1.引入maven坐标
<!--二维码生成--> <dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>${zxing-version}</version> </dependency> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>${zxing-version}</version> </dependency>
2.编写工具类
import java.awt.*; import java.awt.geom.AffineTransform; import java.awt.image.AffineTransformOp; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.util.Hashtable; import javax.imageio.ImageIO; import com.deaon.common.util.keygen.IdGeneratorUtil; import com.google.zxing.*; import com.google.zxing.common.BitMatrix; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; public class QRCodeUtils { private static final String CHARSET = "utf-8"; // 图片宽度的一半 private static final int IMAGE_WIDTH = 40; private static final int IMAGE_HEIGHT = 40; private static final int IMAGE_HALF_WIDTH = IMAGE_WIDTH / 2; private static final int FRAME_WIDTH = 2; // 二维码尺寸 private static final int QRCODE_SIZE = 300; // 二维码写码器 private static MultiFormatWriter mutiWriter = new MultiFormatWriter(); public static String encode(String content, InputStream srcImagePath, String destImagePath) throws WriterException { Hashtable<EncodeHintType, Object> 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(); try { String file = IdGeneratorUtil.createId() +".jpg"; //生成图片文件 ImageIO.write(genBarcode(content, width, height, srcImagePath), "jpg", new File(destImagePath+"/"+file)); return file; } catch (IOException e) { e.printStackTrace(); } catch (WriterException e) { e.printStackTrace(); } return null; } private static BufferedImage genBarcode(String content, int width, int height, InputStream srcImagePath) throws WriterException, IOException, WriterException { // 读取源图像 BufferedImage scaleImage = scale(srcImagePath, IMAGE_WIDTH, IMAGE_HEIGHT, true); int[][] srcPixels = new int[IMAGE_WIDTH][IMAGE_HEIGHT]; for (int i = 0; i < scaleImage.getWidth(); i++) { for (int j = 0; j < scaleImage.getHeight(); j++) { srcPixels[i][j] = scaleImage.getRGB(i, j);//图片的像素点 } } //编码 Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>(); hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); // 生成二维码 BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hints); // 二维矩阵转为一维像素数组 int halfW = matrix.getWidth() / 2; int halfH = matrix.getHeight() / 2; int[] pixels = new int[width * height]; for (int y = 0; y < matrix.getHeight(); y++) { for (int x = 0; x < matrix.getWidth(); x++) { // 左上角颜色,根据自己需要调整颜色范围和颜色 if (x > 0 && x < 100 && y > 0 && y < 100) { Color color = new Color(231, 144, 56); int colorInt = color.getRGB(); pixels[y * width + x] = matrix.get(x, y) ? colorInt : 16777215; } // 读取图片 else if (x > halfW - IMAGE_HALF_WIDTH && x < halfW + IMAGE_HALF_WIDTH && y > halfH - IMAGE_HALF_WIDTH && y < halfH + IMAGE_HALF_WIDTH) { pixels[y * width + x] = srcPixels[x - halfW + IMAGE_HALF_WIDTH][y - halfH + IMAGE_HALF_WIDTH]; } // 在图片四周形成边框 else if ((x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH && x < halfW - IMAGE_HALF_WIDTH + FRAME_WIDTH && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH + IMAGE_HALF_WIDTH + FRAME_WIDTH) || (x > halfW + IMAGE_HALF_WIDTH - FRAME_WIDTH && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH + IMAGE_HALF_WIDTH + FRAME_WIDTH) || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH - IMAGE_HALF_WIDTH + FRAME_WIDTH) || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH && y > halfH + IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH + IMAGE_HALF_WIDTH + FRAME_WIDTH)) { pixels[y * width + x] = 0xfffffff; } else { // 二维码颜色（RGB） int num1 = (int) (50 - (50.0 - 13.0) / matrix.getHeight() * (y + 1)); int num2 = (int) (165 - (165.0 - 72.0) / matrix.getHeight() * (y + 1)); int num3 = (int) (162 - (162.0 - 107.0) / matrix.getHeight() * (y + 1)); Color color = new Color(num1, num2, num3); int colorInt = color.getRGB(); // 此处可以修改二维码的颜色，可以分别制定二维码和背景的颜色； pixels[y * width + x] = matrix.get(x, y) ? colorInt : 16777215;// 0x000000:0xffffff } } } BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); image.getRaster().setDataElements(0, 0, width, height, pixels); return image; } /** * 把传入的原始图像按高度和宽度进行缩放，生成符合要求的图标 * * @param srcImageFile * 源文件地址 * @param height * 目标高度 * @param width * 目标宽度 * @param hasFiller * 比例不对时是否需要补白：true为补白; false为不补白; * @throws IOException */ private static BufferedImage scale(InputStream srcImageFile, int height, int width, boolean hasFiller) throws IOException { double ratio = 0.0; // 缩放比例 //File file = srcImageFile; BufferedImage srcImage = ImageIO.read(srcImageFile); Image destImage = srcImage.getScaledInstance(width, height, BufferedImage.SCALE_SMOOTH); // 计算比例 if ((srcImage.getHeight() > height) || (srcImage.getWidth() > width)) { if (srcImage.getHeight() > srcImage.getWidth()) { ratio = (new Integer(height)).doubleValue() / srcImage.getHeight(); } else { ratio = (new Integer(width)).doubleValue() / srcImage.getWidth(); } AffineTransformOp op = new AffineTransformOp( AffineTransform.getScaleInstance(ratio, ratio), null); destImage = op.filter(srcImage, null); } if (hasFiller) {// 补白 BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D graphic = image.createGraphics(); graphic.setColor(Color.white); graphic.fillRect(0, 0, width, height); if (width == destImage.getWidth(null)) graphic.drawImage(destImage, 0, (height - destImage.getHeight(null)) / 2, destImage.getWidth(null), destImage.getHeight(null), Color.white, null);//画图片 else graphic.drawImage(destImage, (width - destImage.getWidth(null)) / 2, 0, destImage.getWidth(null), destImage.getHeight(null), Color.white, null); graphic.dispose(); destImage = image; } return (BufferedImage) destImage; } public static void main(String[] args) throws Exception { /* InputStream url = getClass().getClassLoader().getResourceAsStream("logo/logo.png"); //本地生成二维码图片 String file = QRCodeUtils.encode(newsLink + "?origin=1&user=" + encryptHex, url,destPath);*/ } }