public Order findById(Integer id) throws Exception {
		Order ord = null;
		String sql = "SELECT email,pid,count,flag FROM product_order WHERE oid=?";
		this.pstmt = this.conn.prepareStatement(sql);
		this.pstmt.setInt(1, id);
		ResultSet rs = this.pstmt.executeQuery();
		if (rs.next()) {
			ord = new Order();
			ord.setEmail(rs.getString(1));
			ord.setPid(rs.getInt(2));
			ord.setCount(rs.getInt(3));
			ord.setFlag(rs.getInt(4));
		}
		return ord;
	}