效果图
步骤
maven依赖
com.google.zxing
javase
3.3.0
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 = "http://" + 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 = "http://" + 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
原文：
blog.csdn.net/weixin_43469680/article/details/110791319
（完）
