二维码如何自动生成

使用在线工具

使用编程语言

Python

```python

import qrcode

qr = qrcode.QRCode(

version=1,

error_correction=qrcode.constants.ERROR_CORRECT_L,

box_size=10,

border=4,

)

qr.add_data('https://www.example.com')

qr.make(fit=True)

img = qr.make_image(fill_color="black", back_color="white")

img.save("example.png")

```

Java

```java

BarcodeFormat format = BarcodeFormat.QR_CODE;

MultiFormatWriter multiFormatWriter = new MultiFormatWriter();

BitMatrix bitMatrix = multiFormatWriter.encode("https://www.example.com", format, 350, 350);

Bitmap bitmap = Bitmap.createBitmap(bitMatrix.getWidth(), bitMatrix.getHeight(), Bitmap.Config.ARGB_8888);

for (int y = 0; y < bitMatrix.getHeight(); y++) {

for (int x = 0; x < bitMatrix.getWidth(); x++) {

bitmap.setPixel(x, y, bitMatrix.get(x, y) ? Color.BLACK : Color.WHITE);