SpringBoot如何实现二维码的生成？

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效果图 + 步骤 + Maven 依赖!-- 生成二维码 --dependencygroupId: com.google.zxing groupIdartifactId: javase artifactIdversion: 3.3.0 version/dependency工具类package: com.bennyrhys.mall.util;import: com.google.zxing.BarcodeFormat;import: com.google.zxing.*;

效果图

步骤

maven依赖

<!-- 生成二维码--> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>3.3.0</version> </dependency>

工具类

package com.bennyrhys.mall.util; import com.google.zxing.BarcodeFormat; import com.google.zxing.WriterException; import com.google.zxing.client.j2se.MatrixToImageWriter; import com.google.zxing.common.BitMatrix; import com.google.zxing.qrcode.QRCodeWriter; import java.io.IOException; import java.nio.file.FileSystems; import java.nio.file.Path; /** * 描述： 生成二维码工具 */ public class QRCodeGenerator { public static void generateQRCodeImage(String text, int width, int height, String filePath) throws WriterException, IOException { QRCodeWriter qrCodeWriter = new QRCodeWriter(); BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height); Path path = FileSystems.getDefault().getPath(filePath); MatrixToImageWriter.writeToPath(bitMatrix, "PNG", path); } public static void main(String[] args) { try { generateQRCodeImage("Hello World", 350, 350, "E:/JAVA/mall/src/main/resources/images/QRTest.png"); } catch (WriterException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }

service

/** * 生成二维码 * 图片可解析出访问的支付对应订单号的支付连接 * @param orderNo 订单号 * @return 返回图片地址 */ @Override public String qrcode(String orderNo) { ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes(); HttpServletRequest request = attributes.getRequest(); String address = ip + ":" + request.getLocalPort(); String payUrl = "" + address + "/pay?orderNo=" + orderNo; try { QRCodeGenerator.generateQRCodeImage(payUrl, 350, 350, Constant.FILE_UPLOAD_PATH + orderNo + ".png"); } catch (WriterException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } String pngAddress = "" + address + "/images-dev/" + orderNo + ".png"; return pngAddress; }

扩展

局域网调试

线上调试

切换ip
# 指定IP(防止ip转发获取的是内网ip) file.upload.ip=127.0.0.1

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