QRCodeUtil.java
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package com.skua.tool.util;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import lombok.SneakyThrows;
import org.springframework.core.io.ClassPathResource;
import org.springframework.util.FileCopyUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import sun.font.FontDesignMetrics;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.font.FontRenderContext;
import java.awt.font.LineMetrics;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
public class QRCodeUtil {
private static final int QRCODE_SIZE = 200; // 二维码尺寸，宽度和高度均是200
private static final Color WHITE = new Color(255, 255, 255);
private static final Color BLACK = new Color(0, 0, 0);
/**
* 默认二维码
* @param data
* @param filePath
* @param fileName
*/
@SneakyThrows
public static String getQRCodeImage(String data, String filePath, String fileName) {
String bizPath = "files";
File file = new File(filePath);
if (!file.exists()) {
file.mkdirs();// 创建文件根目录
}
if (data == null) {
throw new RuntimeException("未包含任何信息");
}
HashMap<EncodeHintType, Object> hints = new HashMap<>();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); //定义内容字符集的编码
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L); //定义纠错等级
hints.put(EncodeHintType.MARGIN, 1);
QRCodeWriter qrCodeWriter = new QRCodeWriter();
BitMatrix bitMatrix = qrCodeWriter.encode(data, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
int width = bitMatrix.getWidth();
int height = bitMatrix.getHeight();
int tempHeight = height;
BufferedImage image = new BufferedImage(width, tempHeight, 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) ? BLACK.getRGB() : WHITE.getRGB());
}
}
File barcodeFile = new File(filePath + File.separator + fileName + ".png");
ImageIO.write(image, "png", barcodeFile);
String dbpath = "qrcode" + File.separator + fileName + ".png";
if (dbpath.contains("\\")) {
dbpath = dbpath.replace("\\", "/");
}
return dbpath;
}
}