try {            // 方法一            BufferedReader br = new BufferedReader(new FileReader(new File(                    "D:\1.xls")));            // StringBuilder bd = new StringBuilder();            StringBuffer bd = new StringBuffer();            while (true) {                String str = br.readLine();                if (str == null) {                    break;                }                System.out.println(str);                bd.append(str);            }            br.close();            // System.out.println(bd.toString());            // 方法二            InputStream is = new FileInputStream(new File("d:\1.xls"));            byte b[] = new byte[Integer.parseInt(new File("d:\1.xls").length()                    + "")];            is.read(b);            System.out.write(b);            System.out.println();            is.close();            // 方法三            Reader r = new FileReader(new File("d:\1.xls"));            char c[] = new char[(int) new File("d:\1.xls").length()];            r.read(c);            String str = new String(c);            System.out.print(str);            r.close();        } catch (RuntimeException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (FileNotFoundException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }