java抓取12306信息实现火车余票查询示例

public static List<NewTrain> getmsg(String startCity,String endCity,int isAdult) throws Exception{

        List<NewTrain> trains = new ArrayList<NewTrain>();

        String sstartCity = CityCode.format(startCity);
        String sendCity = CityCode.format(endCity);

        TrustManager[] tm = {new MyX509TrustManager()};
        SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE"); 
        sslContext.init(null, tm, new java.security.SecureRandom()); 
        // 从上述SSLContext对象中得到SSLSocketFactory对象 
        SSLSocketFactory ssf = sslContext.getSocketFactory();
        String type = "ADULT";
        if(isAdult == 1){
            type = "0X00";
        }

    String urlStr = "https://kyfw.12306.cn/otn/lcxxcx/query?purpose_codes="+type+"&queryDate=2014-04-27&from_station="+sstartCity+"&to_station="+sendCity;

    URL url = new URL(urlStr);

    HttpsURLConnection con = (HttpsURLConnection) url.openConnection();
    con.setSSLSocketFactory(ssf);

    InputStreamReader in = new InputStreamReader(con.getInputStream(),"utf-8");

    BufferedReader bfreader = new BufferedReader(in);

    StringBuffer sb = new StringBuffer();

    String line = "";

    while ((line = bfreader.readLine()) != null) {
        sb.append(line);
    }
    System.out.println(sb.toString());
}

public class NewTrain {

    private String to_station_name;    //到达地

    private String station_train_code;  //火车编号

    private String from_station_name;  //出发地

    private String start_time;   //出发时间 

    private String arrive_time;  // 到达时间

    private String lishi;  //  需要时间

    private String zy_num;  //   一等座数量

    private String ze_num;  //  二等座数量

    private String swz_num;  //   商务座数量

    private String gr_num;  //   高级软卧数量

    private String rw_num;  //  软卧数量

    private String rz_num;  //   软座数量

     private String yw_num;  //   硬卧数量

    private String yz_num;  //   硬座数量

    private String tz_num;  //   特等座数量

    private String wz_num;   //   无座数量
}