springboot 图片回显/文件回显

图片回显:

    /**
     * 图片回显
     *
     * @param request
     * @param response
     * @throws IOException
     */
    @GetMapping("/imageshow")
    public void imageShow(HttpServletRequest request, HttpServletResponse response, HttpSession session) throws IOException {
        response.setContentType("image/jpeg");
        OutputStream out = response.getOutputStream();
        String imgFileName = request.getParameter("myimage");
        String imgFileNameWithPath = filepathDir + "/images/" + imgFileName;
        try (FileImageInputStream input = new FileImageInputStream(new File(imgFileNameWithPath));
             ByteArrayOutputStream output = new ByteArrayOutputStream();) {
            byte[] buf = new byte[1024];
            int len = -1;
            while ((len = input.read(buf)) != -1) {
                output.write(buf, 0, len);
            }
            byte[] data = output.toByteArray();
            out.write(data);
            out.flush();
        } catch (FileNotFoundException ex) {
            ex.printStackTrace();
        }
    }
    

生成html文件：

  @PostMapping("save")
    public String saveArticle(@RequestParam("value") String value) {
        String filename = svaeFile(value);
        return filename;
    }


    public String svaeFile(String value) {

        StringBuilder sb = new StringBuilder();

        sb.append("");
        sb.append("");
        sb.append("");
        sb.append("");
        sb.append("");
        sb.append("");
        sb.append("");
        sb.append("");
        sb.append("");
        sb.append("");
        sb.append("");
        sb.append("");
        sb.append("
");
        sb.append(value);
        sb.append("
");
        sb.append("");
        sb.append("");
        sb.append("");

        try {
            String uuid = UUID.randomUUID().toString();
            String savePath = filepathDir + uuid + ".html";
            File file = new File(savePath);
            if (!file.exists()) {
                file.createNewFile();
            }
            FileOutputStream outputStream = new FileOutputStream(savePath);
            BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
            bufferedWriter.write(sb.toString());
            bufferedWriter.newLine();// 换行
            bufferedWriter.flush();
            bufferedWriter.close();

            return uuid + ".html";
        } catch (IOException e) {

            return null;

        }

    }

显示文件：

/**
     * 显示文件
     *
     * @param request
     * @param response
     * @throws IOException
     */
    @GetMapping("/fileshow")
    public void fileShow(HttpServletRequest request, HttpServletResponse response, HttpSession session) throws IOException {
        OutputStream out = response.getOutputStream();
        String imgFileName = request.getParameter("myfile");
        String imgFileNameWithPath = filepathDir + imgFileName;
        try (FileImageInputStream input = new FileImageInputStream(new File(imgFileNameWithPath));
             ByteArrayOutputStream output = new ByteArrayOutputStream();) {
            byte[] buf = new byte[1024];
            int len = -1;
            while ((len = input.read(buf)) != -1) {
                output.write(buf, 0, len);
            }
            byte[] data = output.toByteArray();
            out.write(data);
            out.flush();
        } catch (FileNotFoundException ex) {
            ex.printStackTrace();
        }
    }