//圖片直接顯示   
public static void makeImg(String path,HttpServletResponse response) throws IOException {
        byte[] bytes = get64Img(path,response);
        response.setContentType("image/png");
        OutputStream output = response.getOutputStream();
        InputStream in = new ByteArrayInputStream(bytes);
        int len;
        byte[] buf = new byte[1024];
        while ((len = in.read(buf)) != -1) {
            output.write(buf, 0, len);
        }
        output.flush();
    }

//返回64位編碼
    public static byte[]  get64Img(String path, HttpServletResponse response){
        InputStream fis = null;
        ByteArrayOutputStream outputStream = null;
        byte[] finalBytes =null ;
            try{
            fis = new FileInputStream(new File(path + "\\" + "1.png"));
            outputStream = new ByteArrayOutputStream();
            byte[] bytes = new byte[1024];
            int temp;
            while ((temp = fis.read(bytes)) != -1) {
                outputStream.write(bytes, 0, temp);
            }
            //轉(zhuǎn)換后的byte[]
            finalBytes = outputStream.toByteArray();

            fis.close();
            outputStream.close();

        } catch (IOException e) {
            e.printStackTrace();
        }
        return finalBytes;
    }