在浏览器中预览、下载pdf文件

浏览器直接打开pdf文件： 

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1 2	const pdfWindow = window.open(url, '_blank'); pdfWindow.print();

　　如果上面的代码是直接下载了pdf文件， 则可以改为：

window.open(api/dms/downloadViewFile + '?url=' + res, '_blank');

后端代码：

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@GetMapping(value = "/downloadViewFile") public @ResponseBody ResponseEntity<Resource> downloadViewFile(@RequestParam("url") String url) {     logger.debug("url: {}", url);     String contentType = "application/pdf";     ResponseEntity<byte[]> bytes = ResponseEntity.ok().body(null);;     try {         bytes = new RestTemplate().getForEntity(url, byte[].class);     } catch (Exception e) {         url = url.replace("https","http");         bytes = new RestTemplate().getForEntity(url, byte[].class);     }     ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(Objects.requireNonNull(bytes.getBody()));     ResponseEntity<Resource> res= ResponseEntity.ok().contentType(MediaType.parseMediaType(contentType))             .header(HttpHeaders.CONTENT_DISPOSITION, "inline; filename=\"" + "tu.pdf" + "\"").body(new InputStreamResource(byteArrayInputStream));     return res; }