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perf: 优化设备二维码显示效果

This commit is contained in:
曹鹏飞 2025-11-03 11:10:28 +08:00
parent 50b2d81ec5
commit d6ff7814fc
2 changed files with 14 additions and 11 deletions
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2
nflg-mobilebroken-admin/src/main/java/com/nflg/mobilebroken/admin/service/DeviceQRCodeService.java
View File

@ -18,6 +18,6 @@ public class DeviceQRCodeService {
public byte[] generate(String deviceNo, String modelNo) throws Exception { public byte[] generate(String deviceNo, String modelNo) throws Exception {
ParamConfig config = paramConfigService.lambdaQuery().eq(ParamConfig::getCode, "DeviceQRCodeHost").one(); ParamConfig config = paramConfigService.lambdaQuery().eq(ParamConfig::getCode, "DeviceQRCodeHost").one();
return QRCodeUtil.generateDeviceQRCode(deviceNo ,StrUtil.format(config.getValue(), deviceNo,modelNo),200, 200); return QRCodeUtil.generateDeviceQRCode(deviceNo, StrUtil.format(config.getValue(), deviceNo, modelNo), 550, 550);
} }
} }

23
nflg-mobilebroken-common/src/main/java/com/nflg/mobilebroken/common/util/QRCodeUtil.java
View File

@ -11,6 +11,7 @@ import javax.imageio.ImageIO;
import java.awt.*; import java.awt.*;
import java.awt.image.BufferedImage; import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream; import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.util.Hashtable; import java.util.Hashtable;
public class QRCodeUtil { public class QRCodeUtil {
@ -48,16 +49,16 @@ public class QRCodeUtil {
/** /**
* 为图片添加边框和文字 * 为图片添加边框和文字
*
* @param qrImage 原始二维码图片 * @param qrImage 原始二维码图片
* @param text 要添加的文字 * @param text 要添加的文字
* @return 带边框和文字的新图片 * @return 带边框和文字的新图片
*/ */
private static BufferedImage addBorderAndText(BufferedImage qrImage, String text) { private static BufferedImage addBorderAndText(BufferedImage qrImage, String text) throws Exception {
int borderSize = 1; int borderSize = 1;
int extend=10; int extend1 = 10;
int newWidth = qrImage.getWidth() + extend; int extend2 = 50;
int newHeight = qrImage.getHeight() + extend; int newWidth = qrImage.getWidth() + extend1;
int newHeight = qrImage.getHeight() + extend2;
// 创建新画布（扩大尺寸以容纳边框） // 创建新画布（扩大尺寸以容纳边框）
BufferedImage newImage = new BufferedImage( BufferedImage newImage = new BufferedImage(
newWidth, newWidth,
@ -65,11 +66,12 @@ public class QRCodeUtil {
BufferedImage.TYPE_INT_RGB BufferedImage.TYPE_INT_RGB
); );
Graphics2D g = newImage.createGraphics(); Graphics2D g = newImage.createGraphics();
g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
// 填充边框颜色 // 填充边框颜色
g.setColor(Color.WHITE); g.setColor(Color.WHITE);
g.fillRect(0, 0, newWidth, newHeight); g.fillRect(0, 0, newWidth, newHeight);
// 绘制原始二维码（居中） // 绘制原始二维码（居中）
g.drawImage(qrImage, borderSize + extend / 2, borderSize, null); g.drawImage(qrImage, borderSize + extend1 / 2, borderSize, null);
// 绘制边框 // 绘制边框
g.setColor(Color.BLACK); g.setColor(Color.BLACK);
g.setStroke(new BasicStroke(borderSize)); g.setStroke(new BasicStroke(borderSize));
@ -79,13 +81,14 @@ public class QRCodeUtil {
g.drawLine(0, newHeight - borderSize, newWidth, newHeight - borderSize); g.drawLine(0, newHeight - borderSize, newWidth, newHeight - borderSize);
// 添加文字（居中显示） // 添加文字（居中显示）
g.setColor(Color.BLACK); g.setColor(Color.BLACK);
g.setFont(new Font("Arial", Font.PLAIN, 14)); InputStream is = QRCodeUtil.class.getResourceAsStream("/fonts/simsun.ttc");
g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON); Font baseFont = Font.createFont(Font.TRUETYPE_FONT, is).deriveFont(Font.BOLD, 45.0f);
g.setFont(baseFont);
FontMetrics fm = g.getFontMetrics(); FontMetrics fm = g.getFontMetrics();
int textWidth = fm.stringWidth(text); int textWidth = fm.stringWidth(text);
int x = (newImage.getWidth() - textWidth) / 2; int x = (newImage.getWidth() - textWidth) / 2;
int y = newImage.getHeight() - 15; g.drawString(text, x, qrImage.getHeight() + (extend2 - fm.getAscent()) / 2);
g.drawString(text, x, y); is.close();
g.dispose(); g.dispose();
return newImage; return newImage;
} }