Java獲取未來6天的天氣預報

</pre><pre name="code" class="java">/**
 * 未來6天的天氣預報(java)
 * 需求：獲取未來6天的天氣預報，調用中央氣象臺API來實現的
 * eg:http://6du.in/14nqk
 */
import net.sf.json.JSONObject;
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.text.SimpleDateFormat;
import java.util.*;

public class Weather {
    private String Cityid;
    private URLConnection connectionData;
    private StringBuilder sb;
    private BufferedReader br;// 讀取data數據流
    private JSONObject jsonData;
    private JSONObject info;

    public Weather(String cityid) throws IOException {
        //解析本機IP地址
        this.Cityid=cityid;

        ///連接中央氣象臺的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("連接超時");
        } catch (FileNotFoundException e) {
            System.out.println("加載文件出錯");
        }

        String datas = sb.toString();

        jsonData = JSONObject.fromObject(datas);
        System.out.println(jsonData.toString());
        info = jsonData.getJSONObject("weatherinfo");

        //得到1到6天的天氣情況
        List< Map< String,Object>> list =new ArrayList<Map< String,Object>>();
        for(int i=1;i<=6;i++){
            //得到未來6天的日期
            Calendar cal = Calendar.getInstance();
            cal.add(Calendar.DAY_OF_YEAR, i-1);
            Date date = cal.getTime();
            SimpleDateFormat sf = new SimpleDateFormat("yyyy年MM月dd日");

            Map< String,Object> map = new HashMap< String, Object>();
            map.put("city", info.getString("city").toString());//城市
            map.put("date_y", sf.format(date));//日期
            map.put("week", getWeek(cal.get(Calendar.DAY_OF_WEEK)));//星期
            map.put("fchh", info.getString("fchh").toString());//發佈時間
            map.put("weather", info.getString("weather"+i).toString());//天氣
            map.put("temp", info.getString("temp"+i).toString());//溫度
            map.put("wind", info.getString("wind"+i).toString());//風況
            map.put("fl", info.getString("fl"+i).toString());//風速
            map.put("index", info.getString("index").toString());// 今天的穿衣指數
            map.put("index_uv", info.getString("index_uv").toString());// 紫外指數
            map.put("index_tr", info.getString("index_tr").toString());// 旅遊指數
            map.put("index_co", info.getString("index_co").toString());// 舒適指數
            map.put("index_cl", info.getString("index_cl").toString());// 晨練指數
            map.put("index_xc", info.getString("index_xc").toString());//洗車指數
            map.put("index_d", info.getString("index_d").toString());//天氣詳細穿衣指數
            list.add(map);
        }
        //控制檯打印出天氣
        for(int j=0;j< list.size();j++){
            Map< String,Object> wMap = list.get(j);
            System.out.println(wMap.get("city")+"\t"+wMap.get("date_y")+"\t"+wMap.get("week")+"\t"
                    +wMap.get("weather")+"\t"+wMap.get("temp")+"\t"+wMap.get("index_uv"));
        }
    }

    private String getWeek(int iw){
        String weekStr = "";
        switch (iw) {
            case 1:weekStr = "星期天";break;
            case 2:weekStr = "星期一";break;
            case 3:weekStr = "星期二";break;
            case 4:weekStr = "星期三";break;
            case 5:weekStr = "星期四";break;
            case 6:weekStr = "星期五";break;
            case 7:weekStr = "星期六";break;
            default:
                break;
        }
        return weekStr;
    }

    public static void main(String[] args) {
        try {
            new Weather("101010100"); // 101010100(北京)就是你的城市代碼
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}