生成二维码
zhangshengli
3 months ago
parent
749aa3a368
commit
ab29031188
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package cn.iocoder.yudao.framework.common.util.qccode;
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import cn.hutool.core.util.StrUtil;
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import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
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import com.google.zxing.common.BitMatrix;
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import com.google.zxing.common.HybridBinarizer;
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import com.google.zxing.qrcode.QRCodeReader;
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import com.google.zxing.qrcode.QRCodeWriter;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.yaml.snakeyaml.reader.ReaderException;
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import javax.imageio.ImageIO;
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import java.awt.*;
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import java.awt.image.BufferedImage;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.util.HashMap;
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/**
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* 二维码生成工具类
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*
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* Created by FSQ
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* CopyRight https://www.huamar.com
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*/
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public class QRCodeUtil {
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public static final Logger logger = LoggerFactory.getLogger(QRCodeUtil.class);
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/**
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* 生成包含字符串信息的二维码图片
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*
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* @param outputStream 文件输出流路径
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* @param content 二维码携带信息
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* @param width 宽度
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* @param height 高度
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* @param imageFormat 二维码的格式
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* @param resource 原图
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*/
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public static boolean createQrCode(OutputStream outputStream, String content, int width, int height, String imageFormat, String resource) {
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//设置二维码纠错级别
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HashMap<EncodeHintType, String> hints = new HashMap<EncodeHintType, String>();
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hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
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/* width = width ;
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height = height ;*/
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try {
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//创建比特矩阵(位矩阵)的QR码编码的字符串
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QRCodeWriter qrCodeWriter = new QRCodeWriter();
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BitMatrix byteMatrix = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hints);
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// 使BufferedImage勾画QRCode (matrixWidth 是行二维码像素点)
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int matrixWidth = byteMatrix.getWidth();
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BufferedImage image = new BufferedImage(matrixWidth - 200, matrixWidth - 200, BufferedImage.TYPE_INT_RGB);
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// 使用比特矩阵画并保存图像
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image.createGraphics();
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Graphics2D graphics = (Graphics2D) image.getGraphics();
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graphics.setColor(Color.WHITE);
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graphics.fillRect(0, 0, matrixWidth, matrixWidth);
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graphics.setColor(Color.BLACK);
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for (int i = 0; i < matrixWidth; i++) {
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for (int j = 0; j < matrixWidth; j++) {
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if (byteMatrix.get(i, j)) {
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graphics.fillRect(i - 100, j - 100, 1, 1);
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}
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}
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}
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if (StrUtil.isNotEmpty(resource)) {
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BufferedImage big = getRemoteBufferedImage(resource);
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BufferedImage small = image;
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Graphics2D g = big.createGraphics();
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// 二维码坐标（默认在右上角）
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int x = big.getWidth() - small.getWidth() - 2;
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int y = 2;
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g.drawImage(small, x, y, small.getWidth(), small.getHeight(), null);
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g.dispose();
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return ImageIO.write(big, imageFormat, outputStream);
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} else {
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return ImageIO.write(image, imageFormat, outputStream);
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}
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} catch (Exception e) {
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logger.error(e.getMessage(), e);
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}
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return false;
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}
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/**
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* 读二维码并输出携带的信息
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*/
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public static void readQrCode(InputStream inputStream) throws IOException {
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//设置二维码纠错级别
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HashMap<DecodeHintType, String> hints = new HashMap<DecodeHintType, String>();
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hints.put(DecodeHintType.CHARACTER_SET, "utf-8");
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//从输入流中获取字符串信息
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BufferedImage image = ImageIO.read(inputStream);
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//将图像转换为二进制位图源
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LuminanceSource source = new BufferedImageLuminanceSource(image);
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BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
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QRCodeReader reader = new QRCodeReader();
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Result result = null;
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try {
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result = reader.decode(bitmap, hints);
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} catch (ReaderException e) {
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logger.error(e.getMessage(), e);
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}
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logger.info(result.getText());
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}
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/**
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* 获取远程网络图片信息
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* @param imageURL
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* @return
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*/
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public static BufferedImage getRemoteBufferedImage(String imageURL) {
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URL url;
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InputStream is = null;
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BufferedImage bufferedImage = null;
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try {
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url = new URL(imageURL);
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is = url.openStream();
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bufferedImage = ImageIO.read(is);
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} catch (MalformedURLException e) {
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e.printStackTrace();
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System.out.println("imageURL: " + imageURL + ",无效!");
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return null;
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} catch (IOException e) {
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e.printStackTrace();
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System.out.println("imageURL: " + imageURL + ",读取失败!");
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return null;
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} finally {
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try {
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if (is!=null) {
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is.close();
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}
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} catch (IOException e) {
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e.printStackTrace();
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System.out.println("imageURL: " + imageURL + ",流关闭异常!");
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return null;
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}
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}
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return bufferedImage;
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}
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}
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@ -0,0 +1,32 @@
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package cn.iocoder.yudao.framework.common.util.qccode.vo;
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import io.swagger.v3.oas.annotations.media.Schema;
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import lombok.Data;
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import lombok.EqualsAndHashCode;
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import lombok.ToString;
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@Schema(description = "QRCodeConfig 二维码 vo")
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@Data
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@EqualsAndHashCode(callSuper = false)
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@ToString(callSuper = true)
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public class QRCodeConfig {
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// 二维码内容
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@Schema(description = "二维码内容", requiredMode = Schema.RequiredMode.REQUIRED,defaultValue = "我是二维码的内容")
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private String content;
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// 二维码的宽度
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@Schema(description = "二维码的宽度", requiredMode = Schema.RequiredMode.REQUIRED,defaultValue = "800")
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private int width;
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// 二维码的高度
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@Schema(description = "二维码的高度", requiredMode = Schema.RequiredMode.REQUIRED,defaultValue = "800")
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private int height;
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// 二维码的图片格式，如"png", "jpg"等
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@Schema(description = "二维码的高度", requiredMode = Schema.RequiredMode.REQUIRED,defaultValue = "png")
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private String imageFormat;
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// 附加资源或相关信息（具体含义根据项目需求定义）
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/*private String resource;*/
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}
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