存放图片的核心代码

            try {               
                User u = new User();
                u.setName("小冥王");
                 File f = new File("D:"+File.separator+"m.jpg");
                    //获得照片文件的输入流
                InputStream input = new FileInputStream(f);
                byte[] b = new byte[input.available()];
                input.read(b);
                Blob blob = session.getLobHelper().createBlob(b);
                u.setImage(blob);
                session.save(u);

                tran.commit();

            } catch (FileNotFoundException e) {
                // TODO 自动生成的 catch 块
                e.printStackTrace();
            } catch (IOException e) {
                // TODO 自动生成的 catch 块
                e.printStackTrace();
            }        

读取到本地的核心代码：

        try {
            String hql ="from User where id = 1";
            Query q = session.createQuery(hql);
            User u = (User) q.list().get(0);
            System.out.println(u.getName());
            Blob blob = u.getImage();
            File file = new File("E:/test/m.jpg");
            InputStream is = blob.getBinaryStream();
            byte[] b = new byte[1024];
            OutputStream os = new FileOutputStream(file);
            while (is.read(b)!= -1) {
                os.write(b);                
            }
            os.close();
            is.close();
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        } catch (IOException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }