把Map转换成byte数组，使用 ByteArrayOutputStream 和 ObjectOutputStream
ByteArrayOutputStream stream = new ByteArrayOutputStream()
bmp.compress(Bitmap.CompressFormat.PNG， 100， stream)
byte[] byteArray = teArray()
public static byte[] getSerializedBytes(Map<String， Double> list) {undefined
if (null == list || () < 0)
return null
try {undefined
ByteArrayOutputStream bo = new ByteArrayOutputStream()
ObjectOutputStream os = new ObjectOutputStream(bo)
eObject(list)
return teArray()
} catch (IOException e) {undefined
return null
