try {
  java.sql.Blob blob = oracle.sql.BLOB.createTemporary(
connection, false, oracle.sql.BLOB.DURATION_SESSION);
  OutputStream os = blob.setBinaryStream(1);
  os.write(arrayDeBytes);
     String sql = "insert into taula (imatge) values (?)";
  PreparedStatement stmt = con.prepareStatement(sql);
  stmt.setBlob(1, blob);
  stmt.execute();
} finally {
  blob.free();
}‪