public function out_html($code)
{
        $data['articles'] = $datalist;
        
        $this->load->helper('file');
        $this->load->view('article',$data);
        $html_data = $this->output->get_output();
        //根据规则生成目录
        $path = '/usr/share/nginx/htdocs/static/www.test.com/'.
               substr($code,0,2).'/'.substr($code,2,3);
        //目录不存在时创建
        if (!is_dir($path)){
            mkdir($path,0755,true);
        }
        $file_path = $path.'/'.$code.'.html';
        if(write_file($file_path,$html_data)){
            echo "success";
        }else{
            echo "error";
        }
}