利用zxing生成二维码

这是一个测试过得的工具类，拿来可以直接使用。

pom.xml添加

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

工具类

QRCodeUtil

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.HashMap;
import java.util.Hashtable;
import java.util.Map;
import java.util.Random;
import javax.imageio.ImageIO;
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;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 {//没有考虑多线程和并发所以用hashMap就可以了，如果担心可以使用hashtable
//      Map<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();Map<EncodeHintType, Object> hints=new HashMap<EncodeHintType, Object>();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);if (needCompress) { // 压缩LOGOif (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();g.drawImage(image, 0, 0, null); // 绘制缩小后的图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);// String file = new Random().nextInt(99999999)+".jpg";// ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));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);}// 被注释的方法/** public static void encode(String content, String destPath, boolean* needCompress) throws Exception { QRCodeUtil.encode(content, null, destPath,* needCompress); }*/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;Map<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();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));}}

BufferedImageLuminanceSource

import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import com.google.zxing.LuminanceSource;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) {image.setRGB(x, y, 0xFFFFFFFF); // = white}}}this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);this.image.getGraphics().drawImage(image, 0, 0, null);this.left = left;this.top = top;}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;}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;}public boolean isCropSupported() {return true;}public LuminanceSource crop(int left, int top, int width, int height) {return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);}public boolean isRotateSupported() {return true;}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);}}

main 方法测试


public class QrCodeTest {public static void main(String[] args) throws Exception {// 存放在二维码中的内容String text = "https://blog.csdn.net/liuno0";// 嵌入二维码的图片路径String imgPath = "E:/图像/juan_/juan_backup3.jpg";// 生成的二维码的路径及名称String destPath = "D:/liunn/liunn.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);}}

方法经过测试可以生成图片二维码，我放了一个网址，用手机扫描后，直接跳转到该页面。

利用zxing生成二维码相关推荐

Spring Boot电商项目57：订单模块六：【前台：生成支付二维码】接口；（支付url的拼凑；利用zxing生成二维码；二维码图片的存储；真实地址与可访问地址的转换；）
说明: (1)本篇博客主要内容是:开发[前台:生成支付二维码]接口: (2)本篇博客需要注意的点有: ● 支付url的拼凑: ● 利用zxing生成二维码: ● 二维码图片的存储:真实地址与可访问地址 ...
java利用zxing生成二维码
什么是ZXing? ZXing是一个开源的,用Java实现的多种格式的1D/2D条码图像处理库. 利用ZXing这个工具库来生成二维码,具体操作如下: 引入相关资源包 <dependency&g ...
Android利用zxing生成二维码
感谢大佬:https://blog.csdn.net/mountain_hua/article/details/80646089 **gayhub上的zxing可用于生成二维码,识别二维码 gayhu ...
Android利用zxing生成二维码，识别二维码，中间填充图片超详细、超简易教程
gayhub上的zxing可用于生成二维码,识别二维码 gayhub地址:https://github.com/zxing/zxing 此文只是简易教程,文末附有完整代码和demo下载地址,进入正题: ...
Java利用Zxing生成二维码及解析二维码内容
前言 Java 操作二维码的开源项目很多,如 SwetakeQRCode.BarCode4j.Zxing 等等本篇文章是介绍利用Zxing来生成二维码图片在web网页上展示,同时解析二维码图片. Z ...
zxing生成二维码及解析二维码
ZXing生成二维码 1.下载jar https://github.com/ZF520/QRCode/raw/master/zxing/bin/lib/zxing3.3.1.jar 2.生成二维码的函 ...
Zxing生成二维码思路和源码解析
Zxing生成二维码思路和源码解析本博文是一篇介绍google zxing包生成二维码的思路和它的源码的文章. 一.引入如何调用zxing的代码生成一个二维码呢?主要的函数只有一个,如下所示: B ...
（转）ZXing生成二维码和带logo的二维码，模仿微信生成二维码效果
场景:移动支付需要对二维码的生成与部署有所了解,掌握目前主流的二维码生成技术. 1 ZXing 生成二维码首先说下,QRCode是日本人开发的,ZXing是google开发,barcode4j也是老 ...
五十九、使用ZXing生成二维码
@Author:Runsen @Date:2020/7/12 人生最重要的不是所站的位置,而是内心所朝的方向.只要我在每篇博文中写得自己体会,修炼身心:在每天的不断重复学习中,耐住寂寞,练就真功,不畏 ...

利用zxing生成二维码

利用zxing生成二维码相关推荐

最新文章

热门文章