从数据库读取图片的有关问题

            File file = new File("image/temp.jpg");            if(file.exists()){           file.delete();           file.createNewFile();        }else{            file.createNewFile();        }             InputStream in = rs.getBinaryStream(5); //rs是连接数据库返回的ResultSet对象            FileOutputStream out = new FileOutputStream("image/temp.jpg");            byte[] bytes = new byte[1024];            int n;//将读取的文件写入到out流中            while ((n = in.read(bytes)) != -1) {                out.write(bytes, 0, n);            }            in.close();            out.close();            ImageIcon icon = new ImageIcon("image/temp.jpg");                        JFrame frame = new JFrame(); JPanel panel = new JPanel();            frame.getContentPane().add(panel);            frame.getContentPane().setLayout(null); panel.setSize(400,400);            frame.setSize(400,400); panel.add(new JLabel(icon));            frame.setVisible(true);