条形码+二维码,开源利器ZXing

看到一篇:条形码+二维码,编码解码的文章

转自: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:

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:


                                条形码+二维码,开源利器ZXing
 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,开源利器ZXing

 

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:


条形码+二维码,开源利器ZXing

 

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:


条形码+二维码,开源利器ZXing

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。

 

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