一。往pom文件添加
<!-- 生成二维码 -->
<dependency>
<groupId>net.glxn.qrgen</groupId>
<artifactId>javase</artifactId>
<version>2.0</version>
</dependency>
二、代码
/**
* 作者: yushuangyu
* 时间: 2020年07月26日 9:16
* 描述: 二维码生成工具
*/
@Slf4j
public class QrCodeUtils {
/**
* 生成不带白边的二维码
*
* @param content 二维码内容(目标url)
* @param qrCodePath 生成的二维码地址(最终保存地址)
* @throws Exception 异常
*/
public static void generatorQrCode(String content, String qrCodePath) throws Exception {
Map<EncodeHintType, Object> hints = new HashMap<>();
hints.put(EncodeHintType.MARGIN, 0);
BitMatrix bitMatrix = new QRCodeWriter().encode(content, BarcodeFormat.QR_CODE, 256, 256, hints);
// 去白边
int[] rec = bitMatrix.getEnclosingRectangle();
int resWidth = rec[2] + 1;
int resHeight = rec[3] + 1;
BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);
resMatrix.clear();
for (int i = 0; i < resWidth; i++) {
for (int j = 0; j < resHeight; j++) {
if (bitMatrix.get(i + rec[0], j + rec[1])) {
resMatrix.set(i, j);
}
}
}
int width = resMatrix.getWidth();
int height = resMatrix.getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
if (resMatrix.get(x, y)) {
// image.setRGB(x, y, Color.BLACK.getRGB());
image.setRGB(x, y, -16777216);
} else {
// image.setRGB(x, y, Color.WHITE.getRGB());
image.setRGB(x, y, -1);
}
}
}
ImageIO.write(image, "png", new File(qrCodePath));
}
@Test
public void genInviteQrCode3() {
String qrCodePath = "https://www.baidu.com";
String qrCodeLocalPath = "C:\\Users\\Administrator\\Pictures\\测试\\百度首页22.png";
try {
// 生成不带白边的二维码
QrCodeUtils.generatorQrCode(qrCodePath, qrCodeLocalPath);
} catch (Exception e) {
log.info("error :{}", JSON.toJSON(e));
}
}
}