public void download(HttpServletResponse response, String fileName, String businessName, String filedir1) throws IOException {        try {            filedir = filedir1;            OSSClient ossClient = new OSSClient(endpoint, accessKeyId, accessKeySecret);            //获取fileid对应的阿里云上的文件对象            OSSObject ossObject = getOssClient().getObject(bucketName, filedir + fileName);            // 读去Object内容  返回            BufferedInputStream in = new BufferedInputStream(ossObject.getObjectContent());            BufferedOutputStream out = new BufferedOutputStream(response.getOutputStream());            //通知浏览器以附件形式下载            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "utf-8"));            //BufferedOutputStream out=new BufferedOutputStream(new FileOutputStream(new File("f:\\a.txt")));            byte[] car = new byte[1024];            int L = 0;            while ((L = in.read(car)) != -1) {                out.write(car, 0, L);            }            if (out != null) {                out.flush();                out.close();            }            if (in != null) {                in.close();            }            ossClient.shutdown();        } catch (Exception e) {            e.printStackTrace();        }    }

阿里云OSS文件下载设置正确,不报错也无法下载文件

1.必须是get请求

2.必须是同步请求

所以在

@RequestMapping(value = "/downloadTemplate",method = RequestMethod.GET)

时必须使用上面的写法

不要使用ajax异步请求,而且在ajax中设置为get是不管用的

使用

window.open("/fileUpload/downloadTemplate?fileName="+$('#template').val(),'top');

如此来请求即可.