想在浏览器里直接GET目标URL,然后就把PDF在浏览器里预览出来(不用前端插件的前提下)，就像这样：

后端代码：

@RequestMapping(value = "/showPDF", method = RequestMethod.GET)

public ResponseEntity pdfDownload(

HttpServletRequest httpServletRequest

) throws IOException

{

String path = XXX省略。。。

File file = new File(path);

HttpHeaders httpHeaders = new HttpHeaders();

String fileName = file.getName();

httpHeaders.setContentDispositionFormData("attachment", java.net.URLEncoder.encode(fileName,"UTF-8"));

httpHeaders.setContentType(MediaType.parseMediaType("application/pdf"));

return new ResponseEntity(FileUtils.readFileToByteArray(file),

httpHeaders,

HttpStatus.CREATED);

}

然后想在前端直接GET这个URL地址：

http://localhost:8080/FileUpDown/showPDF

但是却成了下载文件而不是预览了。。。

这是chrome的输出：

**Response Headers**

*view source

Content-Disposition:form-data; name="attachment"; filename="1472111731322JavaScript%E6%9D%83%E5%A8%81%E6%8C%87%E5%8D%97.pdf"

Content-Length:21962427

Content-Type:application/octet-stream;charset=UTF-8

Date:Thu, 25 Aug 2016 08:32:56 GMT

Server:Apache-Coyote/1.1*

Conrent-Type明显不对，请问该如何解决？