SpringBoot+vue实现文件下载

    @RequestMapping("/download/test")
    public void download(HttpServletResponse response,@RequestBody ProjectHistory projectHistory){
        response.setContentType("application/octet-stream");
        response.setHeader("Content-Disposition", "attachment; filename=license.lic");
 
        ProjectHistory serviceById = historyService.getById(projectHistory.getId());
        ///文件路径
        String licenseFilePath = serviceById.getLicenseFile();
 
        try {
            FileInputStream is = new FileInputStream(licenseFilePath);
            byte[] temp = new byte[is.available()];
            is.read(temp);
            response.getOutputStream().write(temp);
            is.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

<template slot-scope="scope">
<el-button @click="download(scope.row.id)" type="text" size="small">下载文件</el-button>
</template>

async download(id){
  const res = await this.downFile('www.baidu.com',{id:'00'}){
    let blob = new Blob([res.data]);
    let link = document.createElement('a');
    link.href = window.URL.createObjectURL(blob);
    link.download = '文件名称.txt';
    link.click();
    link.remove();
  }
}
downFile(url,params){
  const result = axios.post(url,params,{responseType:'blob'}).then(res =>{
    return res;
  });
  return result;
}