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com.soento.core.util.ZingUtil Maven / Gradle / Ivy
package com.soento.core.util;
import com.google.zxing.*;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.soento.core.enums.DateFormat;
import com.soento.core.util.zxing.ImageLuminanceSource;
import com.soento.core.util.zxing.ImageWriter;
import com.soento.core.util.zxing.LogoConfig;
import org.apache.commons.codec.Charsets;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Date;
import java.util.EnumMap;
import java.util.Map;
/**
* @author yantao.zeng
*/
public final class ZingUtil {
/**
* 生成二维码的默认边长,因为是正方形的,所以高度和宽度一致
*/
private static final int DEFAULT_LENGTH = 400;
/**
* 生成二维码的格式
*/
private static final String FORMAT = "jpg";
/**
* 根据内容生成二维码数据
*
* @param content 二维码文字内容[为了信息安全性,一般都要先进行数据加密]
* @param length 二维码图片宽度和高度
*/
private static BitMatrix createMatrix(String content, int length) {
Map hints = new EnumMap<>(EncodeHintType.class);
// 设置字符编码
hints.put(EncodeHintType.CHARACTER_SET, Charsets.UTF_8.name());
// 指定纠错等级
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
try {
return new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, length, length, hints);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* 根据指定边长创建生成的二维码
*
* @param content 二维码内容
* @param length 二维码的高度和宽度
* @param logoFile logo 文件对象,可以为空
* @param logoConfig logo 配置,可以为空
* @return 二维码图片的字节数组
*/
public static File create(String content, int length, File logoFile, LogoConfig logoConfig) {
if (logoFile != null && !logoFile.exists()) {
throw new IllegalArgumentException("请提供正确的logo文件!");
}
BitMatrix qrCodeMatrix = createMatrix(content, length);
if (qrCodeMatrix == null) {
return null;
}
try {
File file = File.createTempFile(DateFormat.YYYYMMDDHHMISSMS.instance().format(new Date()) + "QR", "." + FORMAT);
ImageWriter.writeToFile(qrCodeMatrix, FORMAT, file);
if (logoFile != null) {
if (logoConfig == null) {
logoConfig = new LogoConfig();
}
// 添加logo图片, 此处一定需要重新进行读取,而不能直接使用二维码的BufferedImage 对象
BufferedImage img = ImageIO.read(file);
overlapImage(img, FORMAT, file.getAbsolutePath(), logoFile, logoConfig);
}
return file;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* 创建生成二维码图片
*
* @param content 二维码内容
* @param length 二维码的高度和宽度
* @return 二维码图片的字节数组
*/
public static File create(String content, int length) {
return create(content, length, null, null);
}
/**
* 创建生成默认高度(400)的二维码图片
*
* @param content 二维码内容
* @return 二维码图片的字节数组
*/
public static File create(String content) {
return create(content, DEFAULT_LENGTH, null, null);
}
/**
* 将logo添加到二维码中间
*
* @param image 生成的二维码图片对象
* @param imagePath 图片保存路径
* @param logoFile logo文件对象
* @param format 图片格式
*/
private static void overlapImage(BufferedImage image, String format, String imagePath, File logoFile, LogoConfig logoConfig) {
try {
BufferedImage logo = ImageIO.read(logoFile);
Graphics2D g = image.createGraphics();
// 考虑到logo图片贴到二维码中,建议大小不要超过二维码的1/5;
int width = image.getWidth() / logoConfig.getLogoPart();
int height = image.getHeight() / logoConfig.getLogoPart();
// logo起始位置,此目的是为logo居中显示
int x = (image.getWidth() - width) / 2;
int y = (image.getHeight() - height) / 2;
// 绘制图
g.drawImage(logo, x, y, width, height, null);
// 给logo画边框
// 构造一个具有指定线条宽度以及 cap 和 join 风格的默认值的实心 BasicStroke
g.setStroke(new BasicStroke(logoConfig.getBorder()));
g.setColor(logoConfig.getBorderColor());
g.drawRect(x, y, width, height);
g.dispose();
// 写入logo图片到二维码
ImageIO.write(image, format, new File(imagePath));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* 解析二维码
*
* @param file 二维码文件内容
* @return 二维码的内容
*/
public static String decode(File file) {
try {
BufferedImage image = ImageIO.read(file);
LuminanceSource source = new ImageLuminanceSource(image);
Binarizer binarizer = new HybridBinarizer(source);
BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
Map hints = new EnumMap<>(DecodeHintType.class);
hints.put(DecodeHintType.CHARACTER_SET, Charsets.UTF_8.name());
return new MultiFormatReader().decode(binaryBitmap, hints).getText();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}