如果有有java后端代码如下

    @SneakyThrows
    @ApiOperation("访问文件")
    @GetMapping("/download/{name}")
    public void getImage(HttpServletResponse response, @PathVariable("name") String name) {
        String imagePath = uploadFilePath + File.separator + name;
        if (!new File(imagePath).exists()) {
            return;
        }
        if (name.endsWith("jpg") || name.endsWith("png") || name.endsWith("gif") || name.endsWith("jpeg")) {
            //预览时不需设置Content-Disposition
            /**图片*/
            response.setContentType("image/jpeg;charset=utf-8");
        } else {
            //下载文件
            response.setContentType("application/octet-stream");
            response.setHeader("Content-Disposition", "inline; filename=" + URLEncoder.encode(name, "UTF-8"));
        }
        ServletOutputStream outputStream = response.getOutputStream();
        outputStream.write(Files.readAllBytes(Paths.get(uploadFilePath).resolve(name)));
        outputStream.flush();
        outputStream.close();
    }

在360浏览器安装如下插件，打开请求访问的就不是下载，而是直接在浏览器预览

在谷歌浏览器中，搜索极简插件，安装如下插件，打开请求访问的就不是下载，而是直接在浏览器预览