e con quest altro recupero e salvo in un nuovo file.

codice:
PreparedStatement pstmt = conn.prepareStatement("SELECT * FROM IMAGES WHERE ID=1");
      ResultSet rs = pstmt.executeQuery();
      
      while (rs.next()) {
        OutputStream fos = new java.io.FileOutputStream(new File("new_" +
            rs.getString("name")));
        InputStream fin = rs.getBinaryStream("img");
        byte[] b = new byte[fin.available()];
        fin.read(b);
        fos.write(b);
        fos.flush();
        fos.close();
      }