Zxing生成二维码工具类

1. 代码

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.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Hashtable;
import java.util.Random;/*** &＃64;describe: 二维码工具类* &＃64;author:houkai* &＃64;Date: 2018/4/28 16:28* &＃64;version 1.0*/
public class QRCodeUtil {private static final String CHARSET &＃61; "utf-8";private static final String FORMAT &＃61; "JPG";// 二维码尺寸private static final int QRCODE_SIZE &＃61; 300;// LOGO宽度private static final int LOGO_WIDTH &＃61; 60;// LOGO高度private static final int LOGO_HEIGHT &＃61; 60;private static BufferedImage createImage(String content, String logoPath, boolean needCompress) throws Exception {Hashtable hints &＃61; new Hashtable();hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);hints.put(EncodeHintType.CHARACTER_SET, CHARSET);hints.put(EncodeHintType.MARGIN, 1);BitMatrix bitMatrix &＃61; new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE,hints);int width &＃61; bitMatrix.getWidth();int height &＃61; bitMatrix.getHeight();BufferedImage image &＃61; new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);for (int x &＃61; 0; x for (int y &＃61; 0; y 0xFF000000 : 0xFFFFFFFF);}}if (logoPath &＃61;&＃61; null || "".equals(logoPath)) {return image;}// 插入图片QRCodeUtil.insertImage(image, logoPath, needCompress);return image;}/*** 插入LOGO* &＃64;param source 二维码图片* &＃64;param logoPath LOGO图片地址* &＃64;param needCompress 是否压缩* &＃64;throws Exception*/private static void insertImage(BufferedImage source, String logoPath, boolean needCompress) throws Exception {File file &＃61; new File(logoPath);if (!file.exists()) {throw new Exception("logo file not found.");}Image src &＃61; ImageIO.read(new File(logoPath));int width &＃61; src.getWidth(null);int height &＃61; src.getHeight(null);if (needCompress) { // 压缩LOGOif (width > LOGO_WIDTH) {width &＃61; LOGO_WIDTH;}if (height > LOGO_HEIGHT) {height &＃61; LOGO_HEIGHT;}Image image &＃61; src.getScaledInstance(width, height, Image.SCALE_SMOOTH);BufferedImage tag &＃61; new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);Graphics g &＃61; tag.getGraphics();g.drawImage(image, 0, 0, null); // 绘制缩小后的图g.dispose();src &＃61; image;}// 插入LOGOGraphics2D graph &＃61; source.createGraphics();int x &＃61; (QRCODE_SIZE - width) / 2;int y &＃61; (QRCODE_SIZE - height) / 2;graph.drawImage(src, x, y, width, height, null);Shape shape &＃61; new RoundRectangle2D.Float(x, y, width, width, 6, 6);graph.setStroke(new BasicStroke(3f));graph.draw(shape);graph.dispose();}/*** 生成二维码(内嵌LOGO)* 二维码文件名随机&＃xff0c;文件名可能会有重复** &＃64;param content 内容* &＃64;param logoPath LOGO地址* &＃64;param destPath 存放目录* &＃64;param needCompress 是否压缩LOGO* &＃64;throws Exception*/public static String encode(String content, String logoPath, String destPath, boolean needCompress) throws Exception {BufferedImage image &＃61; QRCodeUtil.createImage(content, logoPath, needCompress);mkdirs(destPath);String fileName &＃61; new Random().nextInt(99999999) &＃43; "." &＃43; FORMAT.toLowerCase();ImageIO.write(image, FORMAT, new File(destPath &＃43; "/" &＃43; fileName));return fileName;}/*** 生成二维码(内嵌LOGO)* 调用者指定二维码文件名** &＃64;param content 内容* &＃64;param logoPath LOGO地址* &＃64;param destPath 生成的二维码存放目录* &＃64;param fileName 二维码文件名* &＃64;param needCompress 是否压缩LOGO* &＃64;throws Exception*/public static String encode(String content, String logoPath, String destPath, String fileName, boolean needCompress) throws Exception {BufferedImage image &＃61; QRCodeUtil.createImage(content, logoPath, needCompress);mkdirs(destPath);fileName &＃61; fileName.substring(0, fileName.indexOf(".")>0 ? fileName.indexOf("."):fileName.length()) &＃43; "." &＃43; FORMAT.toLowerCase();ImageIO.write(image, FORMAT, new File(destPath &＃43; "/" &＃43; fileName));return fileName;}/*** 当文件夹不存在时&＃xff0c;mkdirs会自动创建多层目录&＃xff0c;区别于mkdir&＃xff0e;* (mkdir如果父目录不存在则会抛出异常)* &＃64;param destPath 存放目录*/public static void mkdirs(String destPath) {File file &＃61; new File(destPath);if (!file.exists() && !file.isDirectory()) {file.mkdirs();}}/*** 生成二维码(内嵌LOGO)* &＃64;param content 内容* &＃64;param logoPath LOGO地址* &＃64;param destPath 存储地址* &＃64;throws Exception*/public static String encode(String content, String logoPath, String destPath) throws Exception {return QRCodeUtil.encode(content, logoPath, destPath, false);}/*** 生成二维码* &＃64;param content 内容* &＃64;param destPath 存储地址* &＃64;param needCompress 是否压缩LOGO* &＃64;throws Exception*/public static String encode(String content, String destPath, boolean needCompress) throws Exception {return QRCodeUtil.encode(content, null, destPath, needCompress);}/*** 生成二维码* &＃64;param content 内容* &＃64;param destPath 存储地址* &＃64;throws Exception*/public static String encode(String content, String destPath) throws Exception {return QRCodeUtil.encode(content, null, destPath, false);}/*** 生成二维码(内嵌LOGO)* &＃64;param content 内容* &＃64;param logoPath LOGO地址* &＃64;param output 输出流* &＃64;param needCompress 是否压缩LOGO* &＃64;throws Exception*/public static void encode(String content, String logoPath, OutputStream output, boolean needCompress)throws Exception {BufferedImage image &＃61; QRCodeUtil.createImage(content, logoPath, needCompress);ImageIO.write(image, FORMAT, output);}/*** 生成二维码* &＃64;param content 内容* &＃64;param output 输出流* &＃64;throws Exception*/public static void encode(String content, OutputStream output) throws Exception {QRCodeUtil.encode(content, null, output, false);}/*** 解析二维码* &＃64;param file 二维码图片* &＃64;return* &＃64;throws Exception*/public static String decode(File file) throws Exception {BufferedImage image;image &＃61; ImageIO.read(file);if (image &＃61;&＃61; null) {return null;}BufferedImageLuminanceSource source &＃61; new BufferedImageLuminanceSource(image);BinaryBitmap bitmap &＃61; new BinaryBitmap(new HybridBinarizer(source));Result result;Hashtable hints &＃61; new Hashtable();hints.put(DecodeHintType.CHARACTER_SET, CHARSET);result &＃61; new MultiFormatReader().decode(bitmap, hints);String resultStr &＃61; result.getText();return resultStr;}/*** 解析二维码* &＃64;param path 二维码图片地址* &＃64;return* &＃64;throws Exception*/public static String decode(String path) throws Exception {return QRCodeUtil.decode(new File(path));}public static void main(String[] args) throws Exception {String text &＃61; "http://www.lianyinkeji.cn";//含Logo&＃xff0c;指定二维码图片名QRCodeUtil.encode(text, "E:\\codebase\\zxing\\src\\main\\resources\\logo.png", "E:\\", "qrcode", true);//不含Logo//QRCodeUtil.encode(text, null, "e:\\", true);//含Logo&＃xff0c;不指定二维码图片名//QRCodeUtil.encode(text, "e:\\csdn.jpg", "e:\\", true);}}

2. maven依赖

<dependency><groupId>com.google.zxinggroupId><artifactId>coreartifactId><version>3.1.0version>
dependency><dependency><groupId>com.google.zxinggroupId><artifactId>javaseartifactId><version>3.1.0version>
dependency>