在java中将对象集合为字节格式，然后反之亦然

I have a collection of objects which i need to store in byte format and then afterwards i have to convert the data which in bytes back into collection of objects.I need the answer in java. For eg I have an array of objects(any type) then i have to convert this array to byte array in java and then vice versa.I have a collection of objects which i need to