Java生成二维码

 Java生成带logo的二维码

package com.jhzj.common.utils.qrcode;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import java.util.UUID;

import javax.imageio.ImageIO;

import org.apache.commons.lang3.StringUtils;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**
 * 带logo的二维码
 * @author Administrator
 *
 */
public class QRCodeWithLogoUtils {
	private static final int QRCOLOR = 0xFF000000; // 默认是黑色
	private static final int BGWHITE = 0xFFFFFFFF; // 背景颜色
	
	private static final int WIDTH = 400; // 二维码宽
	private static final int HEIGHT = 400; // 二维码高
	
	//用于设置二维码参数、
	private static  Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>() {
		 private static final long serialVersionUID = 1L;
		 {
			 put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);// 设置QR二维码的纠错级别（H为最高级别）具体级别信息
			 put(EncodeHintType.CHARACTER_SET, "UTF-8");//设置编码方式
			 put(EncodeHintType.MARGIN, 0);
		 }
	};
	
	public static void drawLogoQRCode(File logoFile, File codeFile, String qrUrl, String note) {
		try {
			MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
			BitMatrix bm = multiFormatWriter.encode(qrUrl, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints);
			BufferedImage image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
			
			 // 开始利用二维码数据创建Bitmap图片，分别设为黑（0xFFFFFFFF）白（0xFF000000）两色
			for (int x = 0; x < WIDTH; x++) {
				for (int y = 0; y < HEIGHT; y++) {
					image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE);
				}
			}
			
			int width = image.getWidth();
			int height = image.getHeight();
			if(Objects.nonNull(logoFile) && logoFile.exists()) {
				// 构建绘图对象
				Graphics2D g = image.createGraphics();
				// 读取Logo图片
				BufferedImage logo = ImageIO.read(logoFile);
				// 开始绘制logo图片
				g.drawImage(logo, width * 2 / 5, height * 2 / 5, width * 2 / 10, height * 2 / 10, null);
				g.dispose();
				logo.flush();
			}
			
			// 自定义文本描述
            if (StringUtils.isNotEmpty(note)) {
                // 新的图片，把带logo的二维码下面加上文字
                BufferedImage outImage = new BufferedImage(400, 445, BufferedImage.TYPE_4BYTE_ABGR);
                Graphics2D outg = outImage.createGraphics();
                // 画二维码到新的面板
                outg.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);
                // 画文字到新的面板
                outg.setColor(Color.BLACK);
                outg.setFont(new Font("楷体", Font.BOLD, 30)); // 字体、字型、字号
                int strWidth = outg.getFontMetrics().stringWidth(note);
                if (strWidth > 399) {
                    // //长度过长就截取前面部分
                    // 长度过长就换行
                    String note1 = note.substring(0, note.length() / 2);
                    String note2 = note.substring(note.length() / 2, note.length());
                    int strWidth1 = outg.getFontMetrics().stringWidth(note1);
                    int strWidth2 = outg.getFontMetrics().stringWidth(note2);
                    outg.drawString(note1, 200 - strWidth1 / 2, height + (outImage.getHeight() - height) / 2 + 12);
                    BufferedImage outImage2 = new BufferedImage(400, 485, BufferedImage.TYPE_4BYTE_ABGR);
                    Graphics2D outg2 = outImage2.createGraphics();
                    outg2.drawImage(outImage, 0, 0, outImage.getWidth(), outImage.getHeight(), null);
                    outg2.setColor(Color.BLACK);
                    outg2.setFont(new Font("宋体", Font.BOLD, 30)); // 字体、字型、字号
                    outg2.drawString(note2, 200 - strWidth2 / 2,outImage.getHeight() + (outImage2.getHeight() - outImage.getHeight()) / 2 + 5);
                    outg2.dispose();
                    outImage2.flush();
                    outImage = outImage2;
                } else {
                    outg.drawString(note, 200 - strWidth / 2, height + (outImage.getHeight() - height) / 2 + 12); // 画文字
                }
                outg.dispose();
                outImage.flush();
                image = outImage;
            }
 
            image.flush();
 
            ImageIO.write(image, "png", codeFile); // TODO
			
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	
	 public static void main(String[] args) throws WriterException {
		 //File logoFile = new File("");
		 //logo存放路径
		 File logoFile = new File("D://qRCode/logo.jpg");
		 //生成的二维码存放路径
		 File QrCodeFile = new File("D://qRCode/05.jpg");
		 String url = "name:张三百度一下，你就知道\"百度一下，你就知道\"百度一下，你就知道\"百度一下，你就知道\"百度一下，你就知道\"百度一下，你就知道\"百度一下，你就知道\"";
		 //String url = "https://www.baidu.com/";
		 String note = "百度一下，你就知道";
		 drawLogoQRCode(null, QrCodeFile, url, "");
		// drawLogoQRCode(logoFile, QrCodeFile, url, note);
	 }
	 
}

 Java生成不带logo的二维码

package com.jhzj.common.utils.qrcode;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;

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.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;

public class QRCodeUtils {
	
	/**
	 * 生成二维码（不带logo）
	 * 
	 * @param content 文本
	 * @param request
	 * @return 图片路径
	 * @throws Exception
	 */
	public static String generateQRCode(String content) throws Exception {
		//String basePath = request.getSession().getServletContext().getRealPath("/");
		String basePath = "D://qRCode/";
		File file = new File(basePath);
		if(!file.exists()) {
			file.mkdirs();
		}
		String str = "" + new Date().getTime();
		String path = basePath + str + ".png";
		int width = 200; // 图像宽度
        int height = 200; // 图像高度
        String format = "png";// 图像类型
		
        Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
		hints.put(EncodeHintType.CHARACTER_SET,"UTF-8");
		//生成矩阵
		BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
		Path path1 = Paths.get(path);
		//输出图像
		MatrixToImageWriter.writeToPath(bitMatrix, format, path1);
		return path;
	}
	
	
	/**
	 * 解析二维码
	 * @param path
	 * @return
	 */
	public static String parseQRCode(String path) {
		String content = null;
		BufferedImage image;
		try {
			image = ImageIO.read(new File(path));
			LuminanceSource source = new BufferedImageLuminanceSource(image);
			Binarizer binarizer = new HybridBinarizer(source);
			BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
			Map<DecodeHintType, Object> hints = new HashMap<>();
			hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
			//对图像进行解码
			Result result = new MultiFormatReader().decode(binaryBitmap, hints);
			content = result.getText();
			System.out.println(content);
			
		} catch (IOException e) {
			e.printStackTrace();
		} catch (NotFoundException e) {
			e.printStackTrace();
		}
		
		return content;
	}
	
	public static void main(String[] args) throws Exception {
		
		String pathName = generateQRCode("https://www.baidu.com/");
		System.out.println("============================");
		System.out.println("pathName = " + pathName);
		System.out.println("============================");
		String content = parseQRCode(pathName);
		System.out.println("content = " + content);
		System.out.println("============================");
	}
	
}