图片，文件流的简单使用
public void getBlob() throws Exception {
      OutputStream os = null;
      InputStream is = null;
      ResultSet rs = null;
      try {

//       rs = this.query("select FACEFILE from t_wepec_user where sysid='4784' ");
         is = new FileInputStream("D:\\img\\yy.jpg");
//       while (rs.next()){
//          is = rs.getBinaryStream(1);
//          Blob blob = rs.getBlob(1);
//          is = blob.getBinaryStream();
            OutputStream out = new FileOutputStream("D:\\img\\narcissus1.jpg");
            byte[] buffer = new byte[1024];
            int i = 0;
            while((i = is.read(buffer)) != -1){
               out.write(buffer, 0, i);
            }
//       }

//       List<Map> list = this.queryBySql("select FACEFILE from t_wepec_user where sysid='881108302' ", 0, 1).getList();
//        list.get(0).get("facefile");
//           logger.info("sysid ==============="+sf);
      } catch (Exception e) {
         e.printStackTrace();
      }finally {
         try {
            is.close();
            os.close();
            rs.close();
         } catch (IOException e) {
            e.printStackTrace();
         } catch (SQLException e) {
            e.printStackTrace();
         }
//       ps.close();
      }
   }