条形码/二维码之开源利器ZXing图文介绍

原文地址：http://sjsky.iteye.com/blog/1142177

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：

• zxing.jar
• zxing-j2se.jar

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 michael.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<Object, Object> hints = new Hashtable<Object, Object>();
         // 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 [ [email protected] ]" + "\nTwitter [ @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：

                                
 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：

 

2-2. 解码示例：

 package michael.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<Object, Object> hints = new Hashtable<Object, Object>();
             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 [ [email protected] ]
Twitter [ @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 michael.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：

 

运行后生成的条形码图片如下：

                                           

用手机的扫描软件，识别成功的截图如下：

3-2. 解码示例：

 package michael.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。

 

 

 

转载请注明来自：Michael's blog @ http://sjsky.iteye.com