一、pom.xml添加依賴

<dependency><groupId>com.google.zxing</groupId><artifactId>core</artifactId><version>3.1.0</version></dependency><dependency><groupId>com.google.zxing</groupId><artifactId>javase</artifactId><version>3.1.0</version></dependency>

二、二維碼工具類

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 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.client.j2se.BufferedImageLuminanceSource; import com.google.zxing.common.BitMatrix; import com.google.zxing.common.HybridBinarizer; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;/*** 二維碼工具類**/ public class QRCodeUtil {private static final String CHARSET = "utf-8";private static final String FORMAT = "JPG";// 二維碼尺寸private static final int QRCODE_SIZE = 300;// LOGO寬度private static final int LOGO_WIDTH = 60;// LOGO高度private static final int LOGO_HEIGHT = 60;private static BufferedImage createImage(String content, String logoPath, boolean needCompress) throws Exception {Hashtable<EncodeHintType, Object> hints = new Hashtable<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 (logoPath == null || "".equals(logoPath)) {return image;}// 插入圖片QRCodeUtil.insertImage(image, logoPath, needCompress);return image;}/*** 插入LOGO** @param source* 二維碼圖片* @param logoPath* LOGO圖片地址* @param needCompress* 是否壓縮* @throws Exception*/private static void insertImage(BufferedImage source, String logoPath, boolean needCompress) throws Exception {File file = new File(logoPath);if (!file.exists()) {throw new Exception("logo file not found.");}Image src = ImageIO.read(new File(logoPath));int width = src.getWidth(null);int height = src.getHeight(null);if (needCompress) { // 壓縮LOGOif (width > LOGO_WIDTH) {width = LOGO_WIDTH;}if (height > LOGO_HEIGHT) {height = LOGO_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); // 繪制縮小后的圖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();}/*** 生成二維碼(內嵌LOGO)* 二維碼文件名隨機，文件名可能會有重復** @param content* 內容* @param logoPath* LOGO地址* @param destPath* 存放目錄* @param needCompress* 是否壓縮LOGO* @throws Exception*/public static String encode(String content, String logoPath, String destPath, boolean needCompress) throws Exception {BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress);mkdirs(destPath);String fileName = new Random().nextInt(99999999) + "." + FORMAT.toLowerCase();ImageIO.write(image, FORMAT, new File(destPath + "/" + fileName));return fileName;}/*** 生成二維碼(內嵌LOGO)* 調用者指定二維碼文件名** @param content* 內容* @param logoPath* LOGO地址* @param destPath* 存放目錄* @param fileName* 二維碼文件名* @param needCompress* 是否壓縮LOGO* @throws Exception*/public static String encode(String content, String logoPath, String destPath, String fileName, boolean needCompress) throws Exception {BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress);mkdirs(destPath);fileName = fileName.substring(0, fileName.indexOf(".")>0?fileName.indexOf("."):fileName.length())+ "." + FORMAT.toLowerCase();ImageIO.write(image, FORMAT, new File(destPath + "/" + fileName));return fileName;}/*** 當文件夾不存在時，mkdirs會自動創建多層目錄，區別于mkdir．* (mkdir如果父目錄不存在則會拋出異常)* @param destPath* 存放目錄*/public static void mkdirs(String destPath) {File file = new File(destPath);if (!file.exists() && !file.isDirectory()) {file.mkdirs();}}/*** 生成二維碼(內嵌LOGO)** @param content* 內容* @param logoPath* LOGO地址* @param destPath* 存儲地址* @throws Exception*/public static String encode(String content, String logoPath, String destPath) throws Exception {return QRCodeUtil.encode(content, logoPath, destPath, false);}/*** 生成二維碼** @param content* 內容* @param destPath* 存儲地址* @param needCompress* 是否壓縮LOGO* @throws Exception*/public static String encode(String content, String destPath, boolean needCompress) throws Exception {return QRCodeUtil.encode(content, null, destPath, needCompress);}/*** 生成二維碼** @param content* 內容* @param destPath* 存儲地址* @throws Exception*/public static String encode(String content, String destPath) throws Exception {return QRCodeUtil.encode(content, null, destPath, false);}/*** 生成二維碼(內嵌LOGO)** @param content* 內容* @param logoPath* LOGO地址* @param output* 輸出流* @param needCompress* 是否壓縮LOGO* @throws Exception*/public static void encode(String content, String logoPath, OutputStream output, boolean needCompress)throws Exception {BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress);ImageIO.write(image, FORMAT, output);}/*** 生成二維碼** @param content* 內容* @param output* 輸出流* @throws Exception*/public static void encode(String content, OutputStream output) throws Exception {QRCodeUtil.encode(content, null, output, false);}/*** 解析二維碼** @param file* 二維碼圖片* @return* @throws Exception*/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<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;}/*** 解析二維碼** @param path* 二維碼圖片地址* @return* @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 = "https://chengchong.blog.csdn.net/article/details/96350925";//不含Logo//QRCodeUtil.encode(text, null, "e:\\", true);//含Logo，不指定二維碼圖片名//QRCodeUtil.encode(text, "e:\\csdn.jpg", "e:\\", true);//含Logo，指定二維碼圖片名QRCodeUtil.encode(text, "C:\\Users\\cc\\Desktop\\logo.png", "C:\\Users\\cc\\Desktop\\", "qrcode", true);} }

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