GoodsController.class.php控制器页面
<?php

      namespace Admin\Controller;

      use Think\Controller;

      class GoodsController extends Controller{

           public function  tianjia(){

             $goods=D('Goods');

             if(!empty($_POST)){

                 if($_FILES['f_goods_image']['error']<){

                    $cfg=array(

                   'rootPath' =>  './Public/uploadss/',

                               );//保存根路径

                     $up=new \Think\Upload($cfg);

                     $z= $up->uploadOne($_FILES['f_goods_image']);

                    //  dump($up->getError());

                    //dump($z);

                    //把上传好的附件上传到数据库里面

                    $_POST['goods_big_img']=  $up->rootPath .$z['savepath'].$z['savename'];

                 }

                 //收集表单

                 $shuju=$goods->create();

                 $z=$goods->add($shuju);

                 if($z){

                     $this->redirect('showlist',, '添加商品成功');

                 }  else {

                     $this->redirect('tianjia',,'添加商品失败');

                 }

             }  else {

                 //展示表单

                     $this->display();

             }

         }

}