zxing二维码生成与解析

﹏ヽ暗。殇╰゛Y 2022-05-05 02:28 245阅读 0赞

本文是基于google的zxing简单的生成和解析二维码的demo,直接上代码了

package com.summer.test;
    
    import java.awt.image.BufferedImage;
    import java.io.File;
    import java.io.IOException;
    import java.nio.file.Path;
    import java.util.HashMap;
    import java.util.Map;
    
    import javax.imageio.ImageIO;
    
    import com.google.zxing.BarcodeFormat;
    import com.google.zxing.BinaryBitmap;
    import com.google.zxing.EncodeHintType;
    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;
    
    /**
     * @author summer
     * @version 创建时间：2018年10月17日 下午12:14:43 类说明
     */
    public class QRUtils {
    
    	/**
    	 * @Title: getQRCode
    	 * @Description: TODO(根据指定内容生成二维码)
    	 * @param content(二维码中的内容)
    	 * @param dir(二维码生成的路径)
    	 * @return void    返回类型
    	 * @throws
    	 */
    	public static void getQRCode(String content, String dir) {
    		int width = 300;
    		int height = 300;
    		String format = "png";
    		// content = new String(content.getBytes("UTF-8"), "ISO-8859-1");
    		// 定义二维码的参数
    		HashMap<EncodeHintType, Comparable> map = new HashMap<EncodeHintType, Comparable>();
    		// 设置编码
    		map.put(EncodeHintType.CHARACTER_SET, "utf-8");
    		// 设置纠错等级
    		map.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
    		map.put(EncodeHintType.MARGIN, 2);
    
    		try {
    			// 生成二维码
    			BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, map);
    			Path file = new File(dir+"qrcode.png").toPath();
    			MatrixToImageWriter.writeToPath(bitMatrix, format, file);
    			System.out.println("二维码生成完毕path:" + file.toFile().getPath());
    		} catch (WriterException e) {
    			e.printStackTrace();
    		} catch (IOException e) {
    			e.printStackTrace();
    		}
    	}
    	
    	/**
    	 * @Title: parseQRCode
    	 * @Description: TODO(解析二维码)
    	 * @param filePath
    	 * @return void    返回类型
    	 * @throws
    	 */
    	public static void parseQRCode(String filePath) {
    		try {
                MultiFormatReader multiFormatReader = new MultiFormatReader();
                File file = new File(filePath);
                BufferedImage image = ImageIO.read(file);
                //定义二维码参数
                Map hints = new HashMap();
                hints.put(EncodeHintType.CHARACTER_SET,"utf-8");
    
                //获取读取二维码结果
                BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));
                Result result = multiFormatReader.decode(binaryBitmap, hints);
    
                System.out.println("读取二维码： " + result.toString());
                System.out.println("二维码格式： " + result.getBarcodeFormat());
                System.out.println("二维码内容： " + result.getText());
            } catch (NotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
    	}
    	public static void main(String[] args) {
    		String content="hello world 测试二维码";
    		String path = "D:\\";
    		getQRCode(content, path);
    		parseQRCode(path+"qrcode.png");
    		
    	}
    
    }

下图二维码是上面代码生成的，有兴趣可以拿起你的手机相机扫描就能得到里面的信息是“hello world 测试二维码”这段文字

![70][]

附件是需要的工程和jar

[demo下载包含jar包][demo_jar]

[70]: /images/20220505/a31588ccefdf4b96a12647f728d89c27.png
[demo_jar]: https://download.csdn.net/download/yk614294861/10726581