用java编写生成二维码打印二维码
时间: 2023-11-26 13:05:47 浏览: 121
可以使用Java中的ZXing库来生成二维码,并且使用Java打印API来打印二维码。下面是一个简单的示例代码,可以生成一个包含文本信息的二维码并打印出来:
```java
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import javax.print.PrintService;
import javax.print.PrintServiceLookup;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
import javax.print.attribute.standard.MediaSizeName;
import javax.print.attribute.standard.OrientationRequested;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
public class QRCodePrinter {
public static void main(String[] args) throws Exception {
// Generate QR code
String text = "Hello, world!";
int width = 200;
int height = 200;
String fileType = "png";
File qrFile = new File("qrcode.png");
BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height);
BufferedImage qrImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
qrImage.createGraphics().drawImage(toBufferedImage(bitMatrix), 0, 0, null);
ImageIO.write(qrImage, fileType, qrFile);
// Print QR code
PrintService printService = PrintServiceLookup.lookupDefaultPrintService();
PrintRequestAttributeSet printRequestAttributeSet = new HashPrintRequestAttributeSet();
printRequestAttributeSet.add(MediaSizeName.ISO_A4);
printRequestAttributeSet.add(OrientationRequested.PORTRAIT);
BufferedImage printImage = new BufferedImage(qrImage.getWidth(), qrImage.getHeight(), BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = printImage.createGraphics();
g2d.drawImage(qrImage, 0, 0, null);
g2d.dispose();
printService.createPrintJob().print(printImage, printRequestAttributeSet);
}
private static BufferedImage toBufferedImage(BitMatrix matrix) {
int width = matrix.getWidth();
int height = matrix.getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
image.setRGB(x, y, matrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
}
}
return image;
}
}
```
这个示例代码使用了ZXing库来生成二维码,并使用Java打印API来打印二维码。在运行这个代码之前,需要将ZXing库添加到你的项目中。可以在这里下载ZXing库:https://github.com/zxing/zxing。
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