Spring 响应中重复的标题

我正在返回文件下载的响应

@RequestMapping("/download")
public ResponseEntity<byte[]> download(){
    byte[] fileContent = manager.getFile();
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.parseMediaType("application/pdf"));
    headers.setPragma("cache");
    headers.setExpires(0);
    headers.setCacheControl("private");
    headers.setContentDispositionFormData("attachment", "sample.pdf");
    headers.setContentLength(fileContent.length);
    return new ResponseEntity<byte[]>(fileContent, headers, HttpStatus.OK); 
}

如果我使用HttpServletResponse以旧的方式执行此操作

public void download(HttpServletResponse response){
    byte[] fileContent = manager.getFile();
    response.reset();
    response.setContentType("application/pdf");
    response.setHeader("Pragma", "cache");
    response.setHeader("Expires", "0");
    response.setHeader("Cache-control", "private");
    response.setHeader("Content-Disposition", "attachment; filename=sample.pdf");
    FileCopyUtils.copy(fileContent, response.getOutputStream());
}

标题是我想要的

Cache-Control:private
Content-Disposition:form-data; name="attachment"; filename="sample-pdf.pdf"
Content-Length:1469
Content-Type:application/pdf;charset=UTF-8
Date:Thu, 15 Aug 2013 08:10:25 GMT
Expires:Thu, 01 Jan 1970 00:00:00 GMT
Pragma:cache
Server:Apache-Coyote/1.1

在使用

ResponseEntity

时，是否有任何方法清除http标头值？

请勿使用

headers.setContentDispositionFormData("attachment", "sample.pdf");

还是其他的

仅使用添加方法，如：

headers.add("Content-Disposition", "inline;filename=\"sample_"+System.currentTimeMillis()+".pdf\"");

headers.add("Content-Disposition", "inline;filename=\"sample_"+System.currentTimeMillis()+".pdf\"");