本教程提供了用于在Java中生成QR码的代码示例。

package GenerateBarcode;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

import com.spire.barcode.BarCodeGenerator;
import com.spire.barcode.BarCodeType;
import com.spire.barcode.BarcodeSettings;
import com.spire.barcode.QRCodeECL;
import com.sun.javafx.print.Units;

public class QR_Code {

	public static void main(String[] args) throws IOException {

        //create an instance of BarcodeSetteings
        BarcodeSettings settings = new BarcodeSettings();
        //set barcode type
        settings.setType(BarCodeType.QR_CODE);
        //set barcode data
        settings.setData("ABC 123456789");
        //set dispaly text
        settings.setData2D("ABC 123456789");
        //show text on bottom
        settings.setShowTextOnBottom(true);
        //set the border invisible
        settings.hasBorder(false);
        //set width of the barcode module
        settings.setX(2);
        //set the error correction level
        settings.setQRCodeECL(QRCodeECL.M);    
        //create BarCodeGenerator object based on settings
        BarCodeGenerator barCodeGenerator = new BarCodeGenerator(settings);
        //generate image data and store in BufferedImage instance
        BufferedImage bufferedImage = barCodeGenerator.generateImage();
        //save to image
        ImageIO.write(bufferedImage,"png",new File("QR_CODE.png"));
        System.out.println("Complete!");
	}

}

输出：

点击下载Spire.Barcode for JAVA