try
        {
            String fileName = "D:\\text.txt"; //文件名
            FileInputStream in = new FileInputStream(new File(fileName));
            //当文件没有结束时每次读取一个字节显示
            while (in.available()>0)
            {
                System.out.print((char)in.read());
            }
            in.close();
        }
        catch (IOException e)
        {
            System.out.println(e.toString());
        }