前俩天项目需要用到二维码,然后收集了一下放到这里
public class QrcodeService {
public static boolean encoderQRCode(String content, String imgPath) {
ExceptionUtil.checkEmpty(content, "链接不能为空");
boolean isSuccess = true;
try {
Qrcode qrcodeHandler = new Qrcode();
// 设置二维码排错率,可选L(7%)、M(15%)、Q(25%)、H(30%),排错率越高可存储的信息越少,但对二维码清晰度的要求越小
qrcodeHandler.setQrcodeErrorCorrect('L');
qrcodeHandler.setQrcodeEncodeMode('B');
qrcodeHandler.setQrcodeVersion(5);
// int imgSize = 67 + 12 * (size - 1);
byte[] contentBytes = content.getBytes("gb2312");
BufferedImage bufImg = new BufferedImage(115, 115, BufferedImage.TYPE_INT_RGB);
Graphics2D gs = bufImg.createGraphics();
gs.setBackground(Color.WHITE);
gs.clearRect(0, 0, 115, 115);
// 设定图像颜色> BLACK
gs.setColor(Color.BLACK);
// 设置偏移量 不设置可能导致解析出错
int pixoff = 2;
// 输出内容> 二维码
if (contentBytes.length > 0 && contentBytes.length < 800) {
boolean[][] codeOut = qrcodeHandler.calQrcode(contentBytes);
for (int i = 0; i < codeOut.length; i++) {
for (int j = 0; j < codeOut.length; j++) {
if (codeOut[j][i]) {
gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3);
}
}
}
} else {
System.err.println("QRCode content bytes length = " + contentBytes.length + " not in [ 0,120 ]. ");
}
gs.dispose();
bufImg.flush();
// 生成二维码QRCode图片
ImageIO.write(bufImg, "png", new File(imgPath));
return isSuccess;
} catch (Exception e) {
isSuccess = false;
e.printStackTrace();
return isSuccess;
}
}
}
public static void main(String[] args) {
//1参数:将图片存放到哪 2:扫描图片跳转到那个页面
QrcodeService.encoderQRCode("/uploadroot/lannong/qrcode/1.png", "https://www.baidu.com");
}