private void updateProperty(String propertyFilePath, String propertyName, String propertyValue) {
		InputStream in = null;
		OutputStream out = null;
		try {
			in = new FileInputStream(propertyFilePath);
			Properties prop = new Properties();
			prop.load(in);
			out = new FileOutputStream(propertyFilePath);
			prop.setProperty(propertyName, propertyValue);
			prop.store(out, "Save");
		} catch (IOException e) {
		} finally {
			try {
				if (in != null) in.close();
				if (out != null) out.close();
			} catch (IOException e1) {
				e1.printStackTrace();
			}
		}
	}