Alternative to setBinaryStream

As of now,it seems that PreparedStatement.setBinaryStream is not
supported in PosrgreSQL-jdbc.But I sincerely need method similar to this
stream.
The reason is that in my servlet application jpg image is dynamically
displayed by <img
src=http://www.kasa.com/Image/servlet/ImageServlet?imgname=kasa.jpg>
tag.
Throughout this process,binary stream ,or getBinaryStream is used.
Therefore,image needs to be inserted into database by
PreparedStatement.setBinaryStream in advance.
One suggestions from mailing list is using ByteArrayInputStream:
That is ,ByteArrayInputStream bi=new ByteArrayInputStream(bytes);
ps.setBinaryInputStream(imgoid,bi,bytes.length);
To be sorry,the result is the same:InputStream as parameter not
supported;

Please tell me an alternative to setBinaryStream.

Thanks in advance.

Hiroshi Kasamatsu