java生成二维码QRcode方式

1.下载QRcode的jar包
博主网盘直接下载

链接：https://pan.baidu.com/s/1LitW9vTykg54WJqvF2WXhw

提取码：a89a

2.安装到本地仓库
mvn install:install-file -Dfile=jar包的位置 -DgroupId=上面的groupId -DartifactId=上面的artifactId -Dversion=上面的version -Dpackaging=jar

3.导入依赖

com.qrcode qrcode 1.0 com.google.zxing core 3.3.0 com.google.zxing javase 3.0.0 4.生成以及解析工具

package com.example.qrCodeDemo;

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.google.zxing.;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.HybridBinarizer;
import com.itextpdf.text.pdf.qrcode.EncodeHintType;
import com.swetake.util.Qrcode;
import javax.imageio.ImageIO;
import java.awt.;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.URL;
import java.util.HashMap;

/**

• @Description: QRcode生成二维码

• @Author ajin

• @Version 1.0

• @Tool: IntelliJ IDEA
  */
  public class QRCodeUtil {
  private static final String path = “E:\”;
  private static final String fileName = “qrcode.png”;

  public static void main(String[] args) throws IOException, ChecksumException, NotFoundException, FormatException {
  // new QRCodeUtil().generateCode();
  new QRCodeUtil().readCode();

  }

  /**

  • @Author: ajin
  • @Description: 生成QRcode
    */
    public void generateCode() throws UnsupportedEncodingException {
    Qrcode x = new Qrcode();
    x.setQrcodeErrorCorrect(‘M’);//纠错等级
    x.setQrcodeEncodeMode(‘B’);//N 代表数据; A 代表a-A; B 代表其他字符
    x.setQrcodeVersion(7);//版本
    String qrData = “https://www.baidu.com/”;
    int width = 67 + 12 * (7 - 1);
    int height = 67 + 12 * (7 - 1);
    int pixoff = 2;//偏移量
    BufferedImage bufferedImage = new BufferedImage(width, height,
    BufferedImage.TYPE_INT_RGB);
    Graphics2D gs = bufferedImage.createGraphics();
    gs.setBackground(Color.WHITE);
    gs.setColor(Color.BLACK);
    gs.clearRect(0, 0, width, height);
    byte[] d = qrData.getBytes(“utf-8”);
    if (d.length > 0 && d.length < 120) {
    boolean[][] s = x.calQrcode(d);
    for (int i = 0; i < s.length; i++) {
    for (int j = 0; j < s.length; j++) {
    if (s[j][i]) {
    gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3);
    }
    }
    }
    }
    gs.dispose();
    bufferedImage.flush();
    try {
    ImageIO.write(bufferedImage, “png”, new File(path + fileName));
    OSS ossClient = new OSSClientBuilder().build(“YourEndpoint”, “YourAccessKeyId”, “YourSecretAccessKey”);
    ossClient.putObject(“YourBucket”, fileName, new FileInputStream(path + fileName));
    } catch (IOException e) {
    e.printStackTrace();
    }
    }

  /**

  • @Author: ajin
  • @Description: 解析QRcode
    */
    public void readCode() throws ChecksumException, NotFoundException, FormatException, IOException {
    BufferedImage bufferedImage = ImageIO.read(new URL(“https://picturelive0.oss-cn-beijing.aliyuncs.com/qrcode.png”));
    BufferedImageLuminanceSource bufferedImageLuminanceSource = new BufferedImageLuminanceSource(bufferedImage);
    BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(bufferedImageLuminanceSource));
    HashMap hashMap = new HashMap();
    hashMap.put(EncodeHintType.CHARACTER_SET, “utf-8”);//编码方式
    hashMap.put(BarcodeFormat.QR_CODE, “QR_CODE”);//二维码类型
    hashMap.put(DecodeHintType.PURE_BARCODE, Boolean.TRUE);//复杂模式，开启PURE_BARCODE模式
    Result decode = new MultiFormatReader().decode(binaryBitmap, hashMap);
    String text = decode.getText();
    System.out.println(“内容为” + text);
    }
    }