JAVA用post請求上傳二進制檔案

/**
   * 多檔案上傳的方法
   * 
   * @param actionUrl：上傳的路徑
   * @param uploadFilePaths：需要上傳的檔案路徑，數組
   * @return
   */
  @SuppressWarnings("finally")
  public static String uploadFile(String actionUrl, String[] uploadFilePaths) {
    String end = "\r\n";
    String twoHyphens = "--";
    String boundary = "*****";

    DataOutputStream ds = null;
    InputStream inputStream = null;
    InputStreamReader inputStreamReader = null;
    BufferedReader reader = null;
    StringBuffer resultBuffer = new StringBuffer();
    String tempLine = null;

     try {
      // 統一資源
       URL url = new URL(actionUrl);
      // 連接配接類的父類，抽象類
       URLConnection urlConnection = url.openConnection();
      // http的連接配接類
       HttpURLConnection httpURLConnection = (HttpURLConnection) urlConnection;
      // 設定是否從httpUrlConnection讀入，預設情況下是true;
       httpURLConnection.setDoInput(true);
      // 設定是否向httpUrlConnection輸出
       httpURLConnection.setDoOutput(true);
      // Post 請求不能使用緩存
       httpURLConnection.setUseCaches(false);
      // 設定請求的方法，預設是GET
       httpURLConnection.setRequestMethod("POST");
      // 設定字元編碼連接配接參數
       httpURLConnection.setRequestProperty("Connection", "Keep-Alive");
      // 設定字元編碼
       httpURLConnection.setRequestProperty("Charset", "UTF-8");
      // 設定請求内容類型
       httpURLConnection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);

      // 設定DataOutputStream
       ds = new DataOutputStream(httpURLConnection.getOutputStream());
       for (int i = 0; i < uploadFilePaths.length; i++) {
         String uploadFile = uploadFilePaths[i];
         String filename = uploadFile.substring(uploadFile.lastIndexOf("\\") + 1);
         ds.writeBytes(twoHyphens + boundary + end);
         ds.writeBytes("Content-Disposition: form-data; " + "name=\"file" + i + "\";filename=\"" + filename
             + "\"" + end);
         ds.writeBytes(end); 
         FileInputStream fStream = new FileInputStream(uploadFile);
         int bufferSize = 1024;
         byte[] buffer = new byte[bufferSize];
         int length = -1;
         while ((length = fStream.read(buffer)) != -1) {
           ds.write(buffer, 0, length);
         }
         ds.writeBytes(end);
         /* close streams */
         fStream.close();
       }
       ds.writeBytes(twoHyphens + boundary + twoHyphens + end);
       /* close streams */
       ds.flush();
       if (httpURLConnection.getResponseCode() >= 300) {
         throw new Exception(
             "HTTP Request is not success, Response code is " + httpURLConnection.getResponseCode());
       }
       if (httpURLConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
         inputStream = httpURLConnection.getInputStream();
         inputStreamReader = new InputStreamReader(inputStream);
         reader = new BufferedReader(inputStreamReader);
         tempLine = null;
         resultBuffer = new StringBuffer();
         while ((tempLine = reader.readLine()) != null) {
           resultBuffer.append(tempLine);
           resultBuffer.append("\n");
         }
       }
     }catch(Exception e) {
       e.printStackTrace();
     }finally {
       if (ds != null) {
         try {
           ds.close();
         } catch (IOException e) {
          // TODO Auto-generated catch block
           e.printStackTrace();
         }
       }
       if (reader != null) {
         try {
           reader.close();
         } catch (IOException e) {
          // TODO Auto-generated catch block
           e.printStackTrace();
         }
       }
       if (inputStreamReader != null) {
         try {
           inputStreamReader.close();
         } catch (IOException e) {
          // TODO Auto-generated catch block
           e.printStackTrace();
         }
       }
       if (inputStream != null) {
         try {
           inputStream.close();
         } catch (IOException e) {
          // TODO Auto-generated catch block
           e.printStackTrace();
         }
       }
       return resultBuffer.toString();
     }
  }      

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