把后端传过来的文件流变成 url

res就是后端给的文件流

        let url = window.URL.createObjectURL(
            new Blob([res], {
                type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8",
            })
        );
        console.log('url', url)
    })

接口写法

   download: () => http.request({
            url: `aeroelasticity/file/download/${data.projectId}/${data.type}`,
            method: 'post',
            data: data.fileLocal,
            responseType: "blob"
        }),