二进制数据读写

public static void binWriteTest() {
        int _int = 12345678;
        ByteBuffer _nbuffer = ByteBuffer.allocate(4);
        _nbuffer.order(ByteOrder.nativeOrder()); // 将新建的ByteBuffer设置为本机的字节顺
        _nbuffer.putInt(_int);
        _nbuffer.flip();

        try {
            FileOutputStream _fou = new FileOutputStream("test_dout.data");
            FileOutputStream _nfou = new FileOutputStream("test_nbuf.data");
            DataOutputStream _dou = new DataOutputStream(_fou);

            _dou.writeInt(_int);
            _dou.close();

            _nfou.write(_nbuffer.array());
            _nfou.close();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        System.out.println(ByteOrder.nativeOrder());

        _int = 789;
        String strteString = "abcdefghi>-1245:";
        float fval = 1234567.11f;
        try {
            FileOutputStream _nfou = new FileOutputStream(
                    Constant.DATADIR_STRING + "test_nbuf.data");
            DataOutputStream _dou = new DataOutputStream(_nfou);
            _dou.writeInt(_int);
            _dou.writeFloat(fval);
            _dou.writeUTF(strteString);
            ;
            _dou.close();
            FileInputStream _nfin = new FileInputStream(Constant.DATADIR_STRING
                    + "test_nbuf.data");
            DataInputStream _din = new DataInputStream(_nfin);

            _int = _din.readInt();
            fval = _din.readFloat();
            strteString = _din.readUTF();

            _din.close();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }