attiya/ebike-plus
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二维码生成逻辑

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This commit is contained in:
PC 2026-02-09 14:36:38 +08:00
parent b07a1a08eb
commit 761892c485
2 changed files with 73 additions and 56 deletions
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3
ebike-operations/src/main/java/com/cdzy/operations/service/impl/EbikeBikeQrServiceImpl.java
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@ -53,7 +53,7 @@ public class EbikeBikeQrServiceImpl extends ServiceImpl<EbikeBikeQrMapper, Ebike
for (int i = 0; i < qrNum; i++) {
//二维码生成
String code = list.get(i);
ByteArrayInputStream byteArrayInputStream = QRGenUtil.generateQRCodeInputStearm(wechatConfig.getQrUrl()+ code + "&_tbScancodeApproach_=scan", code);
ByteArrayInputStream byteArrayInputStream = QRGenUtil.generateQRCodeWithStyledText(wechatConfig.getQrUrl()+ code + "&_tbScancodeApproach_=scan", code);
streamList.add(byteArrayInputStream);
names.add(bikeUrl+code +bikeSuffix);
EbikeBikeQr ebikeBikeQr = EbikeBikeQr.builder()
@ -61,6 +61,7 @@ public class EbikeBikeQrServiceImpl extends ServiceImpl<EbikeBikeQrMapper, Ebike
.bikeQrCode(code)
.bikeQr(minioUtil.getShowUrl(bikeUrl+code +bikeSuffix))
.createdBy(StpUtil.getLoginIdAsLong())
.createdBy(320131029184712704L)
.status(BikeQrStatus.UN_BIND)
.build();
qrList.add(ebikeBikeQr);

126
ebike-operations/src/main/java/com/cdzy/operations/utils/QRGenUtil.java
View File

@ -75,61 +75,6 @@ public class QRGenUtil {
}
/**
* 生成二维码
* <p>增加内容文字
*
* @param content 二维码内容
* @param text 文字内容
* @return Base64编码的二维码
*/
public static BufferedImage generateQRCode(String content, String text) {
// 1. 生成基础二维码
try (ByteArrayOutputStream qrStream = QRCode.from(content)
.withSize(300, 300)
.withCharset("UTF-8")
.withErrorCorrection(ErrorCorrectionLevel.H) // 纠错等级（H为最高）
.to(ImageType.PNG) // 输出格式
.stream()) {
if(text == null || text.isEmpty()){
throw new RuntimeException("二维码内容为空");
}
// 2. 将二维码转换为 BufferedImage
ByteArrayInputStream inputStream = new ByteArrayInputStream(qrStream.toByteArray());
BufferedImage qrImage = ImageIO.read(inputStream);
// 3. 创建新 BufferedImage 并绘制文字
BufferedImage finalImage = new BufferedImage(
qrImage.getWidth(), qrImage.getHeight()+ 20, // 增加文字区域高度,
BufferedImage.TYPE_INT_ARGB
);
Graphics2D g2d = finalImage.createGraphics();
g2d.drawImage(qrImage, 0, 0, null);
// 设置文字样式
g2d.setFont(new Font("Arial", Font.BOLD, 20));
g2d.setColor(Color.BLACK);
// 计算文字位置（底部居中）
int textWidth = g2d.getFontMetrics().stringWidth(text);
int x = (qrImage.getWidth() - textWidth) / 2;
int y = qrImage.getHeight() - 2; // 底部留白
// 添加文字说明
g2d.drawString(text, x, y);
g2d.dispose();
// 使用 Java 8+ 的 Base64 编码（避免自动换行问题）
ByteArrayOutputStream stream = new ByteArrayOutputStream();
ImageIO.write(finalImage, "PNG", stream);
return finalImage;
} catch (Exception e) {
throw new RuntimeException("生成二维码失败", e);
}
}
public static ByteArrayInputStream generateQRCodeInputStearm(String content, String text) {
// 1. 生成基础二维码
try (ByteArrayOutputStream qrStream = QRCode.from(content)
@ -148,4 +93,75 @@ public class QRGenUtil {
throw new RuntimeException("生成二维码失败", e);
}
}
public static ByteArrayInputStream generateQRCodeWithStyledText(String content, String text) {
try {
// 生成基础二维码
ByteArrayOutputStream qrStream = QRCode.from(content)
.withSize(300, 300)
.withCharset("UTF-8")
.withErrorCorrection(ErrorCorrectionLevel.H)
.to(ImageType.PNG)
.stream();
// 转换为 BufferedImage
BufferedImage qrImage = ImageIO.read(new ByteArrayInputStream(qrStream.toByteArray()));
int qrWidth = qrImage.getWidth();
int qrHeight = qrImage.getHeight();
int textAreaHeight = 60; // 增加文字区域高度
int totalHeight = qrHeight + textAreaHeight;
BufferedImage finalImage = new BufferedImage(qrWidth, totalHeight, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = finalImage.createGraphics();
// 设置白色背景
g2d.setColor(Color.WHITE);
g2d.fillRect(0, 0, qrWidth, totalHeight);
// 绘制二维码
g2d.drawImage(qrImage, 0, 0, null);
// 绘制文字（带样式）
if (text != null && !text.isEmpty()) {
// 设置字体样式
Font font = new Font("微软雅黑", Font.BOLD, 24);
g2d.setFont(font);
// 设置抗锯齿
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
// 计算文字位置
FontMetrics metrics = g2d.getFontMetrics();
int textWidth = metrics.stringWidth(text);
int textX = (qrWidth - textWidth) / 2;
int textY = qrHeight + 20;
// 绘制文字阴影（可选）
g2d.setColor(Color.LIGHT_GRAY);
g2d.drawString(text, textX + 1, textY + 1);
// 绘制文字主体
g2d.setColor(new Color(51, 51, 51)); // 深灰色
g2d.drawString(text, textX, textY);
// 可选：添加分隔线
// g2d.setColor(new Color(200, 200, 200));
// g2d.setStroke(new BasicStroke(1));
// g2d.drawLine(20, qrHeight + 15, qrWidth - 20, qrHeight + 15);
}
g2d.dispose();
// 转换为 InputStream
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(finalImage, "PNG", baos);
return new ByteArrayInputStream(baos.toByteArray());
} catch (Exception e) {
throw new RuntimeException("生成二维码失败", e);
}
}
}