Author: Chiyuan Chien

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import java.net.*;
import java.io.*;
 
public class OrderTicket {
  private static String url="http://railway.hinet.net/trw/ctno11.jsp?";
  public static void add(String attribute, String value) {
    if(url.endsWith("&") || url.endsWith("?")) {
      url+= attribute + "=" + value;
    }
    else {
      url+= "&" + attribute + "=" + value;
    }
  }
  public static void order() throws IOException {
    URL website = new URL(url);
    int count=1;
    while(true) {
      System.out.println("開始第" + count + "次嚐試訂票...");
      count++;
      URLConnection connection = website.openConnection();
      BufferedReader in = new BufferedReader(
                new InputStreamReader(connection.getInputStream()));
       String line=null;
       String content="";
       
       
       while( (line=in.readLine())!=null) {
         content+=line;
         System.out.print(".");
       }
       in.close();
       if(content.indexOf("您的車票已訂到")!=-1) {
         BufferedWriter bw = new BufferedWriter(new FileWriter("result.html"));
         bw.write(content);
         bw.close();
         System.out.println("票己成功訂到，請讀取result.html檔。");
         System.exit(0);
       }
 
       else {
         System.out.println("票尚未訂到，一分鐘之後將會再次嚐試...");
         try {
           Thread.sleep(6000); //sleep 1 minute, and try it again later.
           }catch(InterruptedException e) {
             e.printStackTrace();
           }
         }
 
      }//end while
    }
    public static void main(String[] args)  throws Exception{
 
            if (args.length != 1)
            {
                 // Print message, pause, then exit
                 System.err.println ("Invalid command parameters");
                 System.in.read();
                 System.exit(0);
            }
      BufferedReader filein = new BufferedReader(new FileReader(args[0] ));
      //BufferedReader filein = new BufferedReader(new FileReader("data.txt"));
      int i=0;
      String[] value = new String[10];
      String[] attribute = {"personId",//身分證字號
                  "fromStation",//_站代碼
                  "toStation",//到站代碼
                  "getinDate",//乘車日期
                  "orderQty",//訂票張數
                  "trainNo",//車次代碼
                  "returnTicket"//是否訂來回票
                  };
      while ((value[i] = filein.readLine()) != null) {
        add(attribute[i],value[i] );
        i++;
      }
      
      System.out.println(url);
      /*
      try {
        order();
      }
      catch(IOException e) {
        System.out.println("連線失敗，請檢查你的網路連線。");
      }
      */
      
    }
}