java获取天气信息

通过天气信息接口获取天气信息，首先要给项目导入程序所需要的包，具体需要如下几个包：

json-lib-2.4.jar

ezmorph-1.0.6.jar

commons-beanutils-1.8.3.jar

commons-collections-3.2.1.jar

commons-lang-2.6.jar

commons-logging-1.1.3.jar

源码如下：

 package com.web.test;

 import java.io.BufferedReader;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.net.SocketTimeoutException;
 import java.net.URL;
 import java.net.URLConnection;
 import java.util.HashMap;
 import java.util.Map;

 import net.sf.json.JSONObject;

 public class WeatherHelper {

     /**
      * @param args
      * @throws IOException
      */
     public static void main(String[] args) throws IOException {
         // TODO Auto-generated method stub
         System.out.println(getWeather("101010100"));//北京的天气信息
         System.out.println(getWeather("101010100").get("date").toString());
     }

     /**
      * 获得天气信息
      * @param cityid 城市ID
      * @return 天气信息
      * @throws IOException
      */
     public static Map<String, String> getWeather(String cityid) throws IOException{
         String weather = "";
         URLConnection connectionData;
         BufferedReader br;// 读取data数据流
         StringBuilder sb = null;

         // 连接中央气象台的API
         URL url = new URL("http://m.weather.com.cn/data/" + cityid + ".html");
         connectionData = url.openConnection();
         connectionData.setConnectTimeout(1000);
         try {
             br = new BufferedReader(new InputStreamReader(connectionData.getInputStream(), "UTF-8"));
             sb = new StringBuilder();
             String line = null;
             while ((line = br.readLine()) != null)
                 sb.append(line);
         } catch (SocketTimeoutException e) {
             System.out.println("连接超时");
         } catch (FileNotFoundException e) {
             System.out.println("加载文件出错");
         }
         weather = sb.toString();
         System.out.println(weather);
         JSONObject jsonData = JSONObject.fromObject(weather);
         JSONObject jsonWeather = jsonData.getJSONObject("weatherinfo");
         Map<String, String> weatherInfo = new HashMap<String, String>();
         weatherInfo.put("cityId", jsonWeather.getString("cityid").toString());//id
         weatherInfo.put("cityName", jsonWeather.getString("city").toString());//名称
         weatherInfo.put("date", jsonWeather.getString("date_y").toString());//日期
         weatherInfo.put("week", jsonWeather.getString("week").toString());//星期
         weatherInfo.put("temp", jsonWeather.getString("temp1").toString());//温度
         weatherInfo.put("weather", jsonWeather.getString("weather1").toString());//天气现象
         weatherInfo.put("wind", jsonWeather.getString("wind1").toString());//风
         weatherInfo.put("fl", jsonWeather.getString("fl1").toString());//风力
         weatherInfo.put("fx", jsonWeather.getString("fx1").toString());//风向

         return weatherInfo;
     }

 }