Hi Dr. Sun,

When I try to save the bytes into database, I don't see anything in database. The field is blank. But when I try to print out that field it shows me "[B@5575b2b5". Does this means the images bytes are saving into database?

Most characters are not displayable so you can't see the value of the column (assume you are using bytea) when you do "select * from ...". You can write some code to read it from the database then write it to a file and see if it's the image you uploaded.

If you use LOB, the column should show a number, which is the OID of the large object. In psql you can use the "\lo_export" command to export the lob to a file to see if it's the uploaded image.