Spring boot中下载文件名称中文变___________下划线了，请问如何处理？

Question

@GetMapping("/download")
@ResponseBody
public ResponseEntity serveFile(@RequestParam String filename) throws IOException{
    filename=new String(filename.getBytes(),"utf-8");//有没有这句话都不行
    Resource file=new FileSystemResource("D:\\workspace\\idea_me\\demo\\upload-dir"+File.separator+ filename);
    HttpHeaders headers = new HttpHeaders();
    headers.add("Cache-Control", "no-cache, no-store, must-revalidate");
    headers.add("Content-Disposition", String.format("attachment; filename=\"%s\"", file.getFilename()));
    headers.add("Pragma", "no-cache");
    headers.add("Expires", "0");
    return ResponseEntity
            .ok()
            .headers(headers)
            .contentLength(file.contentLength())
            .contentType(MediaType.parseMediaType("application/octet-stream;charset=utf-8"))//这里也是都不行
            .body(new InputStreamResource(file.getInputStream()));
}

Answer 1

//使得你上面的代码具有以下作用 response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode("壁纸.jpg", "UTF-8"));  response.setHeader("Context-Type", "application/xmsdownload");