Java实现创建和解析带图标的二维码
二维码工具类
用到的jar包：
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>${zxingcore.version}</version>
</dependency>
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>${zxingse.version}</version>
</dependency>
代码：
package com.util.qrcode;
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.NotFoundException;
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 java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
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 javax.imageio.ImageIO;
/**
* <p>Description: 二维码工具类</p>
* <p>Copyright: Copyright (c) 2020</p>
* @author ZhangLang
* Create Time: 2020年1月15日 上午11:18:34
*/
public class QRCodeUtil {
private static final String CHARSET = "utf-8";
private static final String FORMAT_NAME = "jpg";
// 二维码尺寸，像素
private int QRCODE_SIZE = 500;
// LOGO尺寸，像素
private int LOGO_SIZE = 166;
//背景色白色
private int offColor = 0xFFFFFFFF;
//前景色，默认黑色
private int onColor = 0xFF000000;
/**
* 设置二维码颜色
* @param onColor 16进制颜色，例如：0xFF000000，0xFF为前缀，000000为16进制颜色
*/
public void setOnColor(int onColor) {
this.onColor = onColor;
}
/**
* 设置二维码大小，默认500
* @param qRCODE_SIZE 像素
*/
public void setQRCodeSize(int qRCODE_SIZE) {
QRCODE_SIZE = qRCODE_SIZE;
}
/**
* 设置二维码logo大小， 默认166
* @param lOGO_SIZE 像素
*/
public void setLogoSize(int lOGO_SIZE) {
LOGO_SIZE = lOGO_SIZE;
}
/**
* Description: 创建文件夹， 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)
* Create Time: 2020年1月15日 上午11:34:10
* @author ZhangLang
* @param destPath
*/
private File mkdirs(String destPath) {
File file = new File(destPath);
if (!file.exists() && !file.isDirectory()) {
file.mkdirs();
}
return file;
}
/**
* Description: 生成二维码图片，并嵌入二维码logo
* @param content 二维码内容
* @param imgPath 嵌入logo图片路径
* @return
* @throws Exception
*/
private BufferedImage createImage(String content, String imgPath)
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, 0);
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) ? onColor : offColor);
}
}
if ((imgPath == null) || "".equals(imgPath)) {
return image;
}
// 插入图片
this.insertImage(image, imgPath, true);
return image;
}
/**
* Description: 向二维码中插入logo
* @param source 二维码图片
* @param imgPath logo路径
* @param needCompress 是否需要压缩logo
* @throws Exception
*/
private void insertImage(BufferedImage source, String imgPath,
boolean needCompress) throws Exception {
File file = new File(imgPath);
if (!file.exists()) {
return;
}
Image src = ImageIO.read(new File(imgPath));
int width = src.getWidth(null);
int height = src.getHeight(null);
if (needCompress) { // 压缩LOGO
// logo图片不要超过二维码尺寸的50%
if ((QRCODE_SIZE / 2.5) < LOGO_SIZE) {
LOGO_SIZE = (int) (QRCODE_SIZE / 2.5);
}
width = LOGO_SIZE;
height = LOGO_SIZE;
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LOGO
Graphics2D graph = source.createGraphics();
//给graph带上反锯齿属性
graph.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
graph.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
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();
}
/**
* Description: 生成带logo二维码
* @param content 内容
* @param imgPath logo图片路径
* @param destPath 二维码图片存储路径
* @throws Exception
*/
public File encode(String content, String imgPath, String destPath) {
File file = null;
try {
BufferedImage image = this.createImage(content, imgPath);
file = mkdirs(destPath);
ImageIO.write(image, FORMAT_NAME, file);
} catch (Exception e) {
e.printStackTrace();
}
return file;
}
/**
* Description: 生成普通二维码
* @param content 内容
* @param destPath 二维码图片存储路径
* @return
* @throws Exception
*/
public File encode(String content, String destPath) {
return this.encode(content, null, destPath);
}
/**
* Description: 生成带logo二维码并写入output
* @param content 内容
* @param imgPath logo图片路径
* @param output
* @throws Exception
*/
public void encode(String content, String imgPath, OutputStream output) {
try {
BufferedImage image = this.createImage(content, imgPath);
ImageIO.write(image, FORMAT_NAME, output);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Description: 生成普通二维码并写入output
* @param content 内容
* @param output
* @throws Exception
*/
public void encode(String content, OutputStream output) {
this.encode(content, null, output);
}
/**
* Description: 解析二维码内容
* @param file 二维码图片文件
* @return
* @throws Exception
*/
public String decode(File file) {
String resultStr = "";
try {
BufferedImage image = ImageIO.read(file);
if (image == null) {
return resultStr;
}
BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Hashtable<DecodeHintType, String> hints = new Hashtable<DecodeHintType, String>();
hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
try {
Result result = new MultiFormatReader().decode(bitmap, hints);
resultStr = result.getText();
} catch (NotFoundException e) {
//没有读取到二维码内容
e.printStackTrace();
}
} catch (Exception e) {
e.printStackTrace();
}
return resultStr;
}
/**
* Description: 解析二维码内容
* @param path 二维码图片路径
* @return
* @throws Exception
*/
public String decode(String path) {
File file = new File(path);
if (!file.exists()) {
return "";
}
return this.decode(file);
}
public static void main(String[] args) {
String logoPath = "E:\\qrCode\\saif-icon.png";
String content = "4004378093";
QRCodeUtil qrCodeUtil = new QRCodeUtil();
qrCodeUtil.setOnColor(0xFF333333);
qrCodeUtil.setLogoSize(166);
File file = qrCodeUtil.encode(content, logoPath,
"E:\\qrCode\\qrcode\\qrcode3.png");
String qrcodePath = file.getAbsolutePath();
System.out.println("-->" + qrcodePath);
String result = qrCodeUtil.decode(qrcodePath);
System.out.println("--->" + result);
}
}
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