编程刷二维码怎么刷的出来

要使用编程语言生成二维码，你可以选择不同的编程语言和相应的库。以下是一些流行的编程语言及其对应的二维码生成库：

Python:

库: `qrcode`

示例代码:

```python

import qrcode

qr = qrcode.QRCode(

version=1,

error_correction=qrcode.constants.ERROR_CORRECT_L,

box_size=10,

border=4,

)

qr.add_data("Hello, World!")

qr.make(fit=True)

image = qr.make_image()

image.save("hello_world.png")

```

Java:

库: `ZXing`

示例代码:

```java

import com.google.zxing.BarcodeFormat;

import com.google.zxing.EncodeHintType;

import com.google.zxing.WriterException;

import com.google.zxing.common.BitMatrix;

import com.google.zxing.qrcode.QRCodeWriter;

import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import java.nio.file.FileSystems;

import java.nio.file.Path;

import java.util.HashMap;

import java.util.Map;

public class QRCodeGenerator {

private static final String QR_CODE_IMAGE_PATH = "./MyQRCode.png";

private static void generateQRCodeImage(String text, int width, int height, String filePath)

throws WriterException {

QRCodeWriter qrCodeWriter = new QRCodeWriter();

Map hints = new HashMap<>();

hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);

hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

hints.put(EncodeHintType.MARGIN, 1);

BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height, hints);

Path path = FileSystems.getDefault().getPath(filePath);

MatrixToImageWriter.writeToPath(bitMatrix, "PNG", path);

}

public static void main(String[] args) {

try {

generateQRCodeImage("Hello, World!", 350, 350, QR_CODE_IMAGE_PATH);

} catch (WriterException e) {

System.err.println("Could not generate QR Code, WriterException :: " + e.getMessage());

}

}

}

```

JavaScript:

库: `qrcode.js` 或 `jsQR`

示例代码（使用 `qrcode.js`）:

```html