提供一段代码，使用zxing生成二维码，并在二维码上方添加文字信息

String content = "你好，这是一个二维码";
String characterSet = "utf-8";
Bitmap bitmap = ZXingUtils.createQRCode(content, 300, 300, characterSet);// 在二维码上方添加文字
Bitmap newBitmap = ZXingUtils.addTextToQRCode(bitmap, "Hello World", characterSet);

相关问题

提供一段代码，使用zxing生成二维码并添加文字

示例：import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;

import javax.imageio.ImageIO;

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;

public class QRCodeGenerator {

// 生成二维码图片文件
public void generateQRCodeImage(String text, int width, int height, String filePath)
throws WriterException, IOException {
QRCodeWriter qrCodeWriter = new QRCodeWriter();

HashMap<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
hints.put(EncodeHintType.MARGIN, 2);
BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height, hints);

BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
image.createGraphics();

Graphics2D graphics = (Graphics2D) image.getGraphics();
graphics.setColor(Color.WHITE);
graphics.fillRect(0, 0, width, height);
graphics.setColor(Color.BLACK);

for (int i = 0; i < height; i++) {
for (int j = 0; j < width; j++) {
if (bitMatrix.get(i, j)) {
graphics.fillRect(i, j, 1, 1);
}
}
}
ImageIO.write(image, "png", new File(filePath));
}
}

提供一段代码，使用zxing生成带有文字信息的二维码

### 回答1：

String qrCodeData = "这是一段文字信息";
String filePath = "C:/qrcode.png";try {
//生成二维码QRCode图片
int width = 200;
int height = 200;
String format = "png";
Hashtable hints = new Hashtable();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
BitMatrix bitMatrix = new MultiFormatWriter().encode(qrCodeData, BarcodeFormat.QR_CODE, width, height, hints);
Path path = FileSystems.getDefault().getPath(filePath);
MatrixToImageWriter.writeToPath(bitMatrix, format, path);
} catch (Exception e) {
e.printStackTrace();
}答：使用zxing生成带有文字信息的二维码的代码如下：String qrCodeData = "这是一段文字信息";
String filePath = "C:/qrcode.png";try {
//生成二维码QRCode图片
int width = 200;
int height = 200;
String format = "png";
Hashtable hints = new Hashtable();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
BitMatrix bitMatrix = new MultiFormatWriter().encode(qrCodeData, BarcodeFormat.QR_CODE, width, height, hints);
Path path = FileSystems.getDefault().getPath(filePath);
MatrixToImageWriter.writeToPath(bitMatrix, format, path);
} catch (Exception e) {
e.printStackTrace();
}

### 回答2：
import java.io.File;
import java.nio.charset.StandardCharsets;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
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 com.google.zxing.qrcode.encoder.Encoder;

public class QRCodeGenerator {

public static void main(String[] args) {
String text = "Hello, ZXing!";
String filePath = "qrcode.png";
int width = 300;
int height = 300;

try {
// 设置QR码的纠错等级（L 7% M 15% Q 25% H 30%）
ErrorCorrectionLevel errorCorrectionLevel = ErrorCorrectionLevel.H;

// 创建一个字节矩阵即为QR码
BitMatrix bitMatrix = new QRCodeWriter().encode(text, BarcodeFormat.QR_CODE, width, height,
EncoderHints(EncodeHintType.ERROR_CORRECTION, errorCorrectionLevel));

// 生成二维码的图片格式
File outputFile = new File(filePath);

// 将二维码写入文件
MatrixToImageWriter.writeToFile(bitMatrix, "PNG", outputFile);

System.out.println("QR Code with text '" + text + "' created successfully.");
} catch (WriterException e) {
System.out.println("Error generating QR Code: " + e.getMessage());
}
}

}
以上代码使用zxing库生成带有文字信息的二维码。设置QR码的纠错等级为ErrorCorrectionLevel.H，即最高纠错等级。然后使用QRCodeWriter的encode方法生成QR码的字节矩阵。最后，将字节矩阵写入文件，并输出成功信息。

### 回答3：
使用zxing库生成带有文字信息的二维码的代码如下所示：

import com.google.zxing.BarcodeFormat;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.WriterException;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

public class QRCodeGenerator {
    public static void main(String[] args) {
        String text = "这是一个带有文字信息的二维码";
        int width = 300;
        int height = 300;
        String format = "png";
        String filePath = "qrcode.png";

        try {
            // 创建二维码写入器
            QRCodeWriter writer = new QRCodeWriter();
            BitMatrix bitMatrix = writer.encode(text, BarcodeFormat.QR_CODE, width, height);

            // 创建BufferedImage对象
            BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            image.createGraphics();

            // 将二维码像素颜色设置为黑白
            Graphics2D graphics = (Graphics2D) image.getGraphics();
            graphics.setColor(Color.WHITE);
            graphics.fillRect(0, 0, width, height);
            graphics.setColor(Color.BLACK);

            // 根据bitMatrix设置二维码像素颜色
            for (int x = 0; x < width; x++) {
                for (int y = 0; y < height; y++) {
                    if (bitMatrix.get(x, y)) {
                        graphics.fillRect(x, y, 1, 1);
                    }
                }
            }

            // 在二维码上添加文字信息
            graphics.setColor(Color.BLACK);
            Font font = new Font("Arial", Font.PLAIN, 12);
            graphics.setFont(font);
            graphics.drawString("文字信息：" + text, 5, height - 5);

            // 保存二维码图片到文件
            File qrCodeFile = new File(filePath);
            ImageIO.write(image, format, qrCodeFile);
            System.out.println("二维码生成成功！");

        } catch (WriterException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

这段代码使用zxing库生成二维码，将输入的文字信息转换成二维码，并在二维码上方添加文字信息。最后将生成的二维码保存在文件"qrcode.png"中。