Spring MVC返回pdf文件并在页面显示而不是下载

  spring mvc下载pdf

@RequestMapping(value="/getpdf", method=RequestMethod.POST)
public ResponseEntity<byte[]> getPDF(@RequestBody String json) {

    // 读取pdf文件到字节里
    Path path = Paths.get("path/to/file");
    byte[] contents = Files.readAllBytes(path);

    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.parseMediaType("application/pdf"));
    String filename = "output.pdf";
    headers.setContentDispositionFormData("attachment", filename);
    headers.setCacheControl("must-revalidate, post-check=0, pre-check=0");
    ResponseEntity<byte[]> response = new ResponseEntity<byte[]>(contents, headers, HttpStatus.OK);
    return response;
}

  如果上面的代码变为下载，可以尝试

headers.setContentDispositionFormData("inline", fileName);

  或

headers.add("content-disposition", "inline;filename=" + fileName)

  浏览器会尝试把inline的内容显示在页面。
  如果有中文乱码问题：

headers.setContentDispositionFormData("attachment", new String(filename.getBytes("utf-8"), "ISO8859-1"));