Java系列-SpringBoot生成二维码

概述

SpringBoot通过第三放库生成二维码

工作开始

pom.xml

<!-- 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.starter.config.utils;

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;

/**
 *
 * <p> Description: 生成二维码工具
 *
 * @author him
 * @version 1.0.0
 * @since 2020-12-24 11:41:32
 */
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:/JavaProject/page-starter/doc/QRTest.png");
            System.out.println("生成二维码结束");
        } catch (WriterException | IOException e) {
            e.printStackTrace();
        }
    }

}

效果图如下：

业务实例参考

/**
  * 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;
}

总结

PS参考: https://blog.csdn.net