<!-- 这里是点击下载的html代码，隐藏域是当前的id -->

<p><input type="hidden" value="{$vo.file_id}" class="file_id"><a href="#" class="btn btn-primary click">点击下载</a></p>

<script type="">

    //触发ajax把id传到控制器

    $('.click').click(function(){

        id = $(this).prev().val();

         $.ajax({

            type: "POST",

            url: "{:url('home/Single/ajax')}",

            data: {id:id},

            dataType: "json",

            success: function (msg) {

              window.open(msg.html)//新页面打开预览

            }

          });

         return false;

    })

</script>

//首先头部引用类

use PhpOffice\PhpWord\IOFactory;

use PhpOffice\PhpWord\PhpWord;

public function ajax(){

        //根据id查询数据库存的文档路径

        $file_id = $_POST['id'];

        $info = M('download_file')->where(['file_id'=>$file_id])->find();

        $IOFactory = new PhpWord();

        $phpWord = \PhpOffice\PhpWord\IOFactory::load('./'.$info['file_url']);

        $xmlWriter = \PhpOffice\PhpWord\IOFactory::createWriter($phpWord, "HTML");

        //生成hello.html文件路径

        $xmlWriter->save('./Public/doc/hello.html');

        //判断文件是否存在，额庵后传到前台

        if(file_exists('./Public/doc/hello.html')){

            $html='/Public/doc/hello.html';

            $dataa = array('html'=>$html,'url'=>$url);

            echo json_encode($dataa);

        }else{

            $dataa = array('html'=>'0');

            echo json_encode($dataa);

        }

    }