通过QRCode生成二维码与解码

先决条件:

1. 需要的JAR包qrcode.jar(官网介绍),直接下载QRCode.jar

将QRCode.jar 加入到Maven库

mvn install:install-file?-DgroupId=[包名]?-DartifactId=[项目名]?-Dversion=[版本号]?-Dpackaging=[jar]?-Dfile=[jar文件所在路径]

?例子:

?mvn install:install-file -DgroupId=com.swetake -DartifactId=QRCode -Dversion=0.9 -Dpackaging=jar -Dfile=./QRCode.jar

?

package com.jc.de.qr;

/** * Created by Shylock on 14/12/31. */

import com.swetake.util.Qrcode;

import javax.imageio.ImageIO;import java.awt.*;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.io.UnsupportedEncodingException;

public class QRCodeFactory {

   public static BufferedImage createQRCode(String text,Integer...version) throws UnsupportedEncodingException {      Qrcode qrcode = new Qrcode(); int v = 3; if (version != null&&version.length!=0) v =version[0]; if (text == null ||text.trim().equals(""))return null; byte[] content = text.getBytes("utf-8");

 boolean[][] codeOut = qrcode.calQrcode(content); int size = codeOut.length*10+10;

?BufferedImage bufferedImage = new BufferedImage(size,size,BufferedImage.TYPE_INT_RGB);

?Graphics2D graphics = bufferedImage.createGraphics();?graphics.setBackground(Color.WHITE);?graphics.clearRect(0, 0, size, size);?graphics.setColor(Color.BLACK); if (content.length > 0 && content.length < 120) {         for (int i = 0; i < codeOut.length; i++) {            for (int j = 0; j < codeOut.length; j++) {               if (codeOut[j][i]) {                  graphics.fillRect(j * 10 + 5, i * 10 + 5, 10, 10);?}            }         }      } else {         throw new UnsupportedEncodingException("QRCode content bytes length = " + content.length + " not in [ 0,120 ]. ");?}      graphics.dispose();?bufferedImage.flush(); return bufferedImage;?}   /** * 方法描述: * * @param args?* @throws UnsupportedEncodingException */?public static void main(String[] args) throws UnsupportedEncodingException {

      File imgFile = new File("/Users/Shylock/Desktop/test.png");// 生成二维码QRCode图片

?try {//图片格式?ImageIO.write(createQRCode("http://www.baidu.com",3,600), "png", imgFile);

?Desktop.getDesktop().open(imgFile);?} catch (IOException e) {         e.printStackTrace();?}

   }}

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