Java生成二维码之zxing
0
pom.xml
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.2.1</version>
</dependency>
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.2.1</version>
</dependency>
代码
package com.acgist.qrcode;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;
import javax.imageio.ImageIO;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import com.acgist.logger.Logger;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.Binarizer;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.NotFoundException;
import com.google.zxing.Result;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
/**
* 二维码工具
*/
public class QRCodeUtils {
public static final void main(String[] args) {
long b = System.currentTimeMillis();
encode("https://www.baidu.com", 300, 300, 1, "D:\\yy.png", "D:\\code.png");
// System.out.println(decode("D:\\code.png"));
long e = System.currentTimeMillis();
System.out.println(e - b);
}
private final static int LOGO_MAX_WH = 40; // LOGO最大高宽
/**
* 生成二维码
*
* @param content 图片地址
* @param width 图片宽度
* @param height 图片高度
* @param margin 边距：小于表示默认
* @param codePath 输出地址
*/
public static final void encode(String content, int width, int height, int margin, String codePath) {
encode(content, width, height, margin, null, null, null, codePath);
}
/**
* 生成二维码
*
* @param content 图片地址
* @param width 图片宽度
* @param height 图片高度
* @param margin 边距：小于表示默认
* @param os 输出流
*/
public static final void encode(String content, int width, int height, int margin, OutputStream os) {
encode(content, width, height, margin, null, null, null, os);
}
/**
* 生成二维码
*
* @param content 图片地址
* @param width 图片宽度
* @param height 图片高度
* @param margin 边距：小于表示默认
* @param logoPath logo地址：可以为空
* @param codePath 输出地址
*/
public static final void encode(String content, int width, int height, int margin, String logoPath, String codePath) {
encode(content, width, height, margin, null, null, logoPath, codePath);
}
/**
* 生成二维码
*
* @param content 图片地址
* @param width 图片宽度
* @param height 图片高度
* @param margin 边距：小于表示默认
* @param logoPath logo地址：可以为空
* @param os 输出流
*/
public static final void encode(String content, int width, int height, int margin, String logoPath, OutputStream os) {
encode(content, width, height, margin, null, null, logoPath, os);
}
/**
* 生成二维码
*
* @param content 图片地址
* @param width 图片宽度
* @param height 图片高度
* @param margin 边距：小于0表示默认
* @param level 容错率：可以为空
* @param charset 编码：默认UTF-8
* @param logoPath logo地址：可以为空
* @param codePath 输出地址
*/
public static final void encode(String content, int width, int height, int margin, ErrorCorrectionLevel level, String charset, String logoPath, String codePath) {
if (StringUtils.isEmpty(codePath)) {
return;
}
OutputStream os = null;
try {
os = new FileOutputStream(new File(codePath));
encode(content, width, height, margin, level, charset, logoPath, os);
} catch (FileNotFoundException e) {
Logger.error(QRCodeUtils.class, "打开输出流错误", e);
} finally {
IOUtils.closeQuietly(os);
}
}
/**
* 生成二维码
*
* @param content 图片地址
* @param width 图片宽度
* @param height 图片高度
* @param margin 边距：小于0表示默认
* @param level 容错率：可以为空
* @param charset 编码：默认UTF-8
* @param logoPath logo地址：可以为空
* @param os 输出流
*/
public static final void encode(String content, int width, int height, int margin, ErrorCorrectionLevel level, String charset, String logoPath, OutputStream os) {
if (StringUtils.isEmpty(content) || os == null) {
return;
}
Graphics2D graphics2d = null;
BufferedImage logoImage = null;
BufferedImage codeImage = null;
try {
Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
if (margin >= 0) {
hints.put(EncodeHintType.MARGIN, margin); // 边距
}
if (level != null) {
hints.put(EncodeHintType.ERROR_CORRECTION, level); // 容错率
}
if (StringUtils.isNotEmpty(charset)) {
hints.put(EncodeHintType.CHARACTER_SET, charset); // 编码
} else {
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); // 编码
}
MultiFormatWriter formatWriter = new MultiFormatWriter();
BitMatrix bitMatrix = formatWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hints);
codeImage = MatrixToImageWriter.toBufferedImage(bitMatrix);
// graphics2d = codeImage.createGraphics();
BufferedImage target = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); // 设置ARGB颜色
graphics2d = target.createGraphics();
graphics2d.drawImage(codeImage, 0, 0, null); // 画二维码
if (StringUtils.isNotEmpty(logoPath)) { // 画logo
logoImage = ImageIO.read(new File(logoPath));
int logoWidth = logoImage.getWidth() > LOGO_MAX_WH ? LOGO_MAX_WH : logoImage.getWidth();
int logoHeight = logoImage.getHeight() > LOGO_MAX_WH ? LOGO_MAX_WH : logoImage.getHeight();
int marginLeft = (width - logoWidth) / 2;
int marginTop = (height - logoHeight) / 2;
graphics2d.drawImage(logoImage.getScaledInstance(logoWidth, logoHeight, Image.SCALE_SMOOTH), marginLeft, marginTop, null);
}
target.flush();
ImageIO.write(target, "png", os);
} catch (WriterException e) {
Logger.error(QRCodeUtils.class, "二维码生成错误", e);
} catch (IOException e) {
Logger.error(QRCodeUtils.class, "二维码生成错误", e);
} finally {
if (graphics2d != null) {
graphics2d.dispose();
}
}
}
/**
* 解析二维码
*
* @param codePath 图片地址
* @return 内容
*/
public static final String decode(String codePath) {
return decode(codePath, null);
}
/**
* 解析二维码
*
* @param codePath 图片地址
* @param charset 编码
* @return 内容
*/
public static final String decode(String codePath, String charset) {
if (StringUtils.isEmpty(codePath)) {
return null;
}
File file = new File(codePath);
if (!file.exists() || !file.isFile()) {
return null;
}
BufferedImage image;
try {
image = ImageIO.read(file);
return decode(image, charset);
} catch (IOException e) {
Logger.error(QRCodeUtils.class, "二维码图片文件读取错误", e);
}
return null;
}
/**
* 二维码解析
*
* @param image 图片流
* @param charset 编码
* @return 内容
*/
public static final String decode(BufferedImage image, String charset) {
MultiFormatReader formatReader = new MultiFormatReader();
LuminanceSource source = new BufferedImageLuminanceSource(image);
Binarizer binarizer = new HybridBinarizer(source);
BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();
if (StringUtils.isEmpty(charset)) {
hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
} else {
hints.put(DecodeHintType.CHARACTER_SET, charset);
}
Result result = null;
try {
result = formatReader.decode(binaryBitmap, hints);
return result.getText();
} catch (NotFoundException e) {
Logger.error(QRCodeUtils.class, "二维码解析错误", e);
}
return null;
}
}