条形码/二维码之开源利器ZXing图文介绍

openkk 12年前

继前面介绍的一个日本开源软件(该软件只能实现QRCode)原文: Java实现二维码QRCode的编码和解码(http://sjsky.iteye.com/blog/1136934),今发现又一优秀的开源利器-- ZXing,相比而言它更加灵活方便,可以实现多种编码格式。

全文目录:

  • 基本介绍
  • 二维码(比如:QRCode)的编码和解码演示
  • 条形码(比如:EAN-13)的编码和解码演示

【一】、基本介绍

1-1. ZXing是一个开源Java类库用于解析多种格式的条形码和二维码.

官网:http://code.google.com/p/zxing/

截止目前为止最新版本为1.7,提供以下编码格式的支持:

  • UPC-A and UPC-E
  • EAN-8 and EAN-13
  • Code 39
  • Code 93
  • Code 128
  • QR Code
  • ITF
  • Codabar
  • RSS-14 (all variants)
  • Data Matrix
  • PDF 417 ('alpha' quality)
  • Aztec ('alpha' quality)

同时官网提供了 Android、cpp、C#、iPhone、j2me、j2se、jruby、objc、rim、symbian等多种应用的类库,具体详情可以参考下载的源码包中。

1-2. 本文和之前的那篇文章一样,主要是在PC上实现条形码(EAN-13)和二维码(QRCode)的编码和解码的示例,以供大家参考,用到了源码中core和javase下面的相关源代码,附件提供自己编译之后的lib包:

有关各种手机系统的应用,有兴趣的朋友可以下载官方源码包,包下有具体详细的应用介绍。

【二】、二维码(QRCode)的编码和解码演示:

2-1. 编码示例:

package com.zxing;

import java.io.File;
import java.util.Hashtable;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**
 * @blog http://sjsky.iteye.com
 * @author Michael
 */
public class ZxingEncoderHandler {

 /**
  * 编码
  *
  * @param contents
  * @param width
  * @param height
  * @param imgPath
  */
 public void encode(String contents, int width, int height, String imgPath) {
  Hashtable hints = new Hashtable();
  // 指定纠错等级
  hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
  // 指定编码格式
  hints.put(EncodeHintType.CHARACTER_SET, "GBK");
  try {
   BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,
     BarcodeFormat.QR_CODE, width, height, hints);

   MatrixToImageWriter
     .writeToFile(bitMatrix, "png", new File(imgPath));

  } catch (Exception e) {
   e.printStackTrace();
  }
 }

 /**
  * @param args
  */
 public static void main(String[] args) {
  String imgPath = "d:/test/twocode/michael_zxing.png";
  String contents = "Hello Michael(大大),welcome to Zxing!"
    + "\nMichael’s blog [ http://sjsky.iteye.com ]"
    + "\nEMail [ sjsky007@gmail.com ]" + "\n推ter [ @suncto ]";
  int width = 300, height = 300;
  ZxingEncoderHandler handler = new ZxingEncoderHandler();
  handler.encode(contents, width, height, imgPath);

  System.out.println("Michael ,you have finished zxing encode.");
 }
}

 

运行后生成的二维码图片如下:

 条形码/二维码之开源利器ZXing图文介绍

和前篇介绍一样,用手机的二维码扫描软件(本人用的:android 快拍二维码)来测试下,识别成功的截图如下:

条形码/二维码之开源利器ZXing图文介绍

2-2. 解码示例:

package com.zxing;

import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Hashtable;

import javax.imageio.ImageIO;

import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.HybridBinarizer;

/**
 * @blog http://sjsky.iteye.com
 * @author Michael
 */
public class ZxingDecoderHandler {

 /**
  * @param imgPath
  * @return String
  */
 public String decode(String imgPath) {
  BufferedImage image = null;
  Result result = null;
  try {
   image = ImageIO.read(new File(imgPath));
   if (image == null) {
    System.out.println("the decode image may be not exit.");
   }
   LuminanceSource source = new BufferedImageLuminanceSource(image);
   BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

   Hashtable hints = new Hashtable();
   hints.put(DecodeHintType.CHARACTER_SET, "GBK");

   result = new MultiFormatReader().decode(bitmap, hints);
   return result.getText();
  } catch (Exception e) {
   e.printStackTrace();
  }
  return null;
 }

 /**
  * @param args
  */
 public static void main(String[] args) {
  String imgPath = "d:/test/twocode/michael_zxing.png";
  ZxingDecoderHandler handler = new ZxingDecoderHandler();
  String decodeContent = handler.decode(imgPath);
  System.out.println("解码内容如下:");
  System.out.println(decodeContent);
  System.out.println("Michael ,you have finished zxing decode.");

 }
}

运行结果如下:

解码内容如下:
Hello Michael(大大),welcome to Zxing!
Michael’s blog [ http://sjsky.iteye.com ]
EMail [ sjsky007@gmail.com ]
推ter [ @suncto ]

Michael ,you have finished zxing decode.

  从测试结果可见:解码出的内容和之前编码的内容是一致

【三】、条形码(EAN-13)的编码和解码演示:

3-1. 编码示例:

package com.zxing;

import java.io.File;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;

/**
 * @blog http://sjsky.iteye.com
 * @author Michael
 */
public class ZxingEAN13EncoderHandler {
 /**
  * 编码
  *
  * @param contents
  * @param width
  * @param height
  * @param imgPath
  */
 public void encode(String contents, int width, int height, String imgPath) {
  int codeWidth = 3 + // start guard
    (7 * 6) + // left bars
    5 + // middle guard
    (7 * 6) + // right bars
    3; // end guard
  codeWidth = Math.max(codeWidth, width);
  try {
   BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,
     BarcodeFormat.EAN_13, codeWidth, height, null);

   MatrixToImageWriter
     .writeToFile(bitMatrix, "png", new File(imgPath));

  } catch (Exception e) {
   e.printStackTrace();
  }
 }

 /**
  * @param args
  */
 public static void main(String[] args) {
  String imgPath = "d:/test/twocode/zxing_EAN13.png";
  // 益达无糖口香糖的条形码
  String contents = "6923450657713";

  int width = 105, height = 50;
  ZxingEAN13EncoderHandler handler = new ZxingEAN13EncoderHandler();
  handler.encode(contents, width, height, imgPath);

  System.out.println("Michael ,you have finished zxing EAN13 encode.");
 }
}

6 923450 657713 对应的是益达无糖口香糖:

 条形码/二维码之开源利器ZXing图文介绍

运行后生成的条形码图片如下:

 条形码/二维码之开源利器ZXing图文介绍

用手机的扫描软件,识别成功的截图如下:

 条形码/二维码之开源利器ZXing图文介绍

3-2. 解码示例:

package com.zxing;

import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;

import com.google.zxing.BinaryBitmap;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.HybridBinarizer;

/**
 * @blog http://sjsky.iteye.com
 * @author Michael
 */
public class ZxingEAN13DecoderHandler {

 /**
  * @param imgPath
  * @return String
  */
 public String decode(String imgPath) {
  BufferedImage image = null;
  Result result = null;
  try {
   image = ImageIO.read(new File(imgPath));
   if (image == null) {
    System.out.println("the decode image may be not exit.");
   }
   LuminanceSource source = new BufferedImageLuminanceSource(image);
   BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

   result = new MultiFormatReader().decode(bitmap, null);
   return result.getText();
  } catch (Exception e) {
   e.printStackTrace();
  }
  return null;
 }

 /**
  * @param args
  */
 public static void main(String[] args) {
  String imgPath = "d:/test/twocode/zxing_EAN13.png";
  ZxingEAN13DecoderHandler handler = new ZxingEAN13DecoderHandler();
  String decodeContent = handler.decode(imgPath);
  System.out.println("解码内容如下:");
  System.out.println(decodeContent);
  System.out.println("Michael ,you have finished zxing EAN-13 decode.");

 }
}

运行结果如下:

写道
解码内容如下:
6923450657713
Michael ,you have finished zxing decode.

从测试结果可见:解码出的内容和之前编码的内容是一致。