code: protected void writeToFile(String ret) {
  		File dir = new File(dataDictionaryOutputDir);
  		if (!dir.exists()) {
  			dir.mkdirs();
  		}
  		
  		String target = dataDictionaryOutputDir + File.separator + dataDictionaryFileName;
  		OutputStreamWriter osw = null;
  		try {
  			osw = new OutputStreamWriter(new FileOutputStream(target), "UTF-8");
  			osw.write(ret);
  		}
  		catch (IOException e) {
  			throw new RuntimeException(e);
  		}
  		finally {
  			if (osw != null) {
  				try {osw.close();} catch (IOException e) {LogKit.error(e.getMessage(), e);}
  			}
  		}
  	}
docs: _DataDictionary.txt 覆盖写入