Android HTTPpost和get請求

/**   * 發送Post請求   *    * @param path   *            請求路徑   * @param params   *            請求參數   * @param encoding   *            編碼   * @return 服務器返回流   */  public static InputStream sendPOSTRequest(String url,    Map<String, String> params, String encoding) throws Exception {   StringBuilder data = new StringBuilder();   if (params != null && !params.isEmpty()) {    for (Map.Entry<String, String> entry : params.entrySet()) {     data.append(entry.getKey()).append("=");     data.append(URLEncoder.encode(entry.getValue(), encoding));     data.append("&");    }    data.deleteCharAt(data.length() - 1);   }   byte[] entity = data.toString().getBytes();// 生成實體數據   HttpURLConnection conn = (HttpURLConnection) new URL(url)     .openConnection();   conn.setConnectTimeout(5000);   conn.setRequestMethod("POST");   conn.setDoOutput(true);// 允許對外輸出數據   conn.setRequestProperty("Content-Type",     "application/x-www-form-urlencoded");   conn.setRequestProperty("Content-Length", String.valueOf(entity.length));   OutputStream outStream = conn.getOutputStream();   outStream.write(entity);   if (conn.getResponseCode() == 200) {    return conn.getInputStream();   }   return null;  }    /**   * 發送get請求的方法   * @param url   * @param params   * @param encoding   * @return   * @throws Exception   */  public static InputStream sendGETRuqest(String url,    Map<String, String> params, String encoding) throws Exception {   // StringBuilder是用來組拼請求地址和參數     StringBuilder sb = new StringBuilder();     sb.append(url).append("?");     if (params != null && params.size() != 0) {      for (Map.Entry<String, String> entry : params.entrySet()) {       // 如果請求參數中有中文，需要進行URLEncoder編碼     sb.append(entry.getKey()).append("=")       .append(URLEncoder.encode(entry.getValue(), encoding));       sb.append("&");    }      sb.deleteCharAt(sb.length() - 1);     }     HttpURLConnection conn = (HttpURLConnection) new URL(sb.toString())     .openConnection();     conn.setConnectTimeout(5000);     conn.setRequestMethod("GET");     if (conn.getResponseCode() == 200) {      return conn.getInputStream();     }     return null;  }