文件下载

前端代码一个a标签，href就是要访问的controller的路径，以下是文件下载Java代码，chrome要选高级，然后配置，不然每次都保存默认位置，不会弹出另存框

    //文件下载
    @RequestMapping(value = "/downFile",method = RequestMethod.GET)
    public void downloadImage(String fileName,HttpServletRequest request, HttpServletResponse response) {
        //处理一下文件名，不然中文乱码
        fileName = new String(fileName.getBytes("gbk"), "ISO8859-1");
        //文件路径
        String fileUrl = "C:\\test\\123.txt";
        if (fileUrl != null) {
            File file = new File(fileUrl);
            if (file.exists()) {
                response.setContentType("application/force-download");// 设置强制下载不打开
                response.addHeader("Content-Disposition",
                        "attachment;fileName=" + fileName);// 设置文件名
                byte[] buffer = new byte[1024];
                FileInputStream fis = null;
                BufferedInputStream bis = null;
                try {
                    fis = new FileInputStream(file);
                    bis = new BufferedInputStream(fis);
                    OutputStream os = response.getOutputStream();
                    int i = bis.read(buffer);
                    while (i != -1) {
                        os.write(buffer, 0, i);
                        i = bis.read(buffer);
                    }
                    System.out.println("success");
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    if (bis != null) {
                        try {
                            bis.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                    if (fis != null) {
                        try {
                            fis.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }
        }
    }

本文地址：https://blog.csdn.net/a3562323/article/details/109276929