[移动开发]【java实现二维码的生成(源码)】

目录

【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) {
                    // = white
                    image.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;
    }


    @Override
    public 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;
    }

    @Override
    public 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;
    }

    @Override
    public boolean isCropSupported() {
        return true;
    }

    @Override
    public LuminanceSource crop(int left, int top, int width, int height) {
        return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);
    }

    @Override
    public boolean isRotateSupported() {
        return true;
    }

    @Override
    public 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LOGO
        if (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LOGO
        Graphics2D 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 {

    @Resource
    private 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
 
	}
 
}