public boolean closeFile() {
		if (fwFile == null)
			return false;
		else {
			try {
				fwFile.flush();
				fwFile.close();
				// System.out.println("ļرճɹ");
			} catch (IOException e) {
				// TODO Auto-generated catch block
				System.out.println("ļرʧܣ");
				e.printStackTrace();
				return false;
			}
			return true;
		}
	}