public void a(){
  try {
   InputStreamReader in = new InputStreamReader(new FileInputStream(new File("d:\\a.txt")),"GBK");
   char cbuf[] = new char[10];
   in.read(cbuf);
   byte b[] = String.valueOf(cbuf).getBytes("UTF-8");
   System.out.println(new String(b,"UTF-8"));
  } catch (FileNotFoundException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }