h5+sbringboot 怎么写下载文件

您可以使用以下代码将文件下载到本地：

@GetMapping("/download")
public void downloadFile(HttpServletResponse response) throws IOException {
    String fileName = "file.txt";
    File file = new File(fileName);

    // 设置响应头
    response.setContentType("application/octet-stream");
    response.setHeader("Content-Disposition", "attachment;filename=" + fileName);

    // 读取文件并写入响应流
    InputStream inputStream = new FileInputStream(file);
    OutputStream outputStream = response.getOutputStream();
    byte[] buffer = new byte[1024];
    int len;
    while ((len = inputStream.read(buffer)) > 0) {
        outputStream.write(buffer, 0, len);
    }
    outputStream.flush();
    outputStream.close();
    inputStream.close();
}