天气预报需要用到的jar包

ezmorph-1.0.6.jar 
commons-lang 2.4 
commons-beanutils 1.7.0 
commons-collections 3.2 
commons-logging 1.1.1

    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.ArrayList;
    import java.util.Calendar;
    import java.util.Date;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;

    import net.sf.json.JSONObject;

    /**
     * java调用中央气象局天气预报接口
     * 
     * @author Administrator
     * 
     */
    public class WeatherUtil {

        /**
         * 获取一周天气<br>
         * 方 法 名：getWeekWeatherMap <br>
         * @param Cityid  城市编码
         */
        public static List<Map<String, Object>> getWeekWeatherMap(String Cityid)
                throws IOException, NullPointerException {
            // 连接中央气象台的API
            URL url = new URL("http://m.weather.com.cn/data/" + Cityid + ".html");
            URLConnection connectionData = url.openConnection();
            connectionData.setConnectTimeout(1000);
            // 得到1到6天的天气情况
            List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
            try {
                BufferedReader br = new BufferedReader(new InputStreamReader(
                        connectionData.getInputStream(), "UTF-8"));
                StringBuilder sb = new StringBuilder();
                String line = null;
                while ((line = br.readLine()) != null)
                    sb.append(line);
                String datas = sb.toString();
                System.out.println(datas);
                JSONObject jsonData = JSONObject.fromObject(datas);
                JSONObject info = jsonData.getJSONObject("weatherinfo");
                for (int i = 1; i <= 6; i++) {
                    // 得到未来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());// 发布时间
                    map.put("weather", info.getString("weather" + i).toString());// 天气
                    map.put("temp", info.getString("temp" + i).toString());// 温度
                    map.put("wind", info.getString("wind" + i).toString());// 风况
                    map.put("fl", info.getString("fl" + i).toString());// 风速
                    // map.put("index", info.getString("index").toString());//
                    // 今天的穿衣指数
                    // map.put("index_uv", info.getString("index_uv").toString());//
                    // 紫外指数
                    // map.put("index_tr", info.getString("index_tr").toString());//
                    // 旅游指数
                    // map.put("index_co", info.getString("index_co").toString());//
                    // 舒适指数
                    // map.put("index_cl", info.getString("index_cl").toString());//
                    // 晨练指数
                    // map.put("index_xc", info.getString("index_xc").toString());//
                    // 洗车指数
                    // map.put("index_d", info.getString("index_d").toString());//
                    // 天气详细穿衣指数
                    list.add(map);
                }
            } catch (SocketTimeoutException e) {
                System.out.println("连接超时");
                e.printStackTrace();
            } catch (FileNotFoundException e) {
                System.out.println("加载文件出错");
            }

            return list;

        }

        /**
         * 
         * 获取实时天气1<br>
         * 方 法 名： getTodayWeather <br>
         * 
         * @param Cityid
         *            城市编码
         */
        public static Map<String, Object> getTodayWeather1(String Cityid)
                throws IOException, NullPointerException {
            // 连接中央气象台的API
            URL url = new URL("http://www.weather.com.cn/data/sk/" + Cityid
                    + ".html");
            URLConnection connectionData = url.openConnection();
            connectionData.setConnectTimeout(1000);
            Map<String, Object> map = new HashMap<String, Object>();
            try {
                BufferedReader br = new BufferedReader(new InputStreamReader(
                        connectionData.getInputStream(), "UTF-8"));
                StringBuilder sb = new StringBuilder();
                String line = null;
                while ((line = br.readLine()) != null)
                    sb.append(line);
                String datas = sb.toString();
                System.out.println(datas);
                JSONObject jsonData = JSONObject.fromObject(datas);
                JSONObject info = jsonData.getJSONObject("weatherinfo");
                map.put("city", info.getString("city").toString());// 城市
                map.put("temp", info.getString("temp").toString());// 温度
                map.put("WD", info.getString("WD").toString());// 风向
                map.put("WS", info.getString("WS").toString());// 风速
                map.put("SD", info.getString("SD").toString());// 湿度
                map.put("time", info.getString("time").toString());// 发布时间

            } catch (SocketTimeoutException e) {
                System.out.println("连接超时");
                e.printStackTrace();
            } catch (FileNotFoundException e) {
                System.out.println("加载文件出错");
            }

            return map;

        }
        
        
        /**
         * 
         * 获取实时天气2<br>
         * 方 法 名： getTodayWeather <br>
         * 
         * @param Cityid
         *            城市编码
         */
        public static Map<String, Object> getTodayWeather2(String Cityid)
                throws IOException, NullPointerException {
            // 连接中央气象台的API
            URL url = new URL("http://www.weather.com.cn/data/cityinfo/" + Cityid
                    + ".html");
            URLConnection connectionData = url.openConnection();
            connectionData.setConnectTimeout(1000);
            Map<String, Object> map = new HashMap<String, Object>();
            try {
                BufferedReader br = new BufferedReader(new InputStreamReader(
                        connectionData.getInputStream(), "UTF-8"));
                StringBuilder sb = new StringBuilder();
                String line = null;
                while ((line = br.readLine()) != null)
                    sb.append(line);
                String datas = sb.toString();
                System.out.println(datas);
                JSONObject jsonData = JSONObject.fromObject(datas);
                JSONObject info = jsonData.getJSONObject("weatherinfo");
                map.put("city", info.getString("city").toString());// 城市
                map.put("temp1", info.getString("temp1").toString());// 最高温度
                map.put("temp2", info.getString("temp2").toString());// 最低温度
                map.put("weather", info.getString("weather").toString());//天气
                map.put("ptime", info.getString("ptime").toString());// 发布时间

            } catch (SocketTimeoutException e) {
                System.out.println("连接超时");
            } catch (FileNotFoundException e) {
                System.out.println("加载文件出错");
            }

            return map;

        }

        private static 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 {
                //测试获取实时天气1(包含风况，湿度)
                Map<String, Object> map = getTodayWeather1("101010100");
                System.out.println(map.get("city") + "	" + map.get("temp")
                        + "	" + map.get("WD") + "	" + map.get("WS")
                        + "	" + map.get("SD") + "	" + map.get("time"));
                
                //测试获取实时天气2(包含天气，温度范围)
                Map<String, Object> map2 = getTodayWeather2("101010100");
                System.out.println(map2.get("city") + "	" + map2.get("temp1")
                        + "	" + map2.get("temp2") + "	" + map2.get("weather")
                        + "	" + map2.get("ptime"));
                
                //测试获取一周天气
                List<Map<String, Object>> listData = getWeekWeatherMap("101010100");
                for (int j = 0; j < listData.size(); j++) {
                    Map<String, Object> wMap = listData.get(j);
                    System.out.println(wMap.get("city") + "	" + wMap.get("date_y")
                            + "	" + wMap.get("week") + "	" + wMap.get("weather")
                            + "	" + wMap.get("temp") + "	" + wMap.get("wind")
                            + "	" + wMap.get("fl"));
                }
                
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }