JavaUtil_02_二维码的生成与解析

时间：2021-07-26 08:29:20

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)

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