Загрузка GWT Мануэлем Карраско Муньино Выпуск - PullRequest
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Загрузка GWT Мануэлем Карраско Муньино Выпуск

1 голос
/ 04 декабря 2010

Я использую эту систему загрузки gwt здесь (http://code.google.com/p/gwtupload/). У меня проблемы с ней.

  1. Показать, чтобы кормить его путем от клиента
  2. Получить путь на сервере, где был сохранен файл
  3. установить путь на сервере, где должен быть сохранен файл

Этот сервлет для обработки загрузки файлов 

public class SampleUploadServlet extends UploadAction {

  private static final long serialVersionUID = 1L;

  Hashtable<String, String> receivedContentTypes = new Hashtable<String, String>();
  /**
   * Maintain a list with received files and their content types. 
   */
  Hashtable<String, File> receivedFiles = new Hashtable<String, File>();

  /**
   * Override executeAction to save the received files in a custom place
   * and delete this items from session.  
   */
  @Override
  public String executeAction(HttpServletRequest request, List<FileItem> sessionFiles) throws UploadActionException {
    String response = "";
    int cont = 0;
    for (FileItem item : sessionFiles) {
      if (false == item.isFormField()) {
        cont ++;
        try {
          /// Create a new file based on the remote file name in the client
          // String saveName = item.getName().replaceAll("[\\\\/><\\|\\s\"'{}()\\[\\]]+", "_");
          // File file =new File("/tmp/" + saveName);

          /// Create a temporary file placed in /tmp (only works in unix)
          // File file = File.createTempFile("upload-", ".bin", new File("/tmp"));

          /// Create a temporary file placed in the default system temp folder
          File file = File.createTempFile("upload-", ".bin");
          item.write(file);

          /// Save a list with the received files
          receivedFiles.put(item.getFieldName(), file);
          receivedContentTypes.put(item.getFieldName(), item.getContentType());

          /// Compose a xml message with the full file information which can be parsed in client side
          response += "<file-" + cont + "-field>" + item.getFieldName() + "</file-" + cont + "-field>\n";
          response += "<file-" + cont + "-name>" + item.getName() + "</file-" + cont + "-name>\n";
          response += "<file-" + cont + "-size>" + item.getSize() + "</file-" + cont + "-size>\n";
          response += "<file-" + cont + "-type>" + item.getContentType()+ "</file-" + cont + "type>\n";
        } catch (Exception e) {
          throw new UploadActionException(e);
        }
      }
    }

    /// Remove files from session because we have a copy of them
    removeSessionFileItems(request);

    /// Send information of the received files to the client.
    return "<response>\n" + response + "</response>\n";
  }

  /**
   * Get the content of an uploaded file.
   */
  @Override
  public void getUploadedFile(HttpServletRequest request, HttpServletResponse response) throws IOException {
    String fieldName = request.getParameter(PARAM_SHOW);
    File f = receivedFiles.get(fieldName);
    if (f != null) {
      response.setContentType(receivedContentTypes.get(fieldName));
      FileInputStream is = new FileInputStream(f);
      copyFromInputStreamToOutputStream(is, response.getOutputStream());
    } else {
      renderXmlResponse(request, response, ERROR_ITEM_NOT_FOUND);
   }
  }

  /**
   * Remove a file when the user sends a delete request.
   */
  @Override
  public void removeItem(HttpServletRequest request, String fieldName)  throws UploadActionException {
    File file = receivedFiles.get(fieldName);
    receivedFiles.remove(fieldName);
    receivedContentTypes.remove(fieldName);
    if (file != null) {
      file.delete();
    }
  }
}

Спасибо

1 Ответ

0 голосов
/ 03 февраля 2011

Попробуйте с этим: 

public String executeAction(HttpServletRequest request, List<FileItem> sessionFiles) throws UploadActionException {
for (FileItem item : sessionFiles) {
    if (false == item.isFormField()) {
        String uploadedFileName = "";
        try {
            String uploadsDir = "/uploads";
            File dirFile = new File(uploadsDir);
                dirFile.mkdirs();

                String filename = FilenameUtils.getName(item.getName()); // uploaded file filename

            File file = new File(uploadsDir, filename);
            item.write(file);

            uploadedFileName = uploadsDir + "/" + filename;
        } catch (Exception e) {
            logger.error("ERROR UPLOADING FILE: " + uploadedFileName +  ", Exception: " + e);
            throw new UploadActionException(e.getMessage());
        }
    }
removeSessionFileItems(request);

} return null;}

Удачного кодирования!

С уважением.

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