/**
  * 将文件写入到有磁盘中。。
  * @param name 图片名称
  * @param file 将图片写入的路径
  */
 public void readImage(String name,File file){
    String sql = null;
    FileOutputStream sout = null;
    InputStream in = null;
    PreparedStatement ps = null;
    ResultSet rs = null;
    Connection jdbcCon = new JDBCFactory().getConnection();
   sql="select content from uploadfile where name='"+name+"'";
        try {
    ps = jdbcCon.prepareStatement(sql);
      rs = ps.executeQuery();
      if (rs.next()) {
        //文件输出流
        in = rs.getBinaryStream(1);
        sout = new FileOutputStream(file);
        byte b[] = new byte[0x7a120];
        while (in.read(b) != -1) {
          sout.write(b);
          //将缓冲区的输入输出到页面
          in.read(b);
        }
        sout.flush();
        sout.close();
      }
   } catch (Exception e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
   
 }