导入Zxing依赖
Gradle
// https://mvnrepository.com/artifact/com.google.zxing/core google
implementation group: 'com.google.zxing', name: 'core', version: '3.4.0'
// https://mvnrepository.com/artifact/com.google.zxing/javase
implementation group: 'com.google.zxing', name: 'javase', version: '3.4.0'
Maven
<!-- https://mvnrepository.com/artifact/com.google.zxing/core -->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.4.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.zxing/javase -->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.4.0</version>
</dependency>
生成二维码工具类
/**
*
* @param content 二维码中需要包含的数据,如:content=https://www.baidu.com/
* @return 返回base64编码格式的二维码,前端只需要将base64编码转成图片即可
*/
public static String GenerateQRcode(String content) throws IOException, WriterException {
QRCodeWriter qrCodeWriter = new QRCodeWriter();
//设置二维码生成内容、格式、宽度、高度
BitMatrix bitMatrix = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, 600, 600);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
MatrixToImageWriter.writeToStream(bitMatrix, "png", outputStream);
Base64.Encoder encoder = Base64.getEncoder();
return encoder.encodeToString(outputStream.toByteArray());
}
加强工具类,支持返回base64,生成的二维码附带图片
package com.mosukj.util;
import com.google.zxing.*;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.Base64OutputStream;
import org.springframework.util.Base64Utils;
import javax.imageio.ImageIO;
import java.awt.

本文介绍如何使用Zxing库生成二维码,并提供了一个实用工具类,支持生成不同尺寸的二维码及带logo的二维码,同时返回二维码的Base64编码。
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