thinkphp实现数据分页

方法一：

 public function show_cate(){

         $category_name = array(
             '1' => '政法综治前沿',
             '2' => '政策法规',
             '3' => '平安建设',
             '4' => '通知公告',
             '5' => '理论研讨',
             '6' => '本地动态',
             '7' => '队伍建设',
             );
         $category_id = I('get.category_id');
         $model = M('zx_article');
                                  //计算要显示的总数据条数
         $count = $model->where('category_id ='.$category_id)->order('article_id desc')->count();
                                 //实例化Page类，传入总条数和每页要显示的条数
         $page = new \Think\Page($count,2);
                               //使用limit函数指定查询和操作的数量
         $data = $model->where('category_id ='.$category_id)->order('article_id desc')->limit($page->firstRow.','.$page->listRows)->select();
                                 //传数据给模板
         $this->assign('data',$data);
                                //调用Page类的show()函数
         $this->assign('page',$page->show());
         $this->assign('name',$category_name[$category_id]);
         $this->display();
     }