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com.yuweix.kuafu.core.io.QrCodeUtil Maven / Gradle / Ivy
package com.yuweix.kuafu.core.io;
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.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Hashtable;
import java.util.Map;
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;
/**
* 二维码工具类
* @author yuwei
*/
public abstract class QrCodeUtil {
private static final String CHARSET = "utf-8";
private static final String DEFAULT_IMAGE_TYPE = "jpg";
/**
* 二维码尺寸
*/
private static final int QRCODE_SIZE = 300;
/**
* Logo宽度
*/
private static final int WIDTH = 60;
/**
* Logo高度
*/
private static final int HEIGHT = 60;
private static BufferedImage createImage(String content, int qrcodeSize, ErrorCorrectionLevel ecLevel, byte[] logoData, boolean compressLogo) {
if (qrcodeSize <= 0) {
qrcodeSize = QRCODE_SIZE;
}
if (ecLevel == null) {
ecLevel = ErrorCorrectionLevel.H;
}
Map hints = new Hashtable();
hints.put(EncodeHintType.ERROR_CORRECTION, ecLevel);
hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
hints.put(EncodeHintType.MARGIN, 0);
try {
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, qrcodeSize, qrcodeSize, hints);
int width = bitMatrix.getWidth();
int height = bitMatrix.getHeight();
BufferedImage qrcodeImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
qrcodeImg.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
}
}
if (logoData == null || logoData.length <= 0) {
return qrcodeImg;
}
/**
* 插入Logo
*/
insertLogo(qrcodeImg, logoData, compressLogo);
return qrcodeImg;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* 插入Logo
* @param qrcodeImg 二维码图片
* @param logoData Logo图片
* @param compressLogo 是否压缩
*/
private static void insertLogo(BufferedImage qrcodeImg, byte[] logoData, boolean compressLogo) {
ByteArrayInputStream logoBais = null;
try {
logoBais = new ByteArrayInputStream(logoData);
Image logoImg = ImageIO.read(logoBais);
int width = logoImg.getWidth(null);
int height = logoImg.getHeight(null);
/**
* 压缩Logo
*/
if (compressLogo) {
if (width > WIDTH) {
width = WIDTH;
}
if (height > HEIGHT) {
height = HEIGHT;
}
Image scaledLogoImg = logoImg.getScaledInstance(width, height, Image.SCALE_SMOOTH);
BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = tag.getGraphics();
/**
* 绘制缩小后的图
*/
g.drawImage(scaledLogoImg, 0, 0, null);
g.dispose();
logoImg = scaledLogoImg;
}
/**
* 插入Logo
*/
Graphics2D graph = qrcodeImg.createGraphics();
int x = (QRCODE_SIZE - width) / 2;
int y = (QRCODE_SIZE - height) / 2;
graph.drawImage(logoImg, 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();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (logoBais != null) {
try {
logoBais.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/**
* 生成二维码
* @param content 内容
*/
public static byte[] encode(String content) {
return encode(content, 0);
}
public static byte[] encode(String content, int qrcodeSize) {
return encode(content, qrcodeSize, DEFAULT_IMAGE_TYPE, null, false);
}
/**
* 生成二维码(内嵌Logo)
* @param content 内容
* @param logoData Logo图片
*/
public static byte[] encode(String content, byte[] logoData) {
return encode(content, logoData, false);
}
public static byte[] encode(String content, String imgType) {
return encode(content, 0, imgType, null, false);
}
/**
* 生成二维码(内嵌Logo)
* @param content 内容
* @param logoData Logo图片
* @param compressLogo 是否压缩Logo
* 返回二维码图片的二进制数据
*/
public static byte[] encode(String content, byte[] logoData, boolean compressLogo) {
return encode(content, 0, DEFAULT_IMAGE_TYPE, logoData, compressLogo);
}
public static byte[] encode(String content, String imgType, byte[] logoData, boolean compressLogo) {
return encode(content, 0, imgType, logoData, compressLogo);
}
public static byte[] encode(String content, int qrcodeSize, String imgType, byte[] logoData, boolean compressLogo) {
return encode(content, qrcodeSize, imgType, ErrorCorrectionLevel.H, logoData, compressLogo);
}
public static byte[] encode(String content, int qrcodeSize, String imgType, ErrorCorrectionLevel ecLevel, byte[] logoData, boolean compressLogo) {
BufferedImage bufImg = createImage(content, qrcodeSize, ecLevel, logoData, compressLogo);
ByteArrayOutputStream baos = null;
byte[] qrcodeData = null;
try {
baos = new ByteArrayOutputStream();
ImageIO.write(bufImg, imgType, baos);
qrcodeData = baos.toByteArray();
} catch (Exception e) {
e.printStackTrace();
} finally {
if(baos != null) {
try {
baos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return qrcodeData;
}
/**
* 解析二维码
* 返回二维码中嵌入的内容
*/
public static String decode(byte[] qrcode) {
ByteArrayInputStream bais = null;
try {
bais = new ByteArrayInputStream(qrcode);
BufferedImage image = ImageIO.read(bais);
if (image == null) {
return null;
}
BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Hashtable hints = new Hashtable();
hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
Result result = new MultiFormatReader().decode(bitmap, hints);
return result.getText();
} catch (Exception e) {
e.printStackTrace();
return null;
} finally {
if(bais != null) {
try {
bais.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
