【java实现二维码的生成(源码)】

【复制即用】实现通过扫描生成的二维码跳转到指定网页，也可实现扫描二维码显示文本或图片

1.0.导入依赖坐标

1.1.工具类

1.2.入参类

1.3.controller层

1.4.service层

1.5.业务逻辑处理层

1.6 测试示例

【复制即用】实现通过扫描生成的二维码跳转到指定网页，也可实现扫描二维码显示文本或图片

1.0.导入依赖坐标

<dependency><groupId>com.google.zxing</groupId><artifactId>core</artifactId><version>3.3.0</version>
</dependency>

1.1.1导入谷歌提供的帮助类(前置)

import com.google.zxing.LuminanceSource;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;/*** 二维码生成解析帮助(二维码图片缓存)类** @Author 周兆宇* @Date 2022-01-21 14:17:01*/
public class BufferedImageLuminanceSource extends LuminanceSource {private final BufferedImage image;private final int left;private final int top;public BufferedImageLuminanceSource(BufferedImage image) {this(image, 0, 0, image.getWidth(), image.getHeight());}public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {super(width, height);int sourceWidth = image.getWidth();int sourceHeight = image.getHeight();if (left + width > sourceWidth || top + height > sourceHeight) {throw new IllegalArgumentException("Crop rectangle does not fit within image data.");}for (int y = top; y < top + height; y++) {for (int x = left; x < left + width; x++) {if ((image.getRGB(x, y) & 0xFF000000) == 0) {// = whiteimage.setRGB(x, y, 0xFFFFFFFF);}}}this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);this.image.getGraphics().drawImage(image, 0, 0, null);this.left = left;this.top = top;}@Overridepublic byte[] getRow(int y, byte[] row) {if (y < 0 || y >= getHeight()) {throw new IllegalArgumentException("Requested row is outside the image: " + y);}int width = getWidth();if (row == null || row.length < width) {row = new byte[width];}image.getRaster().getDataElements(left, top + y, width, 1, row);return row;}@Overridepublic byte[] getMatrix() {int width = getWidth();int height = getHeight();int area = width * height;byte[] matrix = new byte[area];image.getRaster().getDataElements(left, top, width, height, matrix);return matrix;}@Overridepublic boolean isCropSupported() {return true;}@Overridepublic LuminanceSource crop(int left, int top, int width, int height) {return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);}@Overridepublic boolean isRotateSupported() {return true;}@Overridepublic LuminanceSource rotateCounterClockwise() {int sourceWidth = image.getWidth();int sourceHeight = image.getHeight();AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth);BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY);Graphics2D g = rotatedImage.createGraphics();g.drawImage(image, transform, null);g.dispose();int width = getWidth();return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width);}}

1.1.工具类

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Hashtable;
import javax.imageio.ImageIO;/*** 二维码生成解析工具类** @Author 周兆宇* @Date 2022-01-21 14:17:01*/
public class QrCodeUtil {private static final String CHARSET = "utf-8";private static final String FORMAT_NAME = "JPG";// 二维码尺寸private static final int QRCODE_SIZE = 300;// LOGO宽度private static final int WIDTH = 60;// LOGO高度private static final int HEIGHT = 60;private static BufferedImage createImage(String content, String imgPath, boolean needCompress) throws Exception {Hashtable hints = new Hashtable();hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);hints.put(EncodeHintType.CHARACTER_SET, CHARSET);hints.put(EncodeHintType.MARGIN, 1);BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE,hints);int width = bitMatrix.getWidth();int height = bitMatrix.getHeight();BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);for (int x = 0; x < width; x++) {for (int y = 0; y < height; y++) {image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);}}if (imgPath == null || "".equals(imgPath)) {return image;}// 插入图片QrCodeUtil.insertImage(image, imgPath, needCompress);return image;}private static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception {File file = new File(imgPath);if (!file.exists()) {System.err.println("" + imgPath + "   该文件不存在！");return;}Image src = ImageIO.read(new File(imgPath));int width = src.getWidth(null);int height = src.getHeight(null);// 压缩LOGOif (needCompress) {if (width > WIDTH) {width = WIDTH;}if (height > HEIGHT) {height = HEIGHT;}Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);Graphics g = tag.getGraphics();// 绘制缩小后的图g.drawImage(image, 0, 0, null);g.dispose();src = image;}// 插入LOGOGraphics2D graph = source.createGraphics();int x = (QRCODE_SIZE - width) / 2;int y = (QRCODE_SIZE - height) / 2;graph.drawImage(src, x, y, width, height, null);Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);graph.setStroke(new BasicStroke(3f));graph.draw(shape);graph.dispose();}public static void encode(String content, String imgPath, String destPath, boolean needCompress) throws Exception {BufferedImage image = QrCodeUtil.createImage(content, imgPath, needCompress);mkdirs(destPath);ImageIO.write(image, FORMAT_NAME, new File(destPath));}public static BufferedImage encode(String content, String imgPath, boolean needCompress) throws Exception {BufferedImage image = QrCodeUtil.createImage(content, imgPath, needCompress);return image;}public static void mkdirs(String destPath) {File file = new File(destPath);// 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)if (!file.exists() && !file.isDirectory()) {file.mkdirs();}}public static void encode(String content, String imgPath, String destPath) throws Exception {QrCodeUtil.encode(content, imgPath, destPath, false);}public static void encode(String content, String destPath) throws Exception {QrCodeUtil.encode(content, null, destPath, false);}public static void encode(String content, String imgPath, OutputStream output, boolean needCompress)throws Exception {BufferedImage image = QrCodeUtil.createImage(content, imgPath, needCompress);ImageIO.write(image, FORMAT_NAME, output);}public static void encode(String content, OutputStream output) throws Exception {QrCodeUtil.encode(content, null, output, false);}public static String decode(File file) throws Exception {BufferedImage image;image = ImageIO.read(file);if (image == null) {return null;}BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));Result result;Hashtable hints = new Hashtable();hints.put(DecodeHintType.CHARACTER_SET, CHARSET);result = new MultiFormatReader().decode(bitmap, hints);String resultStr = result.getText();return resultStr;}public static String decode(String path) throws Exception {return QrCodeUtil.decode(new File(path));}}

1.2.入参类

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import java.io.Serializable;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;/*** @Description: 生成二维码入参类* @Author: 周兆宇* @Date: 2022-01-24 16:57:08*/
@AllArgsConstructor
@NoArgsConstructor
@Builder
@Data
@ApiModel("生成二维码入参类")
public class QrCodeReq implements Serializable {private static final long serialVersionUID = -3535741618235811221L;@ApiModelProperty("存放在二维码中的内容(全地址路径)")private String text;@ApiModelProperty("生成的二维码的路径及名称")private String destPath;
}

1.3.controller层

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import javax.annotation.Resource;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;/*** @Description: 二维码生成解析控制层* @Author: 周兆宇* @Date: 2022-01-24 17:01:22*/
@RestController
@Slf4j
@Api(tags = "二维码生成解析API")
@RequestMapping("/qrCode")
public class QrCodeController {@Resourceprivate QrCodeFacade qrCodeService;@ApiOperation(value = "二维码生成与解析")@PostMapping("/buildQrCode")public Result buildQrCode(@RequestBody QrCodeReq qrCodeReq) {return qrCodeService.buildQrCode(qrCodeReq);}}

1.4.service层

/*** @Description: 二维码生成解析服务接口* @Author: 周兆宇* @Date: 2022-01-24 17:04:14*/
public interface QrCodeFacade {/*** 功能描述: 二维码生成并解析** @param qrCodeReq* @return com.dianliantech.common.model.Result* @author 周兆宇* @date 2022-01-24 17:12:44*/Result buildQrCode(QrCodeReq qrCodeReq);
}

1.5.业务逻辑处理层

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;/*** @Description: 二维码生成解析逻辑处理层* @Author: 周兆宇* @Date: 2022-01-24 17:34:05*/
@Component
@Slf4j
public class QrCommand {/*** 功能描述: 生成和解析二维码** @param qrCodeReq* @return Result* @author 周兆宇* @date 2022-01-24 17:42:24*/public Result buildQrCode(QrCodeReq qrCodeReq) {try {// 生成二维码        二维码内容    嵌入二维码的图片路径;  图片存储路径;    是否将嵌入二维码的图片进行压缩QrCodeUtil.encode(qrCodeReq.getText(), null, qrCodeReq.getDestPath(),false);// 解析二维码(传入要解析的二维码地址即可)QrCodeUtil.decode(qrCodeReq.getDestPath());// 返回二维码存放路径return Result.succeed(qrCodeReq.getDestPath());} catch (Exception e) {return Result.failed(e.toString());}}
}

1.6 测试示例


public class QrCodeTest {public static void main(String[] args) throws Exception {// 存放在二维码中的内容String text = "文本内容/需要扫描后跳转的全路径地址";// 嵌入二维码的图片路径String imgPath = "D:/qrCode/1.jpg";// 生成的二维码的路径及名称String destPath = "D:/qrCode/qrcode/test.jpg";//生成二维码QRCodeUtil.encode(text, imgPath, destPath, true);// 解析二维码String str = QRCodeUtil.decode(destPath);// 打印出解析出的内容System.out.println(str);  //： 文本内容/路径地址}}

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【java实现二维码的生成(源码)】

【复制即用】实现通过扫描生成的二维码跳转到指定网页，也可实现扫描二维码显示文本或图片

1.0.导入依赖坐标

1.1.工具类

1.2.入参类

1.3.controller层

1.4.service层

1.5.业务逻辑处理层

1.6 测试示例

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