java HttpClient PostʵÀý

private void postMethod(String url) throws IOException
 {    
  url = "http://www.newsmth.net/bbslogin2.php";
  PostMethod postMethod = new PostMethod(url);
  // ÌîÈë¸÷¸ö±íµ¥ÓòµÄÖµ
  NameValuePair[] data = { new NameValuePair("id", "herrapfel"),new NameValuePair("passwd", "") };
  // ½«±íµ¥µÄÖµ·ÅÈëpostMethodÖÐ
  postMethod.setRequestBody(data);
  // Ö´ÐÐpostMethod
  int statusCode = httpClient.executeMethod(postMethod);
  System.out.println(" status code:" + statusCode);
  // HttpClient¶ÔÓÚÒªÇó½ÓÊܺó¼Ì·þÎñµÄÇëÇó£¬ÏóPOSTºÍPUTµÈ²»ÄÜ×Ô¶¯´¦Àíת·¢
 
if(statusCode == HttpStatus.SC_OK)
  {
   StringBuffer contentBuffer = new StringBuffer();
   InputStream in = postMethod.getResponseBodyAsStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(in,postMethod.getResponseCharSet()));
            String inputLine = null;
            while((inputLine = reader.readLine()) != null)
            {
             contentBuffer.append(inputLine);
             System.out.println("input line:"+ inputLine);
             contentBuffer.append("/n");
            }
            in.close();
  }
  else if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY || statusCode == HttpStatus.SC_MOVED_TEMPORARILY)
  {
      // ´