怎样实现分页.解决方法

public ArrayList<User> select(String sql){                    ArrayList<User> list = new ArrayList<User>();        Connection conn = null;        Statement stmt = null;        ResultSet rs = null;        try {            conn = getConnection();            stmt = conn.createStatement();            rs = stmt.executeQuery(sql);            while(rs.next()){                       //将rs结果集中的每一条记录都转化成User对象,再放进list中                User user = new User();                    user.setTel(rs.getString("tel"));                user.setUsername(rs.getString("username"));                user.setAddr(rs.getString("addr"));                user.setMail(rs.getString("mail"));                user.setType(rs.getInt("type"));                user.setYf(rs.getDouble("yf"));                user.setNum(rs.getInt("num"));                user.setYb(rs.getInt("yb"));                user.setFp(rs.getInt("fp"));                    user.setPrice(rs.getDouble("price"));                user.setNum(rs.getInt("num"));                user.setId(rs.getString("id"));                                        user.setFk(rs.getInt("fk"));                    list.add(user);            }        } catch (SQLException e) {            System.out.println("Sql异常1");        }        finally{            if(rs!=null){                try {                    rs.close();                } catch (SQLException e) {                    System.out.println("关闭rs时异常");                }            }            if(stmt!=null){                try {                    stmt.close();                } catch (SQLException e) {                    System.out.println("关闭stmt时异常");                }            }            if(conn!=null){                try {                    conn.close();                } catch (SQLException e) {                    System.out.println("关闭conn时异常");                }            }        }        return list;    }

<%                     UsersDAO db = new UsersDAO();         String sql="select *from ZTC";         ArrayList<User> list = db.select(sql);          if(list.isEmpty()==false)         {            for(int i=0;i<list.size();i++)                        {                 User user = list.get(i);      %>                 <tr>                 <td><%=user.getId()%></td>                 <td><%=user.getUsername()%></td>                 <td><%=user.getTel()%></td>                 <td><%=user.getAddr()%></td>                 <td><%=user.getMail()%></td>                 <td><%=user.getType()%></td>                   <td><%=user.getNum()%></td>                 <td><%=user.getYb()%></td>                 <td><%=user.getYf()%></td>                 <td><%=user.getFp()%></td>                 <td><%=user.getPrice()%></td>                   <td><%=user.getFk()%></td>                         <td>