File f = new File(path);
  FileReader fr = new FileReader(f);
  BufferedReader br = new BufferedReader(fr);
  String s;
  try
  {
   s = br.readLine();
   while (s != null)
   {
    s += s;
    text.setText(new String(s));
    System.out.println(s);    
    s = br.readLine();//这行怎么读取不到内容？？？
   }
   //text.setText(new String(s));
  } catch (IOException e)
  {
   System.out.println("打开出错");
  } finally