Display bytea to image, jsp?

Can you help me convert a saved image to the database (bytea, in postgresql), to image and display it on a web page (jsp)?

I convert the image this way, and save on database:

    Part part = req.getPart("profilePic");

    byte[] prfilePic = new byte[(int) part.getSize()];
    InputStream stream = part.getInputStream();
    stream.read(prfilePic);
    stream.close();

But how can I convert from bytea to image again and display it?