springboot通过浏览器在线预览PDF文件

/**
     * 获取PDF信息
     * @param response
     */
    @GetMapping(value = "/getPdfInfo")
    public void getPdf(HttpServletResponse response) {
        InputStream is=null;
        OutputStream outputStream=null;
        try {
            Resource resource = new ClassPathResource("./***.pdf");
            is = resource.getInputStream();
            outputStream = response.getOutputStream();
            IOUtils.copy(is, outputStream);
            is.close();
            outputStream.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                if(null!=is){
                    is.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                if(null!=outputStream){
                    outputStream.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    }

效果