条形码/二维码之开源利器ZXing图文介绍

本文介绍如何使用ZXing库生成和解析二维码及EAN-13条形码,包括编码设置、图像生成及解码流程。

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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:

Java代码
  1. package michael.zxing;  
  2.   
  3. import java.io.File;  
  4. import java.util.Hashtable;  
  5.   
  6. import com.google.zxing.BarcodeFormat;  
  7. import com.google.zxing.EncodeHintType;  
  8. import com.google.zxing.MultiFormatWriter;  
  9. import com.google.zxing.client.j2se.MatrixToImageWriter;  
  10. import com.google.zxing.common.BitMatrix;  
  11. import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;  
  12.   
  13. /** 
  14.  * @blog http://sjsky.iteye.com 
  15.  * @author Michael 
  16.  */  
  17. public class ZxingEncoderHandler {  
  18.   
  19.     /** 
  20.      * 编码 
  21.      * @param contents 
  22.      * @param width 
  23.      * @param height 
  24.      * @param imgPath 
  25.      */  
  26.     public void encode(String contents, int width, int height, String imgPath) {  
  27.         Hashtable<Object, Object> hints = new Hashtable<Object, Object>();  
  28.         // 指定纠错等级  
  29.         hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);  
  30.         // 指定编码格式  
  31.         hints.put(EncodeHintType.CHARACTER_SET, "GBK");  
  32.         try {  
  33.             BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,  
  34.                     BarcodeFormat.QR_CODE, width, height, hints);  
  35.   
  36.             MatrixToImageWriter  
  37.                     .writeToFile(bitMatrix, "png"new File(imgPath));  
  38.   
  39.         } catch (Exception e) {  
  40.             e.printStackTrace();  
  41.         }  
  42.     }  
  43.   
  44.     /** 
  45.      * @param args 
  46.      */  
  47.     public static void main(String[] args) {  
  48.         String imgPath = "d:/test/twocode/michael_zxing.png";  
  49.         String contents = "Hello Michael(大大),welcome to Zxing!"  
  50.                 + "\nMichael’s blog [ http://sjsky.iteye.com ]"  
  51.                 + "\nEMail [ sjsky007@gmail.com ]" + "\nTwitter [ @suncto ]";  
  52.         int width = 300, height = 300;  
  53.         ZxingEncoderHandler handler = new ZxingEncoderHandler();  
  54.         handler.encode(contents, width, height, imgPath);  
  55.   
  56.         System.out.println("Michael ,you have finished zxing encode.");  
  57.     }  
  58. }  

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 [ sjsky007@gmail.com ]" + "\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:

Java代码 复制代码 
</pre><img class="spinner" style="DISPLAY: none" src="https://i-blog.csdnimg.cn/blog_migrate/03438c43d1f1b1d048816225a6d2e6a7.gif" alt="" /></div></div><ol class="dp-j"><li><span class="keyword">package</span> michael.zxing;   </li><li>  </li><li><span class="keyword">import</span> java.awt.image.BufferedImage;   </li><li><span class="keyword">import</span> java.io.File;   </li><li><span class="keyword">import</span> java.util.Hashtable;   </li><li>  </li><li><span class="keyword">import</span> javax.imageio.ImageIO;   </li><li>  </li><li><span class="keyword">import</span> com.google.zxing.BinaryBitmap;   </li><li><span class="keyword">import</span> com.google.zxing.DecodeHintType;   </li><li><span class="keyword">import</span> com.google.zxing.LuminanceSource;   </li><li><span class="keyword">import</span> com.google.zxing.MultiFormatReader;   </li><li><span class="keyword">import</span> com.google.zxing.Result;   </li><li><span class="keyword">import</span> com.google.zxing.client.j2se.BufferedImageLuminanceSource;   </li><li><span class="keyword">import</span> com.google.zxing.common.HybridBinarizer;   </li><li>  </li><li><span class="comment">/** </span> </li><li><span class="comment"> * @blog http://sjsky.iteye.com </span> </li><li><span class="comment"> * @author Michael </span> </li><li><span class="comment"> */</span>  </li><li><span class="keyword">public</span> <span class="keyword">class</span> ZxingDecoderHandler {   </li><li>  </li><li>    <span class="comment">/** </span> </li><li><span class="comment">     * @param imgPath </span> </li><li><span class="comment">     * @return String </span> </li><li><span class="comment">     */</span>  </li><li>    <span class="keyword">public</span> String decode(String imgPath) {   </li><li>        BufferedImage image = <span class="keyword">null</span>;   </li><li>        Result result = <span class="keyword">null</span>;   </li><li>        <span class="keyword">try</span> {   </li><li>            image = ImageIO.read(<span class="keyword">new</span> File(imgPath));   </li><li>            <span class="keyword">if</span> (image == <span class="keyword">null</span>) {   </li><li>                System.out.println(<span class="string">"the decode image may be not exit."</span>);   </li><li>            }   </li><li>            LuminanceSource source = <span class="keyword">new</span> BufferedImageLuminanceSource(image);   </li><li>            BinaryBitmap bitmap = <span class="keyword">new</span> BinaryBitmap(<span class="keyword">new</span> HybridBinarizer(source));   </li><li>  </li><li>            Hashtable<Object, Object> hints = <span class="keyword">new</span> Hashtable<Object, Object>();   </li><li>            hints.put(DecodeHintType.CHARACTER_SET, <span class="string">"GBK"</span>);   </li><li>  </li><li>            result = <span class="keyword">new</span> MultiFormatReader().decode(bitmap, hints);   </li><li>            <span class="keyword">return</span> result.getText();   </li><li>        } <span class="keyword">catch</span> (Exception e) {   </li><li>            e.printStackTrace();   </li><li>        }   </li><li>        <span class="keyword">return</span> <span class="keyword">null</span>;   </li><li>    }   </li><li>  </li><li>    <span class="comment">/** </span> </li><li><span class="comment">     * @param args </span> </li><li><span class="comment">     */</span>  </li><li>    <span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> main(String[] args) {   </li><li>        String imgPath = <span class="string">"d:/test/twocode/michael_zxing.png"</span>;   </li><li>        ZxingDecoderHandler handler = <span class="keyword">new</span> ZxingDecoderHandler();   </li><li>        String decodeContent = handler.decode(imgPath);   </li><li>        System.out.println(<span class="string">"解码内容如下:"</span>);   </li><li>        System.out.println(decodeContent);   </li><li>        System.out.println(<span class="string">"Michael ,you have finished zxing decode."</span>);   </li><li>  </li><li>    }   </li><li>}  </li></ol></div><pre title="条形码/二维码之开源利器ZXing图文介绍" class="java" style="DISPLAY: none" name="code" codeable_id="" codeable_type="BlogComment" source_url="http://sjsky.iteye.com/blog/1142177#" pre_index="1">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 [ sjsky007@gmail.com ]
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:

Java代码 复制代码  收藏代码
  1. package michael.zxing;   
  2.   
  3. import java.io.File;   
  4.   
  5. import com.google.zxing.BarcodeFormat;   
  6. import com.google.zxing.MultiFormatWriter;   
  7. import com.google.zxing.client.j2se.MatrixToImageWriter;   
  8. import com.google.zxing.common.BitMatrix;   
  9.   
  10. /**  
  11.  * @blog http://sjsky.iteye.com  
  12.  * @author Michael  
  13.  */  
  14. public class ZxingEAN13EncoderHandler {   
  15.   
  16.     /**  
  17.      * 编码  
  18.      * @param contents  
  19.      * @param width  
  20.      * @param height  
  21.      * @param imgPath  
  22.      */  
  23.     public void encode(String contents, int width, int height, String imgPath) {   
  24.         int codeWidth = 3 + // start guard  
  25.                 (7 * 6) + // left bars  
  26.                 5 + // middle guard  
  27.                 (7 * 6) + // right bars  
  28.                 3// end guard  
  29.         codeWidth = Math.max(codeWidth, width);   
  30.         try {   
  31.             BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,   
  32.                     BarcodeFormat.EAN_13, codeWidth, height, null);   
  33.   
  34.             MatrixToImageWriter   
  35.                     .writeToFile(bitMatrix, "png"new File(imgPath));   
  36.   
  37.         } catch (Exception e) {   
  38.             e.printStackTrace();   
  39.         }   
  40.     }   
  41.   
  42.     /**  
  43.      * @param args  
  44.      */  
  45.     public static void main(String[] args) {   
  46.         String imgPath = "d:/test/twocode/zxing_EAN13.png";   
  47.         // 益达无糖口香糖的条形码   
  48.         String contents = "6923450657713";   
  49.   
  50.         int width = 105, height = 50;   
  51.         ZxingEAN13EncoderHandler handler = new ZxingEAN13EncoderHandler();   
  52.         handler.encode(contents, width, height, imgPath);   
  53.   
  54.         System.out.println("Michael ,you have finished zxing EAN13 encode.");   
  55.     }   
  56. }  
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:

Java代码 复制代码  收藏代码
  1. package michael.zxing;   
  2.   
  3. import java.awt.image.BufferedImage;   
  4. import java.io.File;   
  5.   
  6. import javax.imageio.ImageIO;   
  7.   
  8. import com.google.zxing.BinaryBitmap;   
  9. import com.google.zxing.LuminanceSource;   
  10. import com.google.zxing.MultiFormatReader;   
  11. import com.google.zxing.Result;   
  12. import com.google.zxing.client.j2se.BufferedImageLuminanceSource;   
  13. import com.google.zxing.common.HybridBinarizer;   
  14.   
  15. /**  
  16.  * @blog http://sjsky.iteye.com  
  17.  * @author Michael  
  18.  */  
  19. public class ZxingEAN13DecoderHandler {   
  20.   
  21.     /**  
  22.      * @param imgPath  
  23.      * @return String  
  24.      */  
  25.     public String decode(String imgPath) {   
  26.         BufferedImage image = null;   
  27.         Result result = null;   
  28.         try {   
  29.             image = ImageIO.read(new File(imgPath));   
  30.             if (image == null) {   
  31.                 System.out.println("the decode image may be not exit.");   
  32.             }   
  33.             LuminanceSource source = new BufferedImageLuminanceSource(image);   
  34.             BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));   
  35.   
  36.             result = new MultiFormatReader().decode(bitmap, null);   
  37.             return result.getText();   
  38.         } catch (Exception e) {   
  39.             e.printStackTrace();   
  40.         }   
  41.         return null;   
  42.     }   
  43.   
  44.     /**  
  45.      * @param args  
  46.      */  
  47.     public static void main(String[] args) {   
  48.         String imgPath = "d:/test/twocode/zxing_EAN13.png";   
  49.         ZxingEAN13DecoderHandler handler = new ZxingEAN13DecoderHandler();   
  50.         String decodeContent = handler.decode(imgPath);   
  51.         System.out.println("解码内容如下:");   
  52.         System.out.println(decodeContent);   
  53.         System.out.println("Michael ,you have finished zxing EAN-13 decode.");   
  54.   
  55.     }   
  56. }  
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

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