前端VUE调用接口下载execl出现乱码打不开的问题

原因有2：

第一引用mock导致，

第二下载时需要设置请求 responseType: 'blob'

下载代码如下：

export async function DownLoadFile(params) {
    return request(File_DownLoad,METHOD.GET, params,{responseType: 'blob'})
  }

download: function (fileId, fileName) {
   console.log("++++" + fileId);
   var reqcondition = { file_Id: fileId };
   DownLoadFile(reqcondition).then((res) => {
     console.log(res);
     console.log(fileName);
     this.Pagedownload(res.data, fileName);
   });
 },

Pagedownload(data, fileName) {
     if (!data) {
       return;
     }
     let url = window.URL.createObjectURL(new Blob([data]));
     let link = document.createElement("a");
     link.style.display = "none";
     link.href = url;
     link.setAttribute("download", fileName);
     document.body.appendChild(link);
     link.click();
   },