From 37050662ec4b519b85054e668d4e0ba3c90092a2 Mon Sep 17 00:00:00 2001
From: jkcdev <dingchao@jkcchina.com>
Date: Tue, 27 May 2025 09:04:40 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=94=B9=E5=AE=8C=E5=96=84=E4=BA=8C?=
 =?UTF-8?q?=E7=BB=B4=E7=A0=81=E7=94=9F=E6=88=90=EF=BC=8C=E5=A2=9E=E5=8A=A0?=
 =?UTF-8?q?=E5=86=85=E5=AE=B9=E6=96=87=E5=AD=97?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../cdzy/ebikeoperate/utils/QRGenUtil.java    | 41 +++++++++++++++++--
 1 file changed, 38 insertions(+), 3 deletions(-)

diff --git a/ebike-operate/src/main/java/com/cdzy/ebikeoperate/utils/QRGenUtil.java b/ebike-operate/src/main/java/com/cdzy/ebikeoperate/utils/QRGenUtil.java
index fb95223a..59fb07d5 100644
--- a/ebike-operate/src/main/java/com/cdzy/ebikeoperate/utils/QRGenUtil.java
+++ b/ebike-operate/src/main/java/com/cdzy/ebikeoperate/utils/QRGenUtil.java
@@ -4,6 +4,10 @@ import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
 import net.glxn.qrgen.core.image.ImageType;
 import net.glxn.qrgen.javase.QRCode;
 
+import javax.imageio.ImageIO;
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.util.Base64;
 
@@ -18,17 +22,48 @@ public class QRGenUtil {
 
     /**
      * 生成二维码并返回Base64编码
+     * <p>增加内容文字
      *
      * @param content 二维码内容
      * @return Base64编码的二维码
      */
     public static String generateQRCodeBase64(String content) {
-        try (ByteArrayOutputStream stream = QRCode.from(content)
-                .withSize(300, 300)          // 尺寸
+        // 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()) {
+
+            // 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(content);
+            int x = (qrImage.getWidth() - textWidth) / 2;
+            int y = qrImage.getHeight() - 2; // 底部留白
+
+            // 添加文字说明
+            g2d.drawString(content, 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 Base64.getEncoder().encodeToString(stream.toByteArray());
         } catch (Exception e) {
             throw new RuntimeException("生成二维码失败", e);
@@ -36,7 +71,7 @@ public class QRGenUtil {
     }
 
     //public static void main(String[] args) {
-    //    String content = "B726500590095"; // 二维码内容
+    //    String content = "B72650"; // 二维码内容
     //    String base64 = generateQRCodeBase64(content);
     //    System.out.println("Base64 二维码: " + base64);
     //}