How to persist LARGE BLOBs (>100MB) in Oracle using Hibernate

I was having the same problems as you in attempting to map using “blob” type. Here is a link to a post I made on the hibernate site: https://forum.hibernate.org/viewtopic.php?p=2452481#p2452481

Hibernate 3.6.9
Oracle Driver 11.2.0.2.0
Oracle Database 11.2.0.2.0

To fix the problem I used code that had a custom UserType for the Blob, I had the return type be java.sql.Blob.

Here are the key method implementations of this UserType:

public Object nullSafeGet(ResultSet rs, String[] names, Object owner) throws HibernateException, SQLException {

   Blob blob = rs.getBlob(names[0]);
   if (blob == null)
      return null;

   return blob;
}

public void nullSafeSet(PreparedStatement st, Object value, int index)
     throws HibernateException, SQLException {
   if (value == null) {
      st.setNull(index, sqlTypes()[0]);
   }
   else {
      InputStream in = null;
      OutputStream out = null;
      // oracle.sql.BLOB
      BLOB tempBlob = BLOB.createTemporary(st.getConnection(), true, BLOB.DURATION_SESSION);
      tempBlob.open(BLOB.MODE_READWRITE);
      out = tempBlob.getBinaryOutputStream();
      Blob valueAsBlob = (Blob) value;
      in = valueAsBlob.getBinaryStream();
      StreamUtil.toOutput(in, out);
      out.flush();
      StreamUtil.close(out);
      tempBlob.close();
      st.setBlob(index, tempBlob);
      StreamUtil.close(in);
   }
}