如何在springmvc控制器中获得下载位置浏览器

Question

接下来需要在服务器上制作文件，并将其发送到客户端并打印。

@RequestMapping(value = "/some", method = RequestMethod.GET)
public void getFileForPrint(HttpServletResponse response,
        @RequestParam(value = "id", required = true) Long id,
        @RequestParam(value = "print", defaultValue = "false") Boolean print) throws Exception {
    response.setCharacterEncoding("UTF-8");
    response.setHeader("Content-Disposition", "attachment; filename*=UTF-8''" + fname);
    ServletOutputStream out = response.getOutputStream();
    somefile.write(out);
    Desktop.getDesktop.print(new File("download location browser"));}
}

Answer 1

如果你的意思是当你达到一个终点时，你想立即下载一个文件，那么下面的代码应该会对你有所帮助。

@RequestMapping(value = "/somePath", method = RequestMethod.GET)
@ResponseBody
public void getFileForPrint(HttpServletResponse response,
        @RequestParam(value = "id", required = true) Long id,
        @RequestParam(value = "print", defaultValue = "false") Boolean print) throws Exception {
        String filename="nameOfFileWhenDownloaded.txt";
        try {
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            response.setHeader("Content-Disposition", "attachment; filename="" + filename + """);
            OutputStreamWriter osw = new OutputStreamWriter(response.getOutputStream());
            osw.write(contentsOfTheFile);
            osw.flush();
            osw.close();
            response.flushBuffer();
        } catch (Exception e) {
            e.printStackTrace();
            throw new Exception("Error is sending file");
        }
}