i saw my husband dead body and i knew that he is no more but as i enter the door of the room where his body was lying he gets up looking and smiling at me ladies sitting around around his body also get up in surprise and my husband comes to me and hugs me and somewhat these kind of dreams i have seen 5 to 6 times that my husband comes back to life whenever i feel sad or need him.

First, I want to say sorry for your loss. I think your dreams have a dual purpose. By missing him and needing to see him, you are allowed to in the dreams. From a symbolic standpoint, I also see it this way: Your husband represents an action or behavior that you were committed to. Death means change. Based on the symbols, the dream shows that you had changed or stopped a previous commitment. This activity however, is 'reappearing' or presenting itself from time to time.
Sometimes after such a loss we stop doing the things we love due to sadness that comes. Look over your life and see what activities you may have stopped. See how the opportunity to 'revisit' this activity comes to you.
I hope this helps in some way.