通过blob请求后端导出文件

后端controller

 @PostMapping("/exportPlanProject2")
    public void exportActive(@RequestBody USER user, HttpServletResponse httpServletResponse) throws IOException {}

后端service

    public void exportExcel2(HttpServletResponse response) throws IOException {
        OutputStream out = response.getOutputStream();
        try {
            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
            response.setCharacterEncoding(Charsets.UTF_8.name());
            String fileName = "首页导出";
            fileName = URLEncoder.encode(fileName, "UTF-8").replaceAll("\\+", "%20");
            response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");
            wb.write(out);
        } catch (Exception e) {
            log.error("导出Excel异常{}", e.getMessage());
            throw new CustomException("导出Excel失败，请联系网站管理员！");
        } finally {
            if (wb != null) {
                try {
                    wb.close();
                } catch (IOException e1) {
                    e1.printStackTrace();
                }
            }
            if (out != null) {
                try {
                    out.close();
                } catch (IOException e1) {
                    e1.printStackTrace();
                }
            }
        }
    }

前端

     request({
        method: 'post',
        url: '/investment/plan/remake/exportPlanProject2',
        data: this.queryParams,
        responseType: 'blob'
      }).then(res => {
        console.log('res---',res)
        const aLink = document.createElement('a')
        var fileName = '文件名称' + moment().format('YYYYMMDDHHmmss') + '.xlsx'
        fileName = fileName.replace(/\"/g, '')
        const url = window.URL.createObjectURL(res)
        console.log('url---',url)
        aLink.href = url
        aLink.download = fileName
        aLink.click()
        aLink.remove()
        URL.revokeObjectURL(url)
      })