### Question:
QRCode { public File encode(Profile profile) { try { File isFile = new File(profile.getPath()); if (!isFile.exists()) { isFile.mkdirs(); } SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss"); String fileName = UUID.randomUUID() + "." + profile.getFormat(); File file = new File(profile.getPath(), fileName); BufferedImage bufferedImage = encodeToBufferedImage(profile); ImageIO.write(bufferedImage, profile.getFormat(), file); return file; } catch (Exception e) { e.printStackTrace(); } return null; }  File encode(Profile profile); OutputStream encodeToOutputStream(Profile profile); BufferedImage getBufferedImage(BitMatrix bitMatrix, boolean isLogo, String logoPath); BufferedImage toBufferedImageContents(BitMatrix bitMatrix); String decode(InputStream inputStream); String decode(BufferedImage image); String decode(String path);  }### Answer:
@Test public void testEncode() throws Exception { QRCode qrCode = new QRCode(); File file = qrCode.encode(profile); System.out.println("生成二维码: " + file); String decode = qrCode.decode(file.getPath()); Assert.assertEquals(decode, profile.getContent()); }