/images/weather/day/qing.png", "nightPictureUrl": "http://api.map.baidu.com/images/weather/night/qing.png", "weather": "晴", "wind": "微风", "temperature": "21 ~ 9℃" }, { "date": "周二", "dayPictureUrl": "http://api.map.baidu.com/images/weather/day/duoyun.png", "nightPictureUrl": "http://api.map.baidu.com/images/weather/night/qing.png", "weather": "多云转晴", "wind": "微风", "temperature": "21 ~ 10℃" } ] } ] }

xml格式：

<?xml version="1.0" encoding="utf-8" ?> 
    <CityWeatherResponse>
        <status>success</status>
        <date>2014-05-03</date>
        <results> 
    
            <currentCity>北京</currentCity>
            <weather_data>
                                <date>周六(今天, 实时：22℃)</date>
                    <dayPictureUrl>http://api.map.baidu.com/images/weather/day/leizhenyu.png</dayPictureUrl>
                    <nightPictureUrl>http://api.map.baidu.com/images/weather/night/duoyun.png</nightPictureUrl>
                    <weather>雷阵雨转多云</weather>
                    <wind>北风5-6级</wind>
                    <temperature>24 ~ 11℃</temperature>
                                <date>周日</date>
                    <dayPictureUrl>http://api.map.baidu.com/images/weather/day/duoyun.png</dayPictureUrl>
                    <nightPictureUrl>http://api.map.baidu.com/images/weather/night/qing.png</nightPictureUrl>
                    <weather>多云转晴</weather>
                    <wind>北风4-5级</wind>
                    <temperature>19 ~ 8℃</temperature>
                                <date>周一</date>
                    <dayPictureUrl>http://api.map.baidu.com/images/weather/day/qing.png</dayPictureUrl>
                    <nightPictureUrl>http://api.map.baidu.com/images/weather/night/qing.png</nightPictureUrl>
                    <weather>晴</weather>
                    <wind>微风</wind>
                    <temperature>21 ~ 9℃</temperature>
                                <date>周二</date>
                    <dayPictureUrl>http://api.map.baidu.com/images/weather/day/duoyun.png</dayPictureUrl>
                    <nightPictureUrl>http://api.map.baidu.com/images/weather/night/qing.png</nightPictureUrl>
                    <weather>多云转晴</weather>
                    <wind>微风</wind>
                    <temperature>21 ~ 10℃</temperature>
                        </weather_data>
            </results>
    </CityWeatherResponse>

## 测试账号url： ##

![这里写图片描述][70 2]

## 效果图： ##

![这里写图片描述][70 3]

## 完整代码如下: ##

![这里写图片描述][70 4]

## web.xml ##

<?xml version="1.0" encoding="UTF-8"?>
    
    <web-app version="3.0" 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_3_0.xsd">
    
    
         <servlet>
           <servlet-name>bb</servlet-name>
           <servlet-class>yiche.com.servlet.WeiXinServlet</servlet-class>
         </servlet>
        <servlet-mapping>
          <servlet-name>bb</servlet-name>
          <url-pattern>/ok.do</url-pattern>
        </servlet-mapping>
    </web-app>

## pom.xml ##

<dependencies>
    
    
        
        <dependency>
          <groupId>dom4j</groupId>
          <artifactId>dom4j</artifactId>
          <version>1.6</version>
        </dependency>
    
        <dependency>
          <groupId>com.thoughtworks.xstream</groupId>
          <artifactId>xstream</artifactId>
          <version>1.4</version>
        </dependency>
    
        <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>4.11</version>
    
        </dependency>
    
    
        
        <dependency>
          <groupId>com.alibaba</groupId>
          <artifactId>fastjson</artifactId>
          <version>1.2.7</version>
        </dependency>
    
        <dependency>
          <groupId>org.json</groupId>
          <artifactId>json</artifactId>
          <version>20131018</version>
        </dependency>
    
        
        <dependency>
          <groupId>com.github.iweinzierl</groupId>
          <artifactId>jsonformat</artifactId>
          <version>1.0</version>
        </dependency>
    
    
    
        
        <dependency>
          <groupId>jstl</groupId>
          <artifactId>jstl</artifactId>
          <version>1.2</version>
        </dependency>
    
    
        <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>servlet-api</artifactId>
          <version>2.5</version>
          
        </dependency>
    
      </dependencies>

## 封装的天气消息类 ##

public class Weather {
    
        private String date;
        private String dayPictureUrl;
        private String nightPictureUrl;
        private String weather;
        private String wind;
        private String temperature;
        }

public class Results {
    
    
        private String currentCity;
        private List<Weather> weather_data;
    
        }

public class Status {
    
    
        private String error;
        private String status;
        private String date;
        private List<Results> results;
    }

## 文本消息实体类： ##

public class Message {
    
    
        private String ToUserName;
    
        private String FromUserName;
    
        private Long CreateTime;
    
        private String MsgType;
    
        private String Content;
    
        private String MsgId;
        }

## Servlet方法： ##

*/
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
    
        req.setCharacterEncoding("UTF-8");
        resp.setCharacterEncoding("UTF-8");
        PrintWriter out = resp.getWriter();
        try {
            Map<String,String> map = MessgaeUtils.xmlToMap(req);
            String toUserName = map.get("ToUserName");
            String fromUserName = map.get("FromUserName");
            String msgType = map.get("MsgType");
            String content = map.get("Content");
    
            String message = null;
            //MessageUtil.MESSAGE_TEXT就是 text
            if(MessgaeUtils.MESSAGE_TEXT.equals(msgType)){
                if(content.endsWith("天气")){
                    String keyWord = content.replaceAll("天气", "").trim();
    
                    message = MessgaeUtils.initText(toUserName, fromUserName, BaiDuWeather.getSend(keyWord));
                }
            }
            out.print(message);
        }catch (Exception e) {
            // TODO: handle exception,
            e.printStackTrace();
            out.close();
        }
    }

## 访问天气接口 ##

public class BaiDuWeather { private static String api = "http://api.map.baidu.com/telematics/v3/weather?"; private static String output = "json"; //你前面百度地图API上申请的key" private static String ak ="81218080E79C9685b35e757566d8cbe5"; public static String getSend(String str) { // 将传进来的城市转码 try { str = URLEncoder.encode(str, "utf-8"); } catch (Exception e) { e.printStackTrace(); } // 拼接url StringBuffer buf = new StringBuffer(); buf.append("location="); buf.append(str); buf.append("&output="); buf.append(output); buf.append("&ak="); buf.append(ak); String param = buf.toString(); // 这是接收百度API返回的内容 String result = ""; String urlName = api + param; URL realUrl; try { realUrl = new URL(urlName); // 打开和URL之间的连接 URLConnection conn = realUrl.openConnection(); // conn.setDoInput(true); BufferedReader br = new BufferedReader(new InputStreamReader( conn.getInputStream(),"UTF-8")); String line = br.readLine(); while (line != null) { result += line; line = br.readLine(); } br.close(); Gson gson = new Gson(); Status status = gson.fromJson(result, Status.class); List<Results> results=status.getResults(); StringBuffer bf=new StringBuffer(); for(int i=0;i<results.size();i++){ Results res=results.get(i); List<Weather> weather_data=res.getWeather_data(); for(int j=0;j<weather_data.size();j++){ Weather weather=weather_data.get(j); String date=weather.getDate(); String weath=weather.getWeather(); String temp=weather.getTemperature(); bf.append(date+" "); bf.append(weath+" "); bf.append(temp+" "); bf.append("\n"); } } return bf.toString(); } catch (Exception e) { e.printStackTrace(); } return null; } public static void main(String[] args) { String json=getSend("湘西"); System.out.println(json); } }

## 消息转化转换Utils ##

public class MessgaeUtils { 
    
    
        public static final String MESSAGE_TEXT = "text";
    
        public static final String MESSAGE_IMAGE = "image";
    
        public static final String MESSAGE_VOICE = "voice";
    
        public static final String MESSAGE_VIDEO = "video";
    
        public static final String MESSAGE_SHORTVIDEO = "shortvideo";
    
        public static final String MESSAGE_LINK = "link";
    
        public static final String MESSAGE_LOCATION = "location";
    
        public static final String MESSAGE_EVENT = "event";
    
        public static final String MESSAGE_SUBSCRIBE = "subscribe";
    
        public static final String MESSAGE_UNSUBSCRIBE = "unsubscribe";
    
        public static final String MESSAGE_CLICK = "CLICK";
    
        public static final String MESSAGE_VIEW = "VIEW";
    
        public static final String MESSAGE_SCAN = "SCAN";
    
    
           //关注初始化消息内容
          public static String menuText(){
              StringBuffer b=new StringBuffer();
              b.append("欢饮来到我的微信公众号,请选择\n\n");
              b.append("1、我很帅。\n\n");
              b.append("2、我贼鸡儿帅。\n\n");
              b.append("回复、主菜单。\n\n");
              return b.toString();
          }
    
          public static String initText(String toUserName,String fromUserName,String content){
               Message message=new Message();
               message.setToUserName(fromUserName);
               message.setFromUserName(toUserName);
               message.setMsgType(MESSAGE_TEXT);
               message.setContent(content);
               message.setCreateTime(new Date().getTime());
               return  objectToXml(message);
          }
           /*将xml格式转化为map*/
            public static Map<String,String> xmlToMap(HttpServletRequest request) throws Exception{
               Map<String,String> map=new HashMap<>();
    
                SAXReader reader=new SAXReader();
                InputStream inputStream=request.getInputStream();
                Document doc=reader.read(inputStream);
                Element root=doc.getRootElement();//得到根节点
                List<Element> list=root.elements();//根节点下的所有的节点
                for(Element e:list){
                    map.put(e.getName(),e.getText());
                }
    
                inputStream.close();
                return  map;
            }
    
            /*将我们的消息内容转变为xml*/
    
            public static String objectToXml(Message message){
                XStream xStream=new XStream();
                xStream.alias("xml", message.getClass());
                return xStream.toXML(message);
            }
    }

[http_api.map.baidu.com_telematics_v3_weather]: http://api.map.baidu.com/telematics/v3/weather
[70]: /images/20220524/672f14b9e9564562b65e819af191aa9b.png
[70 1]: /images/20220524/c84ff39660ba40d6a6019635404727de.png
[70 2]: /images/20220524/d68772c6e26046dfa7f3fd3865a490f0.png
[70 3]: /images/20220524/d076f07c1e214322acc70f66aecd2eb0.png
[70 4]: /images/20220524/1c7424d329a849cfaaa74083115dd6fa.png