byte类型与double类型的互相转化

byte类型转化成double类型

	public static double convert(byte[] data) throws IOException {
		DataInputStream dis = new DataInputStream(new ByteArrayInputStream(data));
		double num = dis.readDouble();
		dis.close();
		return num;
	}

double类型转化成byte类型

	public static byte[] convert(double num) throws IOException {
		byte[] data = null;
		ByteArrayOutputStream bos = new ByteArrayOutputStream();
		DataOutputStream dos = new DataOutputStream(bos);
		dos.writeDouble(num);
		dos.flush();
		data = bos.toByteArray();
		dos.close();
		return data;
	}