YII框架下用AJAX上传图片

1.控制器中的代码：

    /**
     * get ajax uploaded files.
     */
    public function actionGetAjax(){
        $model=new Attachment();//加载附件模型
        //读取图像上传域,并使用系统上传组件上传
        $tmpFile   = CUploadedFile::getInstanceByName('image');
        //读取上传配置文件,我的配置是/uploads
        $Directroy = Yii::app()->params['uploadPath'];
        //创建文件存放路径
        $y = date('Y');
        $m = date('m');
        $d = date('d');
        $Directroy = $Directroy."/";
        $pathd = $Directroy.$y."/".$m."/".$d."/";     
        //创建文件夹,此处一定要加上dirname(Yii::app()->BasePath)不然可能会出错;        
        Tool::makedir(dirname(Yii::app()->BasePath).$pathd); 
        if(is_object($tmpFile) && get_class($tmpFile)==='CUploadedFile'){
            $filename = time().rand(0,9);
            //上传文件的扩展名
            $ext = $tmpFile->extensionName;
            if($ext=='jpg'||$ext=='gif'||$ext=='png'){
                $big = $pathd . $filename . '_600.' . $ext; //310缩略图  
                $small  = $pathd . $filename . '_310.' . $ext; //310缩略图
                $thumb  = $pathd . $filename . '_100.' . $ext; //100缩略图    
                $model->zat_thumb = $thumb; //缩略图
            }    
            $uploadfile = $pathd . $filename . '.' . $ext;  //保存的路径
            $model->zat_url = $pathd . $filename . '.' . $ext;  //重新赋值             
            $model->zat_file_name = $filename . '.' . $ext;   //文件名称           
            $model->zat_title = $tmpFile->name;  //文件标题      
            $model->zat_file_type = $tmpFile->type;  //文件类型
            $model->zat_file_size = $tmpFile->size;  //文件大小
            $model->zat_image = 2;
            $model->zat_ip = Yii::app()->request->userHostAddress; //上传IP
            //print_r($uploadfile);            
        }

        if($model->save()){
            //保存到服务器
            $tmpFile->saveAs(dirname(Yii::app()->BasePath).$uploadfile);
            if($ext=='jpg'||$ext=='gif'||$ext=='png'){      
                //使用image-Kohana图像处理库扩展
                $img = Yii::app()->image->load(dirname(Yii::app()->BasePath).$uploadfile); 
                $img->resize(600,600)->quality(85);
                $img->save(dirname(Yii::app()->BasePath).$big);//生成600缩略图
                $img->resize(310,310)->quality(85);
                $img->save(dirname(Yii::app()->BasePath).$small);//生成310缩略图
                $img->resize(100,100)->quality(85);
                $img->save(dirname(Yii::app()->BasePath).$thumb);//生成100缩略图               
            } 
            if($ext=='jpg'||$ext=='gif'||$ext=='png'){            
                $str = json_encode(
                    array(
                        'upfile'=>array(
                            'zat_id' => Yii::app()->db->getLastInsertID(), //取插ID
                            'file' => $uploadfile,//原图
                            'small' => $small,//310缩略图
                            'thumb' => $thumb,//100缩略图           
                        )
                    )
                );
            }else{
                $str = json_encode(
                    array(
                        'upfile'=>array(
                            'zat_id' => Yii::app()->db->getLastInsertID(),
                            'file' => $uploadfile,                           
                        )
                    )
                );
            }
            echo $str;
        }

    }

2.视图中的代码：

3.js代码：

相关js文件的下载地址：
jquery.ui.widget.js
jquery.iframe-transport.js
jquery.fileupload.js