java 二维码

使用QRCode.jar进行二维码的生成与解码；

本文非原创，参考网上找来的资料；

 

package com.wxthtf.iot.common;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;

import org.apache.log4j.Logger;

import com.swetake.util.Qrcode;

import java.io.*;

import jp.sourceforge.qrcode.QRCodeDecoder;
import jp.sourceforge.qrcode.data.QRCodeImage;

/**
 * <li>Title: TwoDivCodeGenerator.java</li>
 * <li>Project: AnyIOT</li>
 * <li>Package: com.wxthtf.test</li>
 * <li>Description: </li>
 * <li>Copyright: Copyright (c) 2012</li>
 * <li>Company: wxthtf Technologies </li>
 * <li>Created on Feb 10, 2012 8:41:06 AM</li>
 *
 * @author chun_chang
 * @version 1.0.0.0
 *
 */
public class TwoDivCodeGenerator{
 private static String code = "UTF-8";
 private static final Logger log = Logger.getLogger(TwoDivCodeGenerator.class);
 /**
  * 描述：imgGenerate
  * @param srcStr
  * @param imgName 全文件名，如C:\\aaa.png
  * @param widths
  * @param heights
  * @return
  * @CreateOn Feb 10, 2012  9:37:56 AM
  * @author chun_chang
  */
 public static boolean imgGenerate(String srcStr, String imgName) {
  try {
   Qrcode qrcode = new Qrcode();
   qrcode.setQrcodeErrorCorrect('H');//LMQH
   qrcode.setQrcodeEncodeMode('B');
   qrcode.setQrcodeVersion(0);//0-15

   byte[] d = srcStr.getBytes(code);
   boolean[][] b = qrcode.calQrcode(d);
   int widths = b.length * 3 + 4;
   int heights = b.length * 3 + 4;
   
   BufferedImage bi = new BufferedImage(widths, heights, BufferedImage.TYPE_INT_RGB);
   Graphics2D g = bi.createGraphics();
   g.setBackground(Color.WHITE);
   g.setColor(Color.BLACK);
   g.clearRect(0, 0, widths, heights);

   if(d.length > 0 && d.length < 1000) {
    for(int i = 0; i < b.length; i++) {
     for(int j = 0; j < b.length; j++) {
      if(b[j][i]) {
       g.fillRect(j * 3 + 2, i * 3 + 2, 3, 3);
      }
     }
    }
   } else {
    log.error("二维码字符串过长");
   }

   g.dispose();
   bi.flush();

   String imgType = imgName.substring(imgName.lastIndexOf('.') + 1, imgName.length());
   File f = new File(imgName);
   ImageIO.write(bi, imgType, f);

   return true;
  } catch(Exception e) {
   log.error(e, e);
   return false;
  }
 }

 public static String decoderImg(String fileName) {
  QRCodeDecoder decoder = new QRCodeDecoder();
  File imageFile = new File(fileName);
  BufferedImage image = null;

  String str = "";
  try {
   image = ImageIO.read(imageFile);
   str = new String(decoder.decode(new J2SEImage(image)), code);
  } catch(Exception e) {
   e.printStackTrace();
  }
  return str;
 }

 public static void main(String[] args) throws Exception {
  String testString = "清华同方";
  String fileName = "C:\\123.png";
  TwoDivCodeGenerator.imgGenerate(testString, fileName);
  
  String str = TwoDivCodeGenerator.decoderImg(fileName);
  System.out.println(str);
 }

}

class J2SEImage implements QRCodeImage{
 BufferedImage image;

 public J2SEImage(BufferedImage image){
  this.image = image;
 }

 public int getWidth() {
  return image.getWidth();
 }

 public int getHeight() {
  return image.getHeight();
 }

 public int getPixel(int x, int y) {
  return image.getRGB(x, y);
 }

}

 

评论

2 楼 liuhonggang123 2013-09-27  

比较好

1 楼 814687491 2013-09-11  

这个JAR包分享得不得！加油！