用zxing生成和解析二维码

package test;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.imageio.ImageIO;
import org.junit.Test;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.Binarizer;
import com.google.zxing.BinaryBitmap;
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.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;

public class Erweima {
    /**
     * 生成二维码
     */
    @Test
    public void create(){
         try {
            String content = "https://www.baidu.com/";//一般放url,比如微信，扫描后直接跳转到指定url链接
             String path = "E:/";//生成的二维码指定一个地方存放
             MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
             Map hints = new HashMap();
             hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
             BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 400, 400,hints);
             File file1 = new File(path,"love.jpg");//生成的二维码名字love.jpg，可以自己指定叫什么名字，以图片的格式
             MatrixToImageWriter.writeToFile(bitMatrix, "jpg", file1);
        } catch (WriterException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    /**
     * 解析二维码
     */
    @Test
    public void get(){
        try {
            MultiFormatReader formatReader = new MultiFormatReader();
            String filePath = "E:/love.jpg";
            File file = new File(filePath);
            BufferedImage image = ImageIO.read(file);;
            LuminanceSource source = new BufferedImageLuminanceSource(image);
            Binarizer  binarizer = new HybridBinarizer(source);
            BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
            Map hints = new HashMap();
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
            Result result = formatReader.decode(binaryBitmap,hints);
            System.out.println("result = "+ result.toString());
            System.out.println("resultFormat = "+ result.getBarcodeFormat());
            System.out.println("resultText = "+ result.getText());
        } catch (NotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

所需jar包：https://files.cnblogs.com/files/fpc-syq/zxing%E7%94%9F%E6%88%90%E4%BA%8C%E7%BB%B4%E7%A0%81%EF%BC%88jdk1.6%E4%B8%8B%E4%BA%B2%E6%B5%8B%E5%8F%AF%E7%94%A8%EF%BC%89.zip

原文地址：https://www.cnblogs.com/fpc-syq/p/8384451.html