参数类：
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;/** * */public class QRCodeParams { private String txt; // 二维码内容 private String qrCodeUrl; // 二维码网络门路 private String logoPath; // logo图片 private Integer width = 300; // 二维码宽度 private Integer height = 300; // 二维码高度 private Integer onColor = 0xFF000000; // 前景色 private Integer offColor = 0xFFFFFFFF; // 背景色 private Integer margin = 1; // 白边大小，取值范畴0~4 private ErrorCorrectionLevel level = ErrorCorrectionLevel.L; // 二维码容错率 public String getTxt() { return txt; } public void setTxt(String txt) { this.txt = txt; } public Integer getWidth() { return width; } public void setWidth(Integer width) { this.width = width; } public Integer getHeight() { return height; } public void setHeight(Integer height) { this.height = height; } public String getQrCodeUrl() { return qrCodeUrl; } public void setQrCodeUrl(String qrCodeUrl) { this.qrCodeUrl = qrCodeUrl; } public String getLogoPath() { return logoPath; } public void setLogoPath(String logoPath) { this.logoPath = logoPath; } public Integer getOnColor() { return onColor; } public void setOnColor(Integer onColor) { this.onColor = onColor; } public Integer getOffColor() { return offColor; } public void setOffColor(Integer offColor) { this.offColor = offColor; } public ErrorCorrectionLevel getLevel() { return level; } public void setLevel(ErrorCorrectionLevel level) { this.level = level; } public Integer getMargin() { return margin; } public void setMargin(Integer margin) { this.margin = margin; }}图标配置类：
import java.awt.BasicStroke;import java.awt.Color;import java.awt.Graphics2D;import java.awt.geom.RoundRectangle2D;import java.awt.image.BufferedImage;import java.io.IOException;import java.net.URL;import java.net.URLConnection;import javax.imageio.ImageIO;/** */public class QRLogoConfig { /** * 设置 logo * * @param matrixImage * 源二维码图片 * @return 返回带有logo的二维码图片 * @throws IOException * @author Administrator sangwenhao */ public BufferedImage LogoMatrix(BufferedImage matrixImage, String logoPath) throws IOException { /** * 读取二维码图片，并构建绘图对象 */ Graphics2D g2 = matrixImage.createGraphics(); int matrixWidth = matrixImage.getWidth(); int matrixHeigh = matrixImage.getHeight(); int num = logoPath.indexOf('/', 8); String u = logoPath.substring(0, num); URL url = new URL(logoPath); URLConnection connection = url.openConnection(); connection.setDoOutput(true); connection.setRequestProperty("referer", u); /** * 读取Logo图片 */ BufferedImage logo = ImageIO.read(connection.getInputStream()); // 开始绘制图片 g2.drawImage(logo, matrixWidth / 5 * 2, matrixHeigh / 5 * 2, matrixWidth / 5, matrixHeigh / 5, null);// 绘制 BasicStroke stroke = new BasicStroke(5, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND); g2.setStroke(stroke);// 设置笔画对象 // 指定弧度的圆角矩形 RoundRectangle2D.Float round = new RoundRectangle2D.Float( matrixWidth / 5 * 2, matrixHeigh / 5 * 2, matrixWidth / 5, matrixHeigh / 5, 20, 20); g2.setColor(Color.white); g2.draw(round);// 绘制圆弧矩形 // 设置logo 有一道灰色边框 BasicStroke stroke2 = new BasicStroke(1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND); g2.setStroke(stroke2);// 设置笔画对象 RoundRectangle2D.Float round2 = new RoundRectangle2D.Float( matrixWidth / 5 * 2 + 2, matrixHeigh / 5 * 2 + 2, matrixWidth / 5 - 4, matrixHeigh / 5 - 4, 20, 20); g2.setColor(new Color(128, 128, 128)); g2.draw(round2);// 绘制圆弧矩形 g2.dispose(); matrixImage.flush(); return matrixImage; }}异样类：
/** * */public class QRParamsException extends Exception { private static final long serialVersionUID = 8837582301762730656L; public QRParamsException() { } // 用来创立无参数对象 public QRParamsException(String message) { // 用来创立指定参数对象 super(message); // 调用超类结构器 }}工具解决类：
import java.awt.Color;import java.awt.Graphics2D;import java.awt.Image;import java.awt.image.BufferedImage;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.IOException;import java.util.Hashtable;import javax.imageio.ImageIO;import org.apache.commons.lang3.StringUtils;import com.google.zxing.BarcodeFormat;import com.google.zxing.EncodeHintType;import com.google.zxing.MultiFormatWriter;import com.google.zxing.common.BitMatrix;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;/** * */public class QRCodeUtil { private static int width = 500; // 二维码宽度 private static int height = 500; // 二维码高度 private static int onColor = 0xFF000000; // 前景色 private static int offColor = 0xFFFFFFFF; // 背景色 private static int margin = 1; // 白边大小，取值范畴0~4 private static ErrorCorrectionLevel level = ErrorCorrectionLevel.L; // 二维码容错率 /** * 生成二维码 * * @param params * QRCodeParams属性：txt、fileName、filePath不得为空； * @throws QRParamsException */ public static ByteArrayOutputStream generateQRImage(QRCodeParams params) throws QRParamsException { if (params == null || params.getTxt() == null) { throw new QRParamsException("参数谬误"); } try { initData(params); String txt = params.getTxt(); if (StringUtils.isNoneBlank(params.getLogoPath())) { return generateQRImage(txt, params.getLogoPath()); } else { return generateQRImage(txt); } } catch (Exception e) { e.printStackTrace(); } return null; } /** * 生成二维码 * * @param txt * //二维码内容 */ public static ByteArrayOutputStream generateQRImage(String txt) { Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>(); // 指定纠错等级 hints.put(EncodeHintType.ERROR_CORRECTION, level); // 指定编码格局 hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); hints.put(EncodeHintType.MARGIN, margin); try { BitMatrix bitMatrix = new MultiFormatWriter().encode(txt, BarcodeFormat.QR_CODE, width, height, hints); BufferedImage image = toBufferedImage(bitMatrix); ByteArrayOutputStream out = new ByteArrayOutputStream(); try { ImageIO.write(image, "PNG", out); return out; } catch (IOException e) { e.printStackTrace(); } } catch (Exception e) { e.printStackTrace(); } return null; } /** * 生成带logo的二维码图片 * * @param txt * //二维码内容 * @param logoPath * //logo相对物理门路 * @throws Exception */ public static ByteArrayOutputStream generateQRImage(String txt, String logoPath) throws Exception { Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>(); // 指定纠错等级,纠错级别（L 7%、M 15%、Q 25%、H 30%） hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); hints.put(EncodeHintType.ERROR_CORRECTION, level); hints.put(EncodeHintType.MARGIN, margin); BitMatrix bitMatrix = new MultiFormatWriter().encode(txt, BarcodeFormat.QR_CODE, width, height, hints); return writeToFile(bitMatrix, logoPath); } /** * * @param matrix * 二维码矩阵相干 * @param format * 二维码图片格式 * @param file * 二维码图片文件 * @param logoPath * logo门路 * @throws IOException */ public static void writeToFile(BitMatrix matrix, String format, File file, String logoPath) throws IOException { BufferedImage image = toBufferedImage(matrix); Graphics2D gs = image.createGraphics(); int ratioWidth = image.getWidth() * 2 / 10; int ratioHeight = image.getHeight() * 2 / 10; // 载入logo Image img = ImageIO.read(new File(logoPath)); int logoWidth = img.getWidth(null) > ratioWidth ? ratioWidth : img .getWidth(null); int logoHeight = img.getHeight(null) > ratioHeight ? ratioHeight : img .getHeight(null); int x = (image.getWidth() - logoWidth) / 2; int y = (image.getHeight() - logoHeight) / 2; gs.drawImage(img, x, y, logoWidth, logoHeight, null); gs.setColor(Color.black); gs.setBackground(Color.WHITE); gs.dispose(); img.flush(); if (!ImageIO.write(image, format, file)) { throw new IOException("Could not write an image of format " + format + " to " + file); } } public static ByteArrayOutputStream writeToFile(BitMatrix matrix, String logoPath) throws IOException { BufferedImage image = toBufferedImage(matrix); // 设置logo图标 QRLogoConfig logoConfig = new QRLogoConfig(); image = logoConfig.LogoMatrix(image, logoPath); ByteArrayOutputStream out = new ByteArrayOutputStream(); try { ImageIO.write(image, "PNG", out); return out; } catch (IOException e) { e.printStackTrace(); } return null; } public static BufferedImage toBufferedImage(BitMatrix matrix) { int width = matrix.getWidth(); int height = matrix.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, matrix.get(x, y) ? onColor : offColor); } } return image; } public static BitMatrix deleteWhite(BitMatrix matrix) { int[] rec = matrix.getEnclosingRectangle(); int resWidth = rec[2] + 1; int resHeight = rec[3] + 1; BitMatrix resMatrix = new BitMatrix(resWidth, resHeight); resMatrix.clear(); for (int i = 0; i < resWidth; i++) { for (int j = 0; j < resHeight; j++) { if (matrix.get(i + rec[0], j + rec[1])) resMatrix.set(i, j); } } return resMatrix; } private static void initData(QRCodeParams params) { if (params.getWidth() != null) { width = params.getWidth(); } if (params.getHeight() != null) { height = params.getHeight(); } if (params.getOnColor() != null) { onColor = params.getOnColor(); } if (params.getOffColor() != null) { offColor = params.getOffColor(); } if (params.getLevel() != null) { level = params.getLevel(); } }}调用：
QRCodeParams qrParams = new QRCodeParams();// url = "http://192.168.1.2:8086/business"; qrParams.setTxt(url); qrParams.setWidth(300); qrParams.setHeight(300); ByteArrayOutputStream out = QRCodeUtil.generateQRImage(qrParams); qrCode = this.uploadService.upload(out,IdUtils.id()+".png");