private ZHConverter(String propertyFile) {
		InputStream is =getClass().getResourceAsStream(propertyFile);
		if (is != null) {
			BufferedReader reader = null;
			try {
				reader = new BufferedReader(new InputStreamReader(is));
				charMap.load(reader);
			} catch (FileNotFoundException e) {
			} catch (IOException e) {
				e.printStackTrace();
			} finally {
				try {
					if (reader != null)
						reader.close();
					if (is != null)
						is.close();
				} catch (IOException e) {
				}
			}
		}
		initializeHelper();
	}