class Page {
     private $total;                   //数据表中总记录数    private $listRows;                    //每页显示行数    private $limit;                   //SQL语句使用limit从句,限制获取记录个数    private $uri;                     //自动获取url的请求地址    private $pageNum;                 //总页数    private $page;                   //当前页     private $config = array(          'head' => "条记录",          'prev' => "上一页",          'next' => "下一页",          'first'=> "首页",          'last' => "末页"       );