Java HttpURLConnection發佈方法不起作用

我正在使用HttpURLConnection通過POST將數據發送到服務器。我設置了標題，然後獲取輸出流並寫入一些字節，然後關閉輸出流。Java HttpURLConnection發佈方法不起作用

我想從給定的網址獲取下一頁計劃詳情。但一些我沒有得到結果。如果您知道此代碼中的任何問題，請幫助任何人。

我得到第一頁錯誤，而不是第二頁。 「您選擇的車站組合無效，請致電（718）217-5477聯繫LIRR旅遊信息中心，並索取代表以獲取更多信息。」

 public static void main(String[] args) throws Exception { 
     String url = "http://lirr42.mta.info"; 
     String cookie = retrieveCookies(url); 
     String urlParameters = "FromStation=56&ToStation=8&RequestDate=08/24/2013&RequestTime=01:00&RequestAMPM=PM&sortBy=1&schedules=schedules"; 
     String page = postHttpPage(url + "/index.php", urlParameters, cookie); 
     System.out.println(page); 
     System.out.println(); 
    } 

    public static String postHttpPage(String url, String urlParameters, String cookie) throws Exception { 
     System.out.println("\nSending 'POST' request to URL : " + url); 
     URL obj = new URL(url); 
     HttpURLConnection conn = (HttpURLConnection) obj.openConnection(); 
     return postPage(conn, urlParameters, cookie); 
    } 

    private static String postPage(HttpURLConnection conn, String urlParameters, String cookie) throws Exception { 
     conn.setRequestMethod("POST"); 
     conn.setRequestProperty("User-Agent", "User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.57 Safari/537.36"); 
     conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); 
     conn.setRequestProperty("Content-Length", String.valueOf(urlParameters.getBytes().length)); 
     conn.setRequestProperty("Content-Language", "en-US"); 
     conn.setRequestProperty("Cookie", cookie); 
     //conn.setInstanceFollowRedirects(true); 
     // Send post request 
     //conn.setDoInput(true); 
     conn.setDoOutput(true); 
     DataOutputStream wr = new DataOutputStream(conn.getOutputStream()); 
     wr.writeBytes(urlParameters); 
     //System.out.println("wr : " + wr.size()); 
     wr.flush(); 
     wr.close(); 

     StringBuffer response = new StringBuffer(); 
     int responseCode = conn.getResponseCode(); 
     System.out.println("Post parameters : " + urlParameters); 
     System.out.println("Response Code : " + responseCode); 

     BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream())); 
     String inputLine; 

     while ((inputLine = in.readLine()) != null) { 
      response.append(inputLine); 
     } 
     in.close(); 

     return response.toString(); 
    } 

    public static String retrieveCookies(String url) throws IOException{ 
     URL obj = new URL(url); 
     HttpURLConnection conn = (HttpURLConnection) obj.openConnection(); 
     String cookies=conn.getHeaderField("Set-Cookie"); 
     System.out.print("cookies: " + cookies); 
     conn.disconnect(); 
     return cookies; 
    }

來源

2013-08-24 user2589193

你會得到什麼結果？你應該發佈。 – BlackHatSamurai

我得到第一頁錯誤，而不是第二頁。 **「您選擇的車站組合無效，請致電（718）217-5477聯繫LIRR旅遊信息中心，並索取代表以獲取更多信息。」** – user2589193