前后端通过window.location.href 加载

1.前端
window.location.href = "/system/dept/download2?excel_path=" + result.dept_excel_path;
2.后端

@GetMapping("/download2")

@ApiOperation(value = "下载错误数据Excel", notes = "下载错误数据Excel", httpMethod = "POST")
public AjaxResult  download(String excel_path, HttpServletResponse response, HttpServletRequest request) {
    try {
        String filePath = excel_path;
        response.setCharacterEncoding("utf-8");
        response.setContentType("multipart/form-data");
        response.setHeader("Content-Disposition",
                "attachment;fileName=" + setFileDownloadHeader(request, "单位目录错误数据.xlsx"));
        FileUtils.writeBytes(filePath, response.getOutputStream());
        FileUtils.deleteFile(filePath);

    } catch (Exception e) {
        logger.error("下载文件失败", e);
    }

    return success().put("dept_excel_path", excel_path);
}