JavaUtil_02_二维码的生成与解析

1.引入jar包

 zxing-core-1.7.jar  ：   http://viralpatel.net/blogs/download/jar/zxing-core-1.7.jar

 zxing-javase-1.7.jar ：  http://viralpatel.net/blogs/download/jar/zxing-j2se-1.7.jar

2.工具类—QRCodeUtil.java

package com.ray.util;

import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Hashtable;
import java.util.Random;
import javax.imageio.ImageIO;

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.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 QRCodeUtil {

    /**
     * 根据内容，生成指定宽高、指定格式的二维码图片
     *
     * @param text   内容
     * @param width  宽
     * @param height 高
     * @param format 图片格式
     * @return 生成的二维码图片路径
     * @throws Exception
     */
    public static String generateQRCode(String text, int width, int height, String format) throws Exception {
        Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, hints);
       
        String pathName = "D:/new.png";   //指定输出文件的路径
        File outputFile = new File(pathName);
        MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);
     
        return pathName;
    }
    
    /**
     * 随机生成指定长度的验证码
     *
     * @param length 验证码长度
     * @return 生成的验证码
     */
    public  static String generateNumCode(int length) {
        String val = "";
        String charStr = "char";
        String numStr = "num";
        Random random = new Random();

        //参数length，表示生成几位随机数
        for (int i = 0; i < length; i++) {

            String charOrNum = random.nextInt(2) % 2 == 0 ? charStr : numStr;
            //输出字母还是数字
            if (charStr.equalsIgnoreCase(charOrNum)) {
                //输出是大写字母还是小写字母
                int temp = random.nextInt(2) % 2 == 0 ? 65 : 97;
                val += (char) (random.nextInt(26) + temp);
            } else if (numStr.equalsIgnoreCase(charOrNum)) {
                val += String.valueOf(random.nextInt(10));
            }
        }
        return val;
    }
    
    /**
     * 解析指定路径下的二维码图片
     *
     * @param filePath 二维码图片路径
     * @return
     */
    public static String parseQRCode(String filePath) {
        String content = "";
        try {
            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);
            Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
            MultiFormatReader formatReader = new MultiFormatReader();
            Result result = formatReader.decode(binaryBitmap,  hints);

            System.out.println("result 为：" + result.toString());
            System.out.println("resultFormat 为：" + result.getBarcodeFormat());
            System.out.println("resultText 为：" + result.getText());
            //设置返回值
            content = result.getText();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return content;
    }
    
    
    
    
    
}

3.测试类—QRCodeTest.java

package com.ray.test;

import org.junit.Test;
import com.ray.util.QRCodeUtil;


public class QRCodeTest {

    @Test
    public void testQRCode(){
        //String text = QRCodeUtil.generateNumCode(12);  //随机生成的12位验证码
        //System.out.println("随机生成的12位验证码为： " + text);

        String text="你好啊，@￥%2@#$%,//";
        System.out.println("text");
        int width = 100;    //二维码图片的宽
        int height = 100;   //二维码图片的高
        String format = "png";  //二维码图片的格式

        try {
            //生成二维码图片，并返回图片路径
            String pathName = QRCodeUtil.generateQRCode(text, width, height, format);
            System.out.println("生成二维码的图片路径： " + pathName);

            String content = QRCodeUtil.parseQRCode(pathName);
            System.out.println("解析出二维码的图片的内容为： " + content);
        } catch (Exception e) {
            e.printStackTrace();
        }


    }

    

}

参考文章：  Java生成、解析二维码  ( http://www.cnblogs.com/xz-luckydog/p/6402568.html)